遷音速ならびに超低速の非定常凝縮流れの数値解析(OS23c 相変化・超臨界流体の計算力学)

概要

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Unsteady transonic flows and unsteady flows at very low Mach number with condensation are numerically. Investigated by using the preconditioned Roe scheme and the preconditioned LU-SGS scheme based on the preconditioning method and the condensation model. The present method is certainly applicable to the unsteady transonic flows. On the other hand, the unsteady flows at very low Mach number calculated by the preconditioning method should be carefully validated because of the artificial compressibility in the preconditioning method. In this paper, unsteady flows at very low Mach number around a circular cylinder with and without condensation are calculated and the unsteady results are compared with the existing experimental data. Finally, the extensity of the present method to the unsteady flow problems is discussed.
2004-11-17