<p>The purpose of this thesis work was to find a way to measure basic light emission properties of nitrogen-and-boron-doped 6H-SiC, which are fabricated with a growth method developed at Linköping University. The research is in its initial phase and the light properties as well as optical measurement techniques are important. The aim is that the results of the measurements will provide feedback to the growth process what quality and doping levels that are required to get the maximum amount of light. The measurements were performed at the Laboratory of Lighting Technology, Technical University of Darmstadt, Germany.</p><p>Two measuring methods with different excitation sources were tested: a double monochromator and a setup using near UV-filters. While the double monochromator was able to project wavelengths in steps down to 0.5 nm with a high accuracy, the filters were only available in steps of 10 nm where the accuracy of the wavelength values varied. The double monochromator was chosen for the continuing measurements.</p><p>When using excitation light between 375-390 nm the emitted light was in the visible wavelength region. The light properties measured were the irradiance (measured in W/m²) and the peak wavelength were maximum luminescence occurred.</p><p>The result showed that sample 2-4 had a peak wavelength at approximately 580‑582 nm for the excitation wavelength 375 nm. For sample 5 the peak wavelength occurred at 582 nm at the excitation wavelength 390 nm. Sample 1, the unintentionally doped, did not show any measurable results as expected.</p><p>When irradiance of the excitation light was approx. 8 W/m² the irradiance at the peak of luminescence for the samples varied between 15.03-29.35 mW/m². The low values are believed to be the result of the emitted light scattering in all directions whereas the measurements are done in one direction and only from a small area of the sample.</p><p>The measurements has shown that it is possible to measure the light properties of the grown material even though the samples were not finalized (capsulated) LED’s. The results from the measurements are of interest for the continuing development of the material.</p>

The purpose of this thesis work was to find a way to measure basic light emission properties of nitrogen-and-boron-doped 6H-SiC, which are fabricated with a growth method developed at Linköping University. The research is in its initial phase and the light properties as well as optical measurement techniques are important. The aim is that the results of the measurements will provide feedback to the growth process what quality and doping levels that are required to get the maximum amount of light. The measurements were performed at the Laboratory of Lighting Technology, Technical University of Darmstadt, Germany. Two measuring methods with different excitation sources were tested: a double monochromator and a setup using near UV-filters. While the double monochromator was able to project wavelengths in steps down to 0.5 nm with a high accuracy, the filters were only available in steps of 10 nm where the accuracy of the wavelength values varied. The double monochromator was chosen for the continuing measurements. When using excitation light between 375-390 nm the emitted light was in the visible wavelength region. The light properties measured were the irradiance (measured in W/m2) and the peak wavelength were maximum luminescence occurred. The result showed that sample 2-4 had a peak wavelength at approximately 580‑582 nm for the excitation wavelength 375 nm. For sample 5 the peak wavelength occurred at 582 nm at the excitation wavelength 390 nm. Sample 1, the unintentionally doped, did not show any measurable results as expected. When irradiance of the excitation light was approx. 8 W/m2 the irradiance at the peak of luminescence for the samples varied between 15.03-29.35 mW/m2. The low values are believed to be the result of the emitted light scattering in all directions whereas the measurements are done in one direction and only from a small area of the sample. The measurements has shown that it is possible to measure the light properties of the grown material even though the samples were not finalized (capsulated) LED’s. The results from the measurements are of interest for the continuing development of the material.

照明產業現在正面臨前所未有的革命，發光二極體正慢慢地取代我們所稱的燈泡、燈管。當新科技取代舊科技的同時，產業也跟著洗牌，各國政府莫不傾政府之力來推動照明產業的革命，企圖在產業洗牌後能夠佔據一席之地。目前全球五大LED公司分別是日本的日亞化學、豐田合成、美國的Cree、歐洲的Philips Lumileds、與德國的Osram。本論文特別針對Cree公司的發展歷程與策略加以分析，期望藉由探討國外公司的優勢、劣勢，提供國內產業一借鏡。 策略是企業一連串搭配的活動組合。本論文以吳思華教授的策略三構面、競技場理論對Cree公司的各種活動組合進行分析。由產品範疇、核心能力、事業網路的分析可知，Cree公司善用事業網路的資源來建立自身的核心能力，並不斷地重新擬定產品範疇。於核心能力的部分，本論文引用周延鵬教授智慧資本理論，透過分析更能瞭解利用專利的商業策略，透過事業網路也能快速地建立智慧資本─核心能力。 本論文認為Cree公司發展分為三階段。第一階段1987～1998年，為產品範疇的定義時期，以DOE與Defense Department的美國政府計畫做為研發經費來源、NCSU的博士生帶入技術能力，並維持一定的合作，而以兩大客戶Osram與住友來支持整體公司的營收。第二階段1999年～2002年，Cree以智財與技術的授權 (Nitres與UCSB技術連結)、訴訟 (Lawsuit partners: NCSU、BU、Rohm與中村修二)、併購Nitres的策略佈局，將營收快速擴張到2億美元。第三階段2003年以後，Cree選擇封裝產品、LED燈具產品進行10億美元的營收目標，實際併購Cotco、LLF與Zumtobel策略合作，以LED city、LED University、Led workplace，再聯合照明系統伙伴提供光、電、熱的LED照明解決方案，推廣與教育更多的LED照明。 以策略競技場分析，可以很清楚比較出Cree所處的LED產業與其他競爭者的競爭態勢，第一個競爭比較層次是產品/服務的「價值/效率」競技場，Big 5與台廠分屬於價值與效率的兩端。第二層次競爭比較是企業總體的「結構/能耐」競技場，Big5廠商以專利交互授權形成結構障礙，而台廠處於能耐的一端。第三層次競爭是產業網路的資源比較，Osram、Philips Lumileds、TG、Nichia以母集團的自身能力而處實力一端，Cree積極的採用合縱策略串起自身的供應鏈體系，台廠則以台灣內需的上下游供應關係形成自己的體系。Cree不斷地利用體系的力量來建立競爭優勢，符合四競技場理論的架構。 台灣LED產業發展甚早，產業鏈分工完整、研發投入、研發成果、企業獲利、、、等等比起Cree公司毫不遜色。 （一）從價值─效率來看，Cree擁有產品性能(價值)後，於是Cree併購Cotco，增加規模降低成本，能繼續帶給客戶效率；LED台灣廠商如晶電，不斷藉著水平整合、增加規模、降低生產成本，達到了良好的效率。接著應當思考給客戶效率的同時，再給予更高的價值。 （二）從結構─能耐來看，五大廠商藉由專利與訴訟、較長的學習曲線和較大的經濟規模擴充，建立起相當的結構的競爭的進入障礙。台灣廠商如晶電，發展和專利的佈局較五大廠晚，但卻憑藉著工研院研發團隊建立起的技術，再透過自有研發與產業併購，累積起足夠的能耐。如能再學習Cree靈活運用專利與訴訟之策略，能使結構的競爭力更加強大。 （三）從體系─實力來看，台灣廠商與Cree相同，靠的是善用體系的力量來競爭。例如晶元光電、億光電子、光寶電子、、、等許多國內LED產業形成一完整、高效率的供應體系。然而台灣的體系實力，從電子業、IT產業發展歷史來看，多半侷限在製造體系，微笑曲線的最前的研發與最後的品牌通路一直都不發達。 從Cree的經驗來看，體系的競爭力可以擴展到製造之外，此時Cree正在進行的是建立一個以Cree為核心的照明體系，能不能成功是未知數，但對於善於運用體系、創造Win-Win的Cree來說無疑是一大機會。 因此善用體系競爭的台灣廠商，也可思考如何擴大體系力量的範疇，使體系的分工能夠結合前瞻研究、研發、專利、生產、標準、規範、物流、品牌、行銷等等。 / Lighting industry is confronted with an intense revolution that light emitted diode (LED) lighting is replacing traditional lighting. The change of technology results in the change of industry. Every government tries hard to promote the development of LED lighting industry to take over the share in the new market. The top five LED companies (Big 5) are Nichia from Japan, Osram for Germany, Philips Lumileds from Netherlands, Cree from America and Toyota Gosei from Japan. The thesis will analyze the history, management, business and competitive strategy of Cree to provide a good case model to Taiwanese LED companies. A strategy is performed with a series of actions in a company. The thesis will apply Dr. Se Hwa Wu’s Three Dimensions of Strategy and Strategy Arenas Theory to analyze every action in Cree. From the analysis of the three dimensions, it can be observed that Cree is good at employing their business networks to build up their core capabilities and continuously re-define their coverage of product line. The thesis will also apply Prof. Y. P. Jou’s Intellectual Property Theory to analyze Cree’s core capabilities and elaborate the patent strategies and how to rapidly create the core capability as intelligent capital through business networks of a company. Cree’s development can be divided to three stages. Stage I was the definition of product lines, from 1987 to 1998. Cree obtained their R&D funding from DOE and U.S. Defense Department and their R&D ability from North Carolina State University. Cree’s two major customers, Osram and Sumitomo, supported their revenue. From 1999 to 2002, Cree used their intelligent property and technology licensing (allied with Nitres and UCSB), lawsuit partners (NCSU, BU, Rohm and Shuji Nakamura) and merger and acquisition with Nitres to increase their revenue up to 200 million U.S. dollars in the end of stage II. After 2003, Cree used LED packages and LED lighting fixtures to increase their revenue to 1 billion U.S. dollar. Cree merged with Cotco and LLF while establishing strategic alliance with Zumtobel. Cree promoted LED with different projects, such as LED city, LED university and LED workplace. Cree also collaborated with their lighting partners who supported total solutions of optics, electron and heat dissipation, to achieve those promotions. Through analysis based on the Strategy Arenas Theory, the competitions between Cree and their competitors in the LED industry will become more obvious. The first arena of strategy is a competition of value and efficiency of product/ service. The Big 5 companies occupy the position closer to the extremity of value and Taiwan companies stay closer to the other side of efficiency in the value chain. The second arena is a competition of structure and capability. Big 5 take more advantages by structural block formed with cross licensing, while Taiwanese companies own greater capability of production. The third arena is an industrial networks level, a competition of networks and strength. Cree and Taiwanese companies both use industrial networks as their advantage, while Osram, Philips Lumileds, Nichia and TG use the strength of their own company to maintain their market share. Cree continuously collaborate with and allies outside resources from partners to establish their competition advantages. Taiwan has developed our LED industry for nearly 30 year manufacturing. The industrial chain, R&D investments, R&D achievement and company revenue are all well established. All these achievements make Taiwanese companies as well qualified as Cree in the LED market. 1. Value vs. efficiency: Cree merged with COTCO Luminant Device Limited, a Hong Kong company (Cotco), to achieve cost down by mass production and to increase production efficiency. A similar example can be seen in Taiwan LED companies, Epistar Corporation. Epistar continuously used horizontal merger and acquisition, to increase production scale, decrease cost and achieve better efficiency in production. Epistar have to perform higher value to their customers at the same time. 2. Structure vs. capability: Big 5 constructed strong entry barriers by patents, lawsuits, longer learning curve and larger finance scale. Taiwan LED companies, Epistar Corporation for example, take the strength of the R&D team of ITRI, in-house R&D, and merger and acquisition to try to catch up on the gap of belated developments and patents arrangement. If Epistar can well apply patents and lawsuit as their strategy, the company would gain more advantage in the competitions. 3. Networks vs. strength: Taiwan LED is similar with Cree to take strength of industrial network. Many LED industries in Taiwan, such as Epistar, Everlight, and Lite-On, have formed a complete and efficient industrial network. However, the network is limited within manufacturing. From the history of electrical industry and IT industry in Taiwan, it can be observed that R&D and marketing, both extremities of Smile Curve, are usually ill-performed. According to the case of Cree, the competition of networks can be expanded out of manufacture. Cree is developing a LED lighting industrial networks from the core of Cree. It is still unknown whether Cree can succeed, but there will be a big chance of Cree who know to well employ networks to create Win-Win strategies. In conclusion, Taiwan companies who well use networks can also think about broadened their networks to combine R&D, manufacture, standardization, SOP, logistics management, trademark and marketing.

Sverige är för tillfället operativa med Helikopter 16 - Black Hawk i Afghanistan. Uppgiften som löses i Afghanistan är främre och taktisk sjuktransport (MEDEVAC). Detta arbete handlar om hur befintliga VMS-system i helikoptrar kan kompletteras i syfte att möta ett föreliggande prickskyttehot vid lösande av främre MEDEVAC i ett insatsområde som miljömässigt liknar Afghanistan. I arbetet analyseras möjliga tekniker utifrån aspekter från ett konstruerat scenario där helikopterbesättningarnas uppgift, insatsmiljö samt hotbild beskrivs. Resultatet visar på att MEDEVAC-helikoptrar kan utrustas med sensor-gimbaler där olika sensorer kan kombineras, vilket möjliggör spaning i 360°. Detta bidrar till den militära nyttan då helikopterpersonalens lösande av uppgift effektiviseras, chansen till överlevnad ökar samtidigt som personal och patienter kan känna sig tryggare. / Currently, Sweden has operative Black Hawk helicopters in Afghanistan. The tasks they are solving in Afghanistan are forward and tactical Medical Evacuation (MEDEVAC). This work is about how existing Electronic Warfare Systems in helicopters can be supplemented in order to face a present sniper-threat during forward MEDEVAC in a conflict area which environmentally reminds of Afghanistan. In this work, a few possible techniques will be analyzed. This analyze will be based on aspects from a constructed scenario where the task to be solved, the conflict area, and the known threat is described. The result shows that MEDEVAC-helicopters can be equipped with operator-controlled sensor-gimbals where different electro-optical sensors can be combined. Gimbals allow reconnaissance in 360°. This contributes to the military utility since the main task can be solved by the helicopter personnel more effectively. Also, the probability of survival will probably increase and the personnel and wounded soldiers might feel more secure than before.

Les méthodes optiques passives de mesures de température comme la thermographie ou la pyrométrie optique sont intéressantes car elles permettent une mesure non intrusive de l’objet cible à condition de connaître le facteur d’émission. La connaissance de ce facteur est critique pour déterminer la température de surface par le rayonnement thermique émis dans un domaine spectral. Le pyromètre bichromatique impulsionnel permet de surmonter la connaissance de ce paramètre à condition que le choix des valeurs de longueurs d’onde soit fait avec précautions. Lorsque l’objet à mesurer est situé dans un environnement industriel, de telles méthodes optiques sont fortement perturbées par la présence d’un milieu optiquement absorbant. C’est également le cas pour des objets situés dans des environnements très chauds qui émettent d’intenses radiations interférentes. Dans cette thèse, nous présentons une méthode radiométrique active bichromatique pour mesurer la température d’une surface en milieu industriel. Cette méthode est basée sur une excitation locale par une source laser modulée dans l’infrarouge. La détection de la température qui est corrélé avec l’excitation permet d’extraire par détection synchrone le signal modulé noyé dans un bruit jusqu’à un million de fois supérieur. Travailler à courtes longueurs d’onde (domaine visible et proche infrarouge) offre une grande dynamique et minimise l’erreur induite par les variations d’émissivité avec la longueur d’onde. Ce système collecte le rayonnement émis par l’objet à distance, de quelques mètres à plusieurs dizaines de mètres selon la configuration du système optique. Le principe de la méthode de mesure, le système optique et l’appareillage sont présentés dans ce rapport ainsi que les études théoriques et expérimentales sur la sensibilité, sa calibration et les résultats obtenus sur différents sites industriels. / Optical passive methods of temperature measurements such as thermography or optical pyrometry are very interesting because they allow a non-intrusive measurement with the target object provided to know the emission factor. The knowledge of this factor is critical for determining the actual temperature of a surface from the thermal radiation emitted in a wavelength band. The bichromatic pulsed pyrometer allows to overcome the knowledge of this parameter provided that precautions are taken in the choice of the values of wavelengths. When the object to be measured is placed in industrial environments, such passive optical methods are greatly disturbed by the presence of an optically absorbing medium. It is also distorted for objects located in very hot environments emitting intense interfering radiation. In this thesis, we present an active bichromatic radiometric method for measuring the temperature of a surface in harsh environments. The method is based on a localized excitation by a modulated laser source in the infrared range. Detecting the temperature range which is correlated with the excitation allows a synchronous detection to extract the signal embedded in a noise up to 106 times superior. Working at short wavelengths (visible range and near infrared range) offers a large dynamic range and minimizes the error due to variations in emissivity with the wavelength. This system collects the radiation emitted by the object at a distance from a few meters up to dozens of meters depending on the configuration of the optical system. The principle of the measurement method, the optical wavelength separation system and the telemetry apparatus are presented in this report as well as the theoretical and experimental study of the sensitivity of the device, its calibration and the results obtained in different industrial sites.

Cette thèse propose une nouvelle méthode, via les outils de dosimétrie et de statistiques, pour l'évaluation de l'exposition globale d'une population aux champs électromagnétiques (EMFs) radiofréquences en prenant en compte les différentes technologies, usages et environnements... Nous avons analysé pour la première fois l'exposition moyenne d'une population induite par un réseau 3G, tout en considérant à la fois les émissions EMFs montantes et descendantes dans des différents pays, dans des différentes zones géographiques et pour les différents usages des mobiles. Les résultats montrent une forte hétérogénéité de l'exposition dans le temps et dans l'espace. Contrairement à la croyance populaire, l'exposition aux ondes EMFs 3G est dominée par les émissions montantes, résultant de l'usage voix et data. En outre, l'exposition moyenne de la population diffère d'une zone géographique à une autre, ainsi que d'un pays à un autre, en raison des différentes architectures de réseau cellulaire et de la variabilité de l'usage des mobiles. Ensuite, la variabilité et les incertitudes liées à ces facteurs ont été caractérisées. Une analyse de sensibilité basée sur la variance de l'exposition globale a été effectuée dans le but de simplifier son évaluation. Enfin, une méthodologie simplifiée basée sur des outils statistiques avancés a été proposée pour évaluer l'exposition réelle de la population en tenant compte de la variabilité liée à l'environnement de propagation, à l'usage, ainsi qu'aux émissions EMFs provenant des mobiles et des stations de base (BTS). Les résultats ont souligné l'importance de la densité de puissance reçue depuis les BTS pour l'exposition globale induite par un réseau macro LTE. / Wireless communication technologies, since their introduction, have evolved very quickly and people have been brought in 30 years into a much closer world. In parallel radiofrequency (RF) electromagnetic fields (EMF) are more and more used. As a consequence, people's attentions around health risks of exposure to RF EMFs have grown just as much as their usages of wireless communication technologies. Exposure to RF EMFs can be characterized using different exposure metrics (e.g., incident field metrics, absorption metrics...). However, the existing methodologies are well suited to the maximum exposure assessment for the individual under the worst-case condition. Moreover in most cases, when dealing with exposure issues, exposures linked to RF EMF emitted from base stations (BTS) and by wireless devices (e.g, mobile phones and tablets) are generally treated separately. This thesis has been dedicated to construct and validate a new method for assessing the real day-to-day RF EMF exposure to a wireless network as a whole, exploring the people's daily life, including both downlink and uplink exposures and taking into account different technologies, usages, environments, etc. Towards these objectives, we analyzed for the first time the average population exposure linked to third generation network (3G) induced EMFs, from both uplink and downlink radio emissions in different countries, geographical areas, and for different wireless device usages. Results, derived from device usage statistics, show a strong heterogeneity of exposure, both in time and space. We show that, contrary to popular belief, exposure to 3G EMFs is dominated by uplink radio emissions, resulting from voice and data traffic, and average population EMF exposure differs from one geographical area to another, as well as from one country to another, due to the different cellular network architectures and variability of mobile usage. Thus the variability and uncertainties linked to these influencing factors were characterized. And a variance-based sensitivity analysis of the global exposure was performed for the purpose of simplifying its evaluation. Finally, a substitution model was built to evaluate the day-to-day global LTE induced EMFs exposure of a population taking into account the variability linked to propagation environment, usage, as well as EMFs from personal wireless devices and BTS. Results have highlighted the importance of received power density from BTS to the issue of global exposure induced by a macro LTE network. This substitution model can be further used to analyze the evolution of the wireless network in terms of EMF exposure.

Η παρούσα διατριβή μελετά τις δυνατότητες υπολογισμού του πεδίου ροής δύο λειτουργικών παραμέτρων συμπεριλαμβανομένων του εκπεμπόμενου θορύβου και των εκπεμπόμενων ρύπων. Εξετάζεται η αλληλεπίδραση της καύσης με το ρευστο-θερμοδυναμικό πεδίο και τις χημικές αντιδράσεις. Περιγράφονται συνοπτικά οι διέπουσες εξισώσεις, οι μέθοδοι και τα μοντέλα της τυρβώδους καύσης και επισημαίνονται τα πλεονεκτήματα του μοντέλου των μεγάλων δινών (LES) το οποίο επιλέχθηκε εδώ. Αναπτύσσεται ένας εύχρηστος, από την ρευστοδυναμική υπολογιστική μεθοδολογία, πολυβηματικός μηχανισμός για δύο καύσιμα άμεσου ενδιαφέροντος το μεθάνιο και το προπάνιο. Προτείνεται, δηλαδή, ένα απλοποιημένο χημικό σχήμα για την οξείδωση των βασικών καυσίμων το οποίο περιέχει τον σχηματισμό του NΟx και της παραγωγής καπναιθάλης. Μετά από ανάλυση του ρόλου της καύσης στην ακουστική διακρίνονται οι δύο χαρακτηριστικοί τύποι: του θορύβου τυρβώδους καύσης (βόμβος – roar) και του θορύβου από τις ταλαντώσεις της καύσης (combustion oscillation). Παρουσιάζεται η κυματική εξίσωση και εισάγεται η έννοια του θερμο-ακουστικού όρου ο οποίος είναι συνάρτηση της απελευθερωμένης θερμότητας (q) στην φλόγα και εμφανίζεται ως όρος πηγής στην βασική εξίσωση. Στη συνέχεια η φλόγα εξετάζεται ως αυτόνομος πηγή αλλά και ως ενισχυτής θορύβου. Με την προσέγγιση της Προσομοίωσης των Μεγάλων Δινών (Large Eddy Simulation, LES) αναπτύχθηκε μια μεθοδολογία υπολογισμού του θορύβου που εκπέμπεται από το μέτωπο τυρβωδών φλογών διάχυσης. Στο πλαίσιο της προτεινομένης μεθοδολογίας το αποτέλεσμα ήταν η ανάπτυξη ενός τρισδιάστατου προγνωστικού υπολογιστικού κώδικα. Στην συνέχεια υπολογίζεται το αεροθερμοδυναμικό τυρβώδες πεδίο ροής μέσω τελειοποίησης κωδίκων του Εργαστηρίου Τεχνικής Θερμοδυναμικής, των κωδίκων που αναπτύχθηκαν στο πλαίσιο της παρούσης εργασίας αλλά και του εμπορικού κώδικα Fluent. Η μεθοδολογία, που αναπτύχθηκε με την παρούσα ερευνητική εργασία, πιστοποιήθηκε μέσω μιας σειράς πρωτότυπων μετρήσεων, του εκπεμπόμενου θορύβου στις συρρέουσες, εφαπτόμενες και ανυψωμένες και ανακυκλοφορούσες (χαμηλού και υψηλού λόγου καυσίμου/αέρα) φλόγες, σε πρωτότυπες πειραματικές διατάξεις του Εργαστηρίου. Συγκεκριμένα διαμορφώθηκε ένας καινοτόμος αεροδυναμικός φλογοσυγκρατητής πολλαπλών εγχύσεων που διατηρεί μια πλούσια γκάμα φλογών με ιδιαίτερα χαμηλό λόγο καυσίμου/αέρα. Επιτεύχθηκαν πειραματικές μετρήσεις, του ορμικού και θερμοκρασιακού πεδίου διαφόρων μορφών τυρβωδών φλογών, συντάχθηκαν σχετικά διαγράμματα και υπολογίσθηκαν οι αρχικές και οριακές συνθήκες των πειραμάτων. / In the present work the calculation of two parameters, the radiated noise and pollutants are studied. The interaction between combustion, the aerothermodynamical field and the chemical reactions is studied. The equations, the methods and the models of turbulent combustion are described here and the advantages of the large eddy simulation model (LES) which has been chosen for this case, are marked. A multi-step chemistry mechanism is developed for two fuels of great interest: methane and propane. A simple chemical scheme for the oxidation of basic fuels which includes the formation of NOx and soot is suggested in the present work. After analyzing the role of combustion in the acoustics two types of noise are distinguished the turbulent combustion noise and the noise from combustion oscillation. The wave equation is presented and the definition of thermo acoustic term which is a function of the heat release q in flame and it appears as a source term in the basic equation. The flame is examined as an autonomous source as well as a noise amplifier. With the approach of large eddy simulation (LES) a methodology for the noise calculation is developed which noise is from the turbulent diffusion flame front. In the place of the suggested methodology the result was the development of a 3-D computational code. The turbulent aerothermodynamical flow field is computed by codes has been developed in the laboratory of technical thermodynamic and by the commercial code (fluent). The methodology, which has been developed in the present work, has been certificated through a series of original measurements of the emitted noise in coaxial, tangential and lifted flames in original experimentallayouts.