Navier-Stokes flow simulations around HOPE-X (H-2 Orbiting Plane Experimental) have been carried out to yield various useful data for its aerodynamic design. In this paper, two kinds of validation studies for the flow simulations are reported. First, the code to code validation was executed to test the reliability of the CFD (Computational Fluid Dynamics) codes. The two CFD codes used here are both based on the Reynolds averaged thin layer approximated Navier-Stokes equations which are made discrete by the finite volume method with a TVD (Total Variation Diminishing) upwind scheme. The results obtained by these codes are in good agreement with each other at angle of attack lower than ten degrees. Second, flow simulations by one CFD code with different two grids were executed to estimate the grid dependence of the code. Grid dependence is small enough to use the CFD code for aerodynamic design.
HOPEの遷・超音速流空力設計CFD解析
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