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Description
Title: | Numerical calculations for flows past an unconventional airfoil |
Author(s): | Tsai, Ping-Ho |
Doctoral Committee Chair(s): | Addy, A.L. |
Department / Program: | Mechanical Science and Engineering |
Discipline: | Mechanical Science and Engineering |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | Ph.D. |
Genre: | Dissertation |
Subject(s): | Engineering, Mechanical |
Abstract: | A computer program has been developed for both two-dimensional compressible and incompressible turbulent flows around airfoils. Numerical solutions have been obtained by solving the steady-state Reynolds-averaged Navier-Stokes equations in primitive variable form. The standard k-$\varepsilon$ turbulence model was employed and a compression turbulence model was also discussed. Based on a non-staggered arrangement on a body-fitted grid system, the discretized transport equations were solved either by a hybrid or a second-order upwind differencing scheme. A multiple pressure correction procedure with implicit density treatment has been used. The solutions were obtained through an under-relaxed iterative process. Various cases of flow past NACA 0012 and 4412 airfoils were examined first. The experimental data available included cases with freestream Mach numbers varying from 0 to 0.799, the chord Reynolds number up to 9 $\times$ 10$\sp6$, and the angle of attack ranging from 0$\sp\circ$ to 13.87$\sp\circ$. The results were good when compared with experimental data. Many cases of incompressible and compressible flows past an unconventional airfoil were then computed. The freestream Mach number varied from 0 to 0.9 with the chord Reynolds number of 3.9 $\times$ 10$\sp6$. The general behavior of the unconventional airfoil is presented. |
Issue Date: | 1990 |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/20229 |
Rights Information: | Copyright 1990 Tsai, Ping-Ho |
Date Available in IDEALS: | 2011-05-07 |
Identifier in Online Catalog: | AAI9021770 |
OCLC Identifier: | (UMI)AAI9021770 |
This item appears in the following Collection(s)
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois -
Dissertations and Theses - Mechanical Science and Engineering