Analysis of wing-body junction flowfields using the incompressible Navier-Stokes equations /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1991.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Abstract: | An incompressible three dimensional Navier-Stokes flow solver has been developed for the analysis of wing-body junction flowfileds on general aviation, light twin-engined aircraft. The numerical scheme used in the code is based on the cell-centered finite volume multistage Runge-Kutta time stepping scheme originally developed by Jameson et al. for the Euler equations and extended to viscous flows by Martinelli(two dimensions) and Vatsa(three dimensions). The code, INCRK3D, uses the techniques of local time stepping, implicit residual averaging, and multigridding to accelerate the solution to convergence. The development of the code was performed by taking the three dimensional compressible Navier-Stokes solver of Vatsa and extensively modifying the code and making it applicable to incompressible flow thru the use of the artificial compressibility concept. The code was then applied to a series of wing-body junction flow test cases for verification, the simplified wing-body junction that was experimentally analyzed by Dickinson, the Cougar wind tunnel model geometry, and the Cougar flight vehicle geometry. The numerical results obtained for the Dickinson test case agreed very well with the experimental data and demonstrated that the code had the ability to simulate the physics of junction flows. The comparison of the numerical and experimental pressure coefficients on the wing surface for the Cougar test cases yielded mixed results, with the wind tunnel results comparing poorly and the flight test results comparing very well. The new code has been found to be numerically efficient and accurate and applicable to simplified wing-body junction geometries. Its development constitutes the initial step in the process of developing an analytical tool capable of aiding in the design of junction drag reduction devices such as flow energizers. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Aerospace Engineering." |
| Physical Description: | 2 volumes : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |