A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering 2016 / The nozzle contour profiles of the CSIR’s supersonic wind tunnel (high speed wind tunnel) were designed to produce smooth, uniform and shock-free flow in the operating section of the facility. The existing profiles produce weak waves in the test section region which induces flow gradients and flow angularities in the air flow, effectively degrading the air flow quality, which in turn perturbs the wind tunnel data. The wind tunnel geometry and tunnel constraints were employed in accordance with the method of characteristics technique to design the supersonic nozzle profiles. The Sivells’ nozzle design method was deemed the most feasible which calculates the profile downstream of the inflection point. The throat block profile was amalgamated with this profile to yield a profile from the throat to the test section. A boundary layer correction was applied to the profiles to account for viscous effects which cause a Mach number reduction from the desired test section Mach number. An automatic computation was used for the profile design and a computational method analysed the Mach distribution, flow angularity and density gradient (to determine the occurrence of shocks and expansions) of the profiles implemented in the tunnel, for the full Mach number range of the HSWT. The methods used, achieved uniform and shock-free flow such that the Mach number and flow angularity were within the acceptable quality limits of the HSWT.

Lui Yiu Wing Howard. / "Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 1996-97, design report." / Includes bibliographical references (leave 109). / Acknowledgements --- p.I / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Background --- p.2 / Chapter 1.2 --- Issues and potential --- p.5 / Chapter 1.3 --- Objectives --- p.6 / Chapter 1.4 --- Concept --- p.7 / Chapter 1.5 --- Development process --- p.8 / Chapter Chapter 2 --- Site Selection --- p.9 / Chapter 2.1 --- Kowloon side --- p.10 / Chapter 2.2 --- Proposed entrance at Tsim Sha Tsui --- p.11 / Chapter 2.3 --- Hong Kong Island side --- p.14 / Chapter 2.4 --- Proposed entrance at Hong Kong Island --- p.15 / Chapter 2.5 --- Choices of route --- p.18 / Chapter 2.6 --- Matrix --- p.24 / Chapter 2.7 --- Final decision & site analysis --- p.25 / Chapter Chapter 3 --- Research and Field Works --- p.31 / Chapter 3.1 --- Underwater tunnel construction (Western Harbour Crossing) --- p.32 / Chapter 3.2 --- Building systems and services of underwater tunnel --- p.40 / Chapter 3.3 --- Environmental impacts and issues --- p.44 / Chapter 3.4 --- Images of under mater (psychological & physiological) compare to underground environment --- p.46 / Chapter Chapter 4 --- Case Studies --- p.47 / Chapter 4.1 --- Hong Kong case studies --- p.48 / Chapter 4.2 --- Overseas case studies --- p.50 / Chapter Chapter 5 --- Project Brief --- p.52 / Chapter 5.1 --- Client profile --- p.53 / Chapter 5.2 --- Programs development --- p.55 / Chapter 5.3 --- Inter-relationship of programs structure --- p.56 / Chapter 5.4 --- Individual program components --- p.57 / Chapter Chapter 6 --- Design Development --- p.58 / Chapter 6.1 --- Design concepts --- p.59 / Chapter 6.2 --- Master layout plan development --- p.65 / Chapter 6.3 --- Schematic design --- p.68 / Chapter Chapter 7 --- Final Design --- p.76 / Chapter 7.1 --- Pre-concept --- p.78 / Chapter 7.2 --- Master planning --- p.81 / Chapter 7.3 --- Tunnel portion --- p.88 / Chapter 7.4 --- Detail design --- p.97 / Chapter 7.5 --- Construction sequence --- p.103 / Chapter 7.6 --- Fire services --- p.106 / Bioliography --- p.109

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2007. / Includes bibliographical references (leaves 184-189). Also available in electronic version.

Thèse de doctorat : Sciences. Génie civil : Ecole centrale de Lyon : 2004. / 249 réf.

Thèse de doctorat : Sciences. Génie civil : Ecole centrale de Lyon : 2004. / Titre provenant de l'écran-titre. 249 réf.

Thesis (Ph. D.)--Worcester Polytechnic Institute. / Keywords: parachute shedding characteristics; near wake evolution; parachute inflation; canopy breathing; velocity field measurements. Includes bibliographical references (p. 126-131).

Αντικείμενο αυτής της διπλωματικής είναι ο χαρακτηρισμός του ασύρματου καναλιού σύγχρονων ασύρματων δικτύων με εφαρμογές για κάλυψη σε τούνελ. Ο χαρακτηρισμός του ασύρματου καναλιού μέσα σε περιβάλλον τούνελ γίνετε στατιστικά. Παρότι είναι δυνατή η αναλυτική και αριθμητική επίλυση του προβλήματος τα στοχαστικά φαινόμενα που επικρατούν κάνουν ιδανικότερη τη στατιστική επίλυση του προβλήματος. Με τον όρο χαρακτηρισμό του ασύρματου καναλιού εννοείται ο προσδιορισμός τριών χαρακτηριστικών του ασύρματου καναλιού. Ο υπολογισμός των απωλειών ισχύος στη διαδρομή που παρεμβάλλεται μεταξύ πομπού και δέκτη και κατά επέκταση ο υπολογισμός της λαμβανόμενης ισχύος στη κεραία το δέκτη. Επίσης, ο υπολογισμός των διακυμάνσεων που υφίσταται το πλάτος του σήματος που λαμβάνεται στο δέκτη. Το πλάτος δεν είναι σταθερό αλλά μεταβάλλεται καθώς ο δέκτης μετακινείται σε μικρές αποστάσεις συγκρίσιμες με το μήκος κύματος του σήματος. Τέλος, η σύγκριση της ληφθείσας ισχύος στο δέκτη με το κατώφλι ευαισθησίας της συσκευής επικοινωνίας του δέκτη με σκοπό τον υπολογισμό της πιθανότητας ‘’να έχει σήμα ο δέκτης’’ δηλαδή να είναι δυνατή η επικοινωνία πομπού και δέκτη. Για να γίνουν αυτοί οι υπολογισμοί χρησιμοποιούνται ανάλογες προσομοιώσεις σε πρόγραμμα λογισμικού προσομοιώσεων. / The subject of this thesis is the characterization of modern and wireless channel networks with applications for coverage in tunnels. The characterization of the wireless channel inside tunnel environments is studied and modeled statistically. While analytical and numerical solutions of the problem are possible, the stochastic nature of the parameters make ideal the statistical approach of the problem. The characterization of a wireless channel aims to identify three characteristics of the wireless channel. First goal is the calculation of the power loss in the path between the transmitter and receiver. Thus the first goal is the calculation of the received power. The second goal is the calculation of the fading and the fluctuations of the received signal. The amplitude of the received signal is not stable but varies as the receiver moves over short distances comparable to the wavelength of the signal. Finally the third goal is to make a comparison of the received power with the sensitivity threshold of the communication device of the receiver in order to calculate the probability that the receiver has acceptable quality signal. To make these calculations there are used software simulations.

No description available.

No description available.

Wind tunnel tests were conducted to investi gate t he effect of placing a propulsion fan behind the tip of a li.tting ring for the purpose of recovering the energy in the trailing vortex. Results indicated tha~ significant increase of thrust could be obtained as a result of vortex energy recovery. In addition, the pre-swirling effect provided b.r the vortex allowed the tan to absorb more power and develop more thrust at a lower rotational speed. / Thesis (M.S.)--Wichita State University, Dept. of Aeronautical Engineering.