As the performance required of high pressure turbines continues to increase, there is a need to investigate many details of the flow which occur in a gas turbine stage that were previously overlooked. These include the effects of rotation and three-dimensional flow as well as unsteady effects due to the relative motion of the blade rows. In order to obtain a better understanding of the turbine flowfield a new transient facility has been commissioned in which aerodynamic and heat transfer measurements can be undertaken in a full stage turbine at engine representative conditions. The previously used technique of measuring the heat transfer rate by mounting thin film gauges on models manufactured from machineable glass ceramic was not suitable for use on the rotor blade because of the high stress levels involved. An alternative technique has been developed in which a metal turbine blade is coated with an insulating layer of enamel and thin film gauges painted on top. The developments in signal processing and calibrations which were necessary for the use of this type of thin film gauge are discussed in detail. Signal conditioning electronics have been developed which permit amplification of the thin film gauge output to a higher level within the rotating frame before transmission through a slipring. Extensive tests have been undertaken, in a purpose built spinning rig, to establish the effects of rotation on the performance and mechanical integrity of the instrumentation and associated electronics. The heat transfer measurements recorded in the rotor facility to date are presented and compared with data from a previous two-dimensional simulation of wake passing flow on the mid-height section of the same blade.

This thesis presents a Lagrangian formulation of the Euler equations for subsonic flows. A special coordinate transformation is used to define the Lagrangian coordinates, namely the stream function and the Lagrangian distance, in function of the Cartesian coordinates. This Lagrangian formulation introduces two new geometry state variables, and a Lagrangian behavior parameter defining a pseudo-Lagrangian time used during the iteration procedure to obtain the solution for subsonic flows. / The eigenstructure and characteristics analysis for the new system of equations is based on a linear Jacobian matrix-mapping procedure, which starts from the well-known eigenstructure and characteristics in the Eulerian plane and uses the coordinate transformation to find their counterparts in the Lagrangian plane. This analysis studies the basic properties of the Euler equations in the Lagrangian formulation, such as hyperbolicity, homogeneity and rotational invariance. The Riemann problem in the Lagrangian plane is also studied. Those elements are used to construct the numerical scheme for solving the Euler equations in the Lagrangian formulation. / The numerical scheme is constructed using first and second-order dimensional-splitting with hybrid flux operators, based on flux vector splitting and Godunov methods, which include a 2-D Riemann solver in the Lagrangian plane. The numerical method is validated by comparing the present solutions with the results obtained with an Eulerian formulation for several internal flows. / This numerical method based on a Lagrangian formulation has also been extended for the solution of unsteady subsonic flows by using a dual time approach. The method validation in this case has been done by comparison with the Eulerian formulation solutions for several internal subsonic flows with oscillating boundaries.

In the present study,transint flow analyses of a long oil pipeline are performed.

Thesis (Ph. D.)--Duke University, 2008. / Includes bibliographical references.

Thesis (Ph. D.)--University of Canterbury, 2008. / Typescript (photocopy). "31 January 2008." Includes bibliographical references.

Thesis (M.S.)--Michigan State University. Dept. of Mechanical Engineering, 2008. / "Prof. Norbert Müller [advisor]"--Acknowledgements. Title from PDF t.p. (viewed on July 30, 2009) Includes bibliographical references (p. 96-99). Also issued in print.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1971. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 91-93).

Thesis (PH. D.)--Michigan State University. Mechanical Engineering, 2008. / Title from PDF t.p. (viewed on Sept. 8, 2009) Includes bibliographical references (p. 104-108). Also issued in print.

Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2007. / Yeung, Pui-Kuen, Committee Member ; Lieuwen, Tim, Committee Member ; Menon, Suresh, Committee Chair ; Seitzman, Jerry, Committee Member ; Syed, Saadat, Committee Member.

Atualmente, os avanços tecnológicos, especialmente dos recursos computacionais, possibilitam a realização de cálculos cada vez mais complexos. Em função destes avanços, transitórios hidráulicos antes desprezados ou estimados de forma rudimentar já podem ser calculados, especialmente nos casos em que o comportamento dos transitórios é crítico. Assim, torna-se necessário o desenvolvimento de métodos de cálculo que permitam prever quantitativamente tais transitórios uma vez que não há solução analítica para este problema. Neste trabalho são estudadas as condições de contorno para a utilização do modelo rígido de coluna líquida e sua respectiva solução numérica para o cálculo de transitórios durante o enchimento de uma tabulação com ramificação. Os modelos matemáticos foram testados em laboratório sob diversas condições, comprovando a viabilidade da utilização das ferramentas teóricas e numéricas desenvolvidas. / Nowadays there have been many technological advances, especially related to computational resources, that make possible more complex and huge calculations. Due to these advances, the evaluation of hydraulics transients, which have been disregarded or roughly estimated, is allowed to be more precisely performed especially when transient phenomena have significant importance. Then, the development of calculating methods that evaluates these transients effects becomes necessary once the analitic solution to these problems does not exist. This work presents the study of the boundary conditions of the rigid model applied to the fluid column and its numeral solution in order to calculate the transient behavior during filling of pipeline with ramifications. The results of mathematical models were compared with those from laboratory experiments under several conditions proving the feasibility of theoretical and numeral models.