Abstract
The hypersonic MHD flow over rotation body with imbedded magnetic dipole is usually characterized by formation of extensive separation zones with practically motionless medium. The position of these zones at the body surface and their size strongly depend on and are controlled by the direction and value of the dipole magnetic moment. The gasdynamic streamlines bypass the separation zone following close to the magnetic lines of force. The surface heat flux inside this zone is markedly reduced. It is of interest to consider the possibilities of additional heat protection of the body surface by a cold gas pulse injection to the separation zones, which look quite stable with regard to external impacts. This is the problem considered in the present paper by means of the numerical modeling. The calculations have been performed in the framework of the complete MHD model taking into account viscosity, thermal conductivity, induced magnetic field, and real-air thermodynamic properties. It has been revealed that the pulse injection of cold gas into the separation zone leads to cooling of this zone and the corresponding decrease of the total heat flux. The effect persists for a long time after the injection termination. It is also noted that this effect does not depend on the separation zone location but manifests itself more intensively in the case of the injection into the separation zone in the shock layer.
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References
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Acknowledgments
The work was carried out with financial support from the Russian Foundation for Basic Research (Project No. 15-08-01687).
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Gubanov, E., Likhachev, A., Medin, S. (2017). Pulse Gas Injection in Separation Zone of Hypersonic MHD Flow Over Rotation Body. In: Ben-Dor, G., Sadot, O., Igra, O. (eds) 30th International Symposium on Shock Waves 2. Springer, Cham. https://doi.org/10.1007/978-3-319-44866-4_2
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DOI: https://doi.org/10.1007/978-3-319-44866-4_2
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