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1 
A computational and analytical study of sound emitted by free shear flowsAvital, Eldad January 1998 (has links)
No description available.

2 
An efficient hybrid scheme for the solution of rotational flow around advanced propellersSrivastava, Rakesh 08 1900 (has links)
No description available.

3 
Experimental and numerical studies of Sshaped diffusing ductsOng, LihYenn January 1997 (has links)
No description available.

4 
Modeling dynamic stall of SC1095 airfoil at high mach numberClark, Brian 26 January 2010 (has links)
In this thesis, the LeishmanBeddoes method of determining airloads for
an airfoil undergoing dynamic stall is studied over a range of Mach numbers. To
validate the method for conditions where little experimental data is available, a
computational fluid dynamics solver is utilized to provide airload predictions for
comparison to the LeishmanBeddoes results.
It is found that even for high Mach numbers the LeishmanBeddoes
method provides reliable predictions for lift coefficient. However, at the higher
Mach numbers pitching moment is sometimes overpredicted at high angle of
attack. This is seemingly due to an inability to accurately determine the center of
pressure in the high speed unsteady flow environment.

5 
A study of transonic normal shock waveturbulent boundary layer interactions in axisymmetric internal flow /Om, Deepak. January 1982 (has links)
Thesis (Ph. D.)University of Washington, 1982. / Vita. Includes bibliographical references.

6 
Influence of loading distribution on the performance of high pressure turbine blades /Corriveau, Daniel, January 1900 (has links)
Thesis (Ph.D.)  Carleton University, 2005. / Includes bibliographical references (p. 295301). Also available in electronic format on the Internet.

7 
Design and analysis of rocket nozzle contours for launching picosatellites /Denton, Brandon Lee. January 2008 (has links)
Thesis (M.S.)Rochester Institute of Technology, 2008. / Typescript. Includes bibliographical references (leaves 110111).

8 
Large eddy simulations (LES) of boundary layer flashback in wallbounded flowsHassanaly, Malik 02 February 2015 (has links)
In the design of highhydrogen content gas turbines for power generation, flashback of the turbulent flame by propagation through the low velocity boundary layers in the premixing region is an operationally dangerous event. The high reactivity of hydrogen combined with enhanced flammability lim its (compared to natural gas) promotes flame propagation along lowspeed boundary layers adjoining the combustion walls. This work focuses on the simulation of boundary layer flashback using largeeddy simulations (LES). A canonical channel configuration is studied to assess the capabilities of LES and determine the modeling requirements for boundary layer flashback simulations. To extend this work to complex geometries, a new reactive lowMach number solver has been written in an unstructured code. / text

9 
Large eddy simulation of buoyant plumesWorthy, Jude 05 1900 (has links)
A 3d parallel CFD code is written to investigate the characteristics of and differences
between Large Eddy Simulation (LES) models in the context of simulating a thermal
buoyant plume. An efficient multigrid scheme is incorporated to solve the Poisson
equation, resulting from the fractional step, projection method used to solve the Low
Mach Number (LMN) NavierStokes equations.
A wide range of LES models are implemented, including a variety of eddy models,
structure models, mixed models and dynamic models, for both the momentum stresses
and the temperature fluxes. Generalised gradient flux models are adapted from their
RANS counterparts, and also tested.
A number of characteristics are observed in the LES models relating to the thermal
plume simulation in particular and turbulence in general. Effects on transition,
dissipation, backscatter, equation balances, intermittency and energy spectra are all
considered, as are the impact of the governing equations, the discretisation scheme,
and the effect of grid coarsening. Also characteristics to particular models are
considered, including the subgrid kinetic energy for the oneequation models, and
constant histories for dynamic models.
The argument that choice of LES model is unimportant is shown to be incorrect as a
general statement, and a recommendation for when the models are best used is given.

10 
Numerical Study Of Low Mach Number Conjugate Natural Convection And Radiation In A Vertical AnnulusReddy, P Venkata 06 1900 (has links)
The problem of low Mach number (nonBoussin´esq) conjugate laminar natural convection combined with surface radiation in a vertical annulus with a centrally located vertical heat generating rod is studied numerically, taking into account the variable transport properties of the fluid. Such problems arise often in practical applications like spent nuclear fuel casks, cooling of electrical and electronic equipment, convection in ovens, cooling of enclosed vertical bus bars and underground transmission cables.
The physical model consists of a vertical heat generating rod, a concentric outer isothermal boundary and adiabatic top and bottom surfaces. The heat generation in the rod drives the natural convection in the annulus. Surface radiation is coupled to natural convection through the solidfluid interface condition and the adiabatic condition of the top and bottom surfaces. A mathematical formulation is written using the governing equations expressing the conservation of mass, momentum and energy for the fluid as well as the energy balance for the solid heat generating rod. The governing equations are discretized on a staggered mesh and are solved using a pressurecorrection algorithm. Steadystate solutions are obtained by timemarching of the time dependent equations. The discretized equations for the dependent variables are solved using the Modified Strongly Implicit Procedure. A global iteration is introduced on the variables at each time step for better coupling. The parameters of the problem are the heat generation and gap width based Grashof number, aspect ratio, radius ratio and the solidtofluid thermal conductivity ratio. The coupling of radiation introduces the wall emissivity and the radiation number as the additional parameters and also necessitates the calculation of radiation configuration factors between the elemental surfaces formed by the computational mesh. The radiant heat exchange is calculated using the radiosity matrix method.
A parametric study is performed by varying Grashof number from 106 to 1010 , aspect ratio from 1 to 15, radius ratio from 2 to 8, the solidtofluid thermal conductivity ratio from 1 to 100, with the Prandtl number 0.7 corresponding to air as the working medium. The characteristic dimension and the outer boundary temperature are fixed. For Radiative calculations, and the emissivity is varied between 0.25 and 0.75. Converged solutions with laminar model could be obtained for high Grashof numbers also as the heat generation based Grashof number is generally two orders of magnitude higher than the temperature difference based Grashof number. Results are presented for the flow and temperature distributions in the form of streamline and isotherm maps. Results are also presented for the variation of various quantities of interest such as the local Nusselt numbers on the inner and outer boundaries, the axial variation of the centerline and interface temperatures, maximum solid, average solid and average interface temperature variations with Grashof number and the average Nusselt number variation for the inner and outer boundaries with Grashof number. The results show that simplification of conjugate problems involving heat generation by the prescription of an isoflux boundary condition on the rod surface is inadequate because a truly isoflux condition cannot be realised on the one hand and because the solid temperature distribution remains unknown with such an approach. The average Nusselt numbers on the inner and outer boundaries show an increasing trend with the Grashof number. For pure natural convection, the Boussin´esq model predicts higher temperatures in the solid and lower average Nusselt numbers on the inner and outer boundaries, compared to the nonBoussin´esq model and the Boussin´esq approximation appears to be adequate roughly upto a Grashof number of 109, beyond which the nonBoussin´esq model is to be invoked. The average pressure in the annulus is found to increase with an increase in the Grashof number. Radiation is found to cause convective drop and homogenize the temperature distribution in the fluid.

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