Research Institute Ishikawajima-Harima Heavy Industries Co., Ltd.
Research Institute Ishikawajima-Harima Heavy Industries Co., Ltd.
R&D Dept., Aero-Engine and Space Operations Ishikawajima-Harima Heavy Industries Co., Ltd.
R&D Dept., Aero-Engine and Space Operations Ishikawajima-Harima Heavy Industries Co., Ltd.
出版者
航空宇宙技術研究所
出版者（英）
National Aerospace Laboratory(NAL)
雑誌名
航空宇宙技術研究所特別資料
雑誌名(英)
Special Publication of National Aerospace Laboratory SP-7
巻
7
ページ
91 - 98
発行年
1986-12
抄録（英）
A finite-volume calculation method for the solution of two-dimensional incompres-sible time-averaged Navier-Stokes equation in a general curvilinear coordinate system is presented in this paper. The main calculation algorithm of the method is an extension of SIMPLE algorithm to present the governing equations based on curvilinear co-ordinates, maintaining the Cartesian velocity components as dependent variables. The standard k - epsilon turbulence model is used for closure of the Reynolds equation. This method is applied to calculation of turbulent flows in two-dimensional and axi-symmetrical dump diffusers with uniform and distorted inlet velocity profiles. The results are compared with the data obtained from the present experiments and the other available data. The general flow pattern and velocity distribution are successfully predicted and the results show good agreement with experimental data, especially when using the QUICKER scheme for the convection terms approximation. Pressure loss can also be predicted using the fine grid, but improvement must be achieved in the computational method to be able to predict pressure loss with moderate grid. The treatment of the pressure correction equation in general curvilinear coordinates employed in this work enhances the stability and robustness of calculation.
ダンプ・ディフューザの乱流流れ場数値解析
nalsp0007012.pdf
(967.8KB)
