NUMERICAL SOLUTION OF INVISCID FLOW AROUND 3D AERIAL VEHICLES | ||
| International Conference on Aerospace Sciences and Aviation Technology | ||
| Article 33, Volume 12, ASAT Conference, 29-31 May 2007, May 2007, Pages 1-11 PDF (8.55 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/asat.2007.23921 | ||
| Authors | ||
| EBRAHIMI A.1; MAZAHERI K.2; KHATIBIRAD S.1 | ||
| 1Gratuate student, Dpt. of Aero. Eng.,Sharif University of Tech., Tehran, Iran. | ||
| 2Professor, Dpt. of Aero. Eng.,Sharif University of Tech., Tehran, Iran. | ||
| Abstract | ||
| Fundamental steps for inviscid computational fluied dynamics (CFD) analysis of three dimansional aerial configurations including modeling and surface grid generation, volume grid generatiion and solution of the governing equations are studied. For modeling and surface grid generation a simple and rapid algorithm has been used, in which the body is divided into several pieces and each piece is defined with linear triangular patches. These patches are mapped to 2D space and then the surface grid will be genetated in the same space. Finally the inverse mapping to the physical space is obtained and apporpriate data structure for 3D grid generation is generated. For volume grid generation, the Delauny′s triangulation method is used to generate an un structured tetrahedral grid. Using Roe′s upwind and the AUSM+ scheme the Euler equations are solved by using an explicit time marching algorithm. This algorithm is applied on several aerial configurations. convergence and accurancy of the scheme is studied by different means. Afew examples show that the method is applicable on a wide range of problems. | ||
| Keywords | ||
| Euler equations; triangular surface grid; unstructured tetrahedral grid | ||
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