Open AccessNumerical and experimental modelling of MHD interactions at hypersonic flow around blunted body
Author(s) -
T. A. Korotaeva,
В. В. Фомичев,
M. A. Yadrenkin,
E. K. Shipko
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1394/1/012020
Subject(s) - hypersonic speed , magnetohydrodynamics , magnetohydrodynamic drive , mechanics , flow (mathematics) , physics , real gas , shock (circulatory) , aerospace engineering , magnetic field , engineering , medicine , quantum mechanics
The problem of the reducing heat fluxes to the surface of the re-entry capsules when they enter the dense layers of the atmosphere remains an urgent challenge. The purpose of the numerical and experimental study presented in this paper is to check the possibility to decelerate the descent vehicles and reduce the thermal load on their surface in the upper atmosphere using the magnetohydrodynamic (MHD) method. The problem of the flow around a blunt body with a hypersonic air flow (M = 6) is considered when a local MHD interaction is realized near a stagnation point. An experimental study has been carried out at the MHD test rig. The test rig is designed to study the fundamental and applied problems of magnetoplasma aerodynamics. At the experimental simulation the free-flow ionization has been implemented using an electric high-voltage discharge, as distinct from the natural conditions when thermal ionization takes place behind shock waves at the flow hypersonic speeds. Numerical simulation of the flow around a blunt body has been carried out in the framework of Navier-Stokes equation with an approximate specification of the sources of force and heat in the region of MHD interaction. The flow parameters have been defined based on the results of the analysis of experimental data. The Stuart number has been obtained in all experiments that made it possible to establish a correlation between the calculated and experimental data. As a result of the studies, the possibility of changing the flow pattern around the model, the motion of the bow shock wave towards the free flow, and the heat fluxes decrease to the body surface have been demonstrated. It has been shown that, as a result of MHD interaction, the pressure and heat flux decrease about 2 times in the vicinity of the stagnation point where recirculated gas flows occur.