Stability of Supersonic Boundary Layer on the Sublimation Surface
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Theoretical investigation of the supersonic flat-plate boundary-layer properties under conditions of the surface material sublimation has been performed for Mach number M = 2. Naphthalene (C10H8) was chosen as the substance for the sublimation coating. Performed computations show that with increasing surface temperature due to stagnation temperature increase, the mass flow rate of naphthalene evaporation increases. Calculations performed on the basis of linear stability theory show that such an increase of evaporation leads to a noticeable decrease of the local growth rates of unstable perturbations in the boundary layer. It is found that stabilization of the boundary layer by the surface coating sublimation occurs with increasing temperature of the sublimation coating, reaching a maximum near the triple point temperature of the sublimation material. The carried out experiments confirmed the stabilizing effect of surface sublimation.
Keywords
supersonic boundary layer, hydrodynamic stability, laminar-turbulent transition, binary gas mixture, sublimation
Funding
The research was performed within the framework of the Program of Fundamental Scientific Research of Russian state academies of sciences in 2013-2020 (project АААА-А17-117030610125-7 No. 0323-2019-0009: experiment preparation; АААА-А17-117030610126-4 No. 0323-2019-0006: experiment carrying out) and was also supported by Russian Foundation for Basic Research (project No. 18-01-00070a: theory). The research was performed in ITAM SB RAS on the equipment of the Center of Collective Use “Mechanics”.
УДК 532.526
Stability of Supersonic Boundary Layer on the Sublimation Surface (RUS)
0000-0003-0209-6299 The material was received by the Editorial Board: 03.02.2020
Abstract Theoretical investigation of the supersonic flat-plate boundary-layer properties under conditions of the surface material sublimation has been performed for Mach number M = 2. Naphthalene (C10H8) was chosen as the substance for the sublimation coating. Performed computations show that with increasing surface temperature due to stagnation temperature increase, the mass flow rate of naphthalene evaporation increases. Calculations performed on the basis of linear stability theory show that such an increase of evaporation leads to a noticeable decrease of the local growth rates of unstable perturbations in the boundary layer. It is found that stabilization of the boundary layer by the surface coating sublimation occurs with increasing temperature of the sublimation coating, reaching a maximum near the triple point temperature of the sublimation material. The carried out experiments confirmed the stabilizing effect of surface sublimation.
Keywords
supersonic boundary layer, hydrodynamic stability, laminar-turbulent transition, binary gas mixture, sublimation
Funding
The research was performed within the framework of the Program of Fundamental Scientific Research of Russian state academies of sciences in 2013-2020 (project АААА-А17-117030610125-7 No. 0323-2019-0009: experiment preparation; АААА-А17-117030610126-4 No. 0323-2019-0006: experiment carrying out) and was also supported by Russian Foundation for Basic Research (project No. 18-01-00070a: theory). The research was performed in ITAM SB RAS on the equipment of the Center of Collective Use “Mechanics”.
УДК 532.526
Stability of Supersonic Boundary Layer on the Sublimation Surface (RUS) References: Lysenko V. I., Gaponov S. A., Smorodsky B. V., Kosinov A. D., Yaroslavtsev M. I. Stability of Supersonic Boundary Layer on the Sublimation Surface. Siberian Journal of Physics . 2020, vol. 15, no. 1. P. 42–61. (in Russ.). DOI: 10.25205/2541-9447-2020-15-1-42-61