Development and application of three-dimensional skeleton models of gas-permeable high-porosity materials for supersonic aerodynamics.

The paper describes the results of using various three-dimensional skeleton models of a high-porosity medium for numerical simulation of a supersonic (M∞ = 7) flow around a cylinder with a frontal gas-permeable porous insert; the cylinder is aligned at different angles of attack. Numerical simulation is performed by solving three-dimensional Reynolds-averaged Navier-Stokes equations using six skeleton models: ring model, toroidal model, models composed of intersecting and non-intersecting hollow spheres, and models composed of non-intersecting solid spheres with a regular and random arrangement. The drag coefficient of the cylinder with the frontal gas-permeable high-porosity insert is compared with the results of experiments performed in the T-327 wind tunnel based at the Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences. Based on the comparative analysis of results obtained using different models, the toroidal model of gas-permeable cellular-porous materials is chosen as an optimal model for computing a supersonic flow around a body with a frontal porous insert. [ABSTRACT FROM AUTHOR]