AN IMPROVED NAVIER–STOKES PROCEDURE FOR ANALYSIS OF TWO-DIMENSIONAL AEROFOILS IN LAMINAR AND TURBULENT FLOWS
✍ Scribed by C. S. Oh; D. H. Choi
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 389 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0271-2091
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✦ Synopsis
An accurate and robust Navier±Stokes procedure to predict the complex ¯ow about an aerofoil has been developed. Much improvement over existing methods is achieved in various aspects of the solution procedure. The computational grid generated by conformal mapping, which is not only orthogonal but aligned with the inviscid streamlines, keeps the equations simple and minimizes the error due to false diffusion. Formal secondorder accuracy is ensured by employing the QUICK scheme for the convective derivatives in the full Navier± Stokes and turbulence transport equations. To treat the separated region properly and to better resolve the ¯ow ®eld in the wake, the two-layer k±e turbulence model is incorporated. The onset of transition is triggered in a unique fashion to warrant the smooth transition to turbulent ¯ow. Sample calculations for various aerofoil sections show that the prediction is improved substantially over those by existing methods. The details of the ¯ow extending to the wake, such as the surface pressure distribution, C Lmax , the velocity ®elds and the Reynolds stress pro®les, are found to be in excellent agreement with the data.