Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Aerospace Engineering

First Advisor

Paul A. Durbin

Second Advisor

Tom I-P Shih

Third Advisor

Hui Hu

Abstract

Computational prediction of separated flows is an area of interest, specifically in applications to gas turbine engines, liquid pumps, and many other engineering applications. Although these types of flows are governed by the Navier-Stokes equations, direct numerical simulation (DNS) of practical engineering flows is currently too expensive in terms of the required computational time. It is therefore a case to attempt simulation of these flows using the Reynolds-Averaged Navier-Stokes (RANS) equations which must be closed by utilizing a turbulence closure model.;The present study used the NASA Glenn-HT code, a compressible Navier-Stokes solver, with two different turbulence models, the u2 --f model of Durbin and the zeta-- f model of Hanjalic, to observe their abilities to predict separated flows. The elliptic relaxation turbulence models and their implementation in Glenn-HT are described. Three cases are described to show the ability and limitations of these turbulence models.

DOI

https://doi.org/10.31274/rtd-180813-16638

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Jason Allen Ryon

Language

en

Proquest ID

AAI1455130

OCLC Number

236998812

ISBN

9780549572121

File Format

application/pdf

File Size

45 pages

Share

COinS