Heat Flux to the Cylinder Surface at the Three-Dimensional Perturbations of Supersonic Flow

Three dimensional vortex modes of hypersonic steady-state flow on the blunted bodies leading age

“…For example, in 6 it was asserted that, in case of homogeneous hypersonic flow, only a plane (homogeneous in the transverse coordinate Z) flow exists in a stationary state on the frontal surface of a cylinder, which is considered the "correct" solution of gas dynamic equations. And the appearance of time-undamped three-dimensional vortex structures in calculations (so called "incorrect" solutions) is related exclusively to the mechanism of numerical errors generated by either insufficient grid resolution near the shock wave front, or by the exciting effect of boundary conditions of symmetry imposed on Z-extreme cross-sections of the calculation domain.…”

“…Since confirmation of the physical basis of vortex flow mode is of fundamental importance, it was decided to continue numerical investigations, paying close attention to the limitations of calculation methods noted by the opposing side 6 . Thus, one aim of the present study is to simulate three-dimensional vortex modes of a hypersonic flow past bodies with cylindrical frontal bluntness, to test the effect of boundary conditions in Z-extreme crosssections of the calculation domain, and to verify the obtained results by increasing grid density and referring to wellknown analytical solutions.…”