More frequent and harsh storms coupled with sea level rise are affecting Canada’s sensitive coastlines. This research studies Isle Madame in Cape Breton, Nova Scotia which has been designated by Natural Resource Canada as a sea level rise vulnerable coastal community in Canada. The research models the spatial and temporal impacts of sea level rise from storm surge by focusing on identifying vulnerable areas in the community via geographical information systems (GIS) using ArcGIS, as well as modeling dynamic coastal damage via system dynamics using STELLA. The research evaluates the impacts in terms of the environmental, social, cultural, economic pillars that profile the coastal community for a series of modelled Storm Scenarios. This research synthesizes information from a variety of sources including the coastal ecology and natural resources, as well as human society and socioeconomic indicators included in the four mentioned pillars. The objective of the research is to determine vulnerable areas on Isle Madame susceptible to storm damage, and consequently, to improve local community knowledge and preparedness to more frequent harsh storms. This research therefore presents a dynamic model for the evaluation of storm impacts in Isle Madame designed with the goal to help the community ultimately to plan and implement a strategy to adapt to pending environmental change.

[pt] O presente trabalho apresenta um programa de computador digital, que permite avaliar as sobre tensões à freqüência industrial decorrentes da energização de linhas de transmissão. São representados em detalhes o gerador e o seu sistema de excitação. Para uma mesma configuração gerador-excitação é possível simular-se a energização da linha para vários valores de carregamento do gerador e para diferentes valores iniciais de tensão. A utilização prática do programa desenvolvido afigura-se grande, pois pelo seu uso evita-se o emprego de um programa de estabilidade a n máquinas, que geralmente não é adaptado a este tipo de aplicação. / [en] This paper introduces a digital computer program that enables dynamic overvoltages evaluation during transmission line energization. Both synchronous machine and excitation system arefull scale represented. For a given machine-excitation configuration it is possible to simulate line energization for various machine loadings and different initial terminal voltages. The program has great practical advantage because its employ can avoid a multi-machine stability program utilization, which is not adequate for this kind of aplication.

The master thesis subject takes place in the automotive industry and specifically in the internal combustion engine area. The need of improving the efficiency of the engines leads to develop new technologies like turbo compressors. Some of the challenges to overcome are high rotational speed difficulties or extreme load and fatigue in the rotors. By design they are also prone to aerodynamic instabilities like compressor surge. These off design behaviors are not often studied by the manufacturers and therefore not so well known.  The aims are to understand, analyze and possible ameliorate the sources of compressor surge; to identify surge causes; to create a way to reproduce the phenomena with robustness and precision; to be able to study potential solutions to eliminate surge noises. A literature review has been carried out. This would give good metrics to identify surge cycles. Based on the theory developed by Fink et al. (1992) a simulation model has been generated, followed by a process of calibration carried out using data acquired during field experiments. This method uses a fully modifiable simulation model in order to be able to be adapted to a wide range of turbo compressors. The predicted data by the model shows a reasonable agreement with the experimental data. This allows to test control laws with a surge valve or a high pressure gas recirculating valve. The knowledge alongside the simulation would help the team to better apprehend the problem on the future engine generations and have means to avoid the unwanted surge phenomena to occur.

A method for extracting linear raised features from laser scanned altimetry (LiDAR) datasets is presented. The objective is to automate the method so that elements in a coastal storm surge simulation finite element mesh might have their edges aligned along vertical terrain features. Terrain features of interest are those that are high and long enough to form a hydrodynamic impediment while being narrow enough that the features might be straddled and not modeled if element edges are not purposely aligned. These features are commonly raised roadbeds but may occur due to other manmade alterations to the terrain or natural terrain. The implementation uses the TauDEM watershed delineation software included in the MapWindow open source Geographic Information System to initially extract watershed boundaries. The watershed boundaries are then examined computationally to determine which sections warrant inclusion in the storm surge mesh. Introductory work towards applying image analysis techniques as an alternate means of vertical feature extraction is presented as well. Vertical feature lines extracted from a LiDAR dataset for Manatee County, Florida are included in a limited storm surge finite element mesh for the county and Tampa Bay. Storm surge simulations using the ADCIRC-2DDI model with two meshes, one which includes linear raised features as element edges and one which does not, verify the usefulness of the method.

A new method and mechanism for generating non-uniform, or distorted, aircraft engine inlet flow is being developed in order to account for dynamic changes during the creation and propagation of the distortion. Total pressure distortions occur in gas turbine engines when the incoming flow is disturbed. Dynamic total pressure changes may happen slowly, or may occur very rapidly. The disturbance of the incoming flow can change engine operating characteristics, including lowering the surge limit and creating High Cycle Fatigue incidents. In order to create a distorted flow with dynamic characteristics, a mechanism must be developed that when actuated, can change the distortion pattern and intensity with respect to time. This work covers the initial design of both the distorting and actuating device. The design chosen is a low force design that is practically independent of flow forces. This allows the system to be easily sized for all flow conditions. The study also includes developing the working design into an overall prototype. Testing is also performed to validate the design as the most advantageous choice. / Master of Science

yes / This paper models a hydro turbine based on the dynamic description of the hydraulic system having a surge tank and elastic water hammer. The dynamic of the hydraulic system is transformed from transfer function form into the differential equation model in relative value. This model is then combined with the motion equation of the main servomotor to form the nonlinear model of the hydro turbine, in which the power of the hydro turbine is calculated using algebraic equation. A new control model is thus proposed in which the dynamic of the surge tank is taken as an additional input of control items. As such, the complex hydraulic system is decomposed into a classical one penstock and one machine model with an additional input control. Therefore, the order of the system is descended. As a result, the feasibility of the system is largely improved. The simulated results show that the additional input of the surge tank is effective and the proposed method is realizable. / National Natural Science Foundation of China (50839003, 50949037, 51179079), Natural Science Foundation of Yunnan Province (No. 2008GA027)

No description available.

No description available.

No description available.

京都大学 / 新制・課程博士 / 博士(工学) / 甲第23852号 / 工博第4939号 / 新制||工||1771(附属図書館) / 京都大学大学院工学研究科社会基盤工学専攻 / (主査)教授 森 信人, 教授 平石 哲也, 准教授 志村 智也 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM