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| The application of precondition method in calculations of flows around low-speed projectiles |
| Received:March 06, 2012 Revised:June 05, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201304023 |
| KeyWord:precondition parallel flow field aerodynamics terminal-sensitive ammunition(TSA) |
| Author | Institution |
| 周志超 |
上海机电工程研究所,上海 |
| 王波兰 |
上海机电工程研究所,上海 |
| 赵润祥 |
南京理工大学 能源与动力工程学院,南京 |
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| Abstract: |
| Based on Weiss-Smith preconditioning matrix with global cut-off parameter, the full Reynolds-averaged Navier-Stokes equations are solved using the finite volume discretisation method. A second order linear method is used to interpolate the flow variables to the faces of the control volume. The convection flux then is discretisated by AUSM+-up scheme. The governing equations are integrated in time by the LU-SGS relaxation, which are accelerated by the multigrid method. Combined with MPI message passing method, a kind of numerical method of aerodynamic calculations of low speed flow is established. The flow field over the low-speed prolate spheroid and the aerodynamics of which are both calculated. The pressure and tangential stress coefficients are accordant to the experiment result in open literature. The meshes around the terminal-sensitive ammunition (TSA) are generated, and the flow field is numerical simulated. The speed-up ratio and the parallel efficiency are both tested, and the result is gratifying. The computational aerodynamic force accords with the experimental data. The comprehensive result shows, that the numerical method proposed is able to calculate the flow field and aerodynamic force of the low speed projectile, and guarantee the design of the aerodynamic figure of new projectiles. |
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