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Effect of Components of the Thermal Conductivity Tensor of Heat-Protection Material on the Value of Heat Fluxes from the Gasdynamic Boundary Layer

Formalev, V. F. ; Kolesnik, S. A. ; Kuznetsova, E. L.

High temperature, 2019, Vol.57 (1), p.58-62 [Periódico revisado por pares]

Moscow: Pleiades Publishing

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Título:
Effect of Components of the Thermal Conductivity Tensor of Heat-Protection Material on the Value of Heat Fluxes from the Gasdynamic Boundary Layer
Autor: Formalev, V. F. ; Kolesnik, S. A. ; Kuznetsova, E. L.
Assuntos: Anisotropy ; Atoms and Molecules in Strong Fields ; Body temperature ; Boundary layers ; Classical and Continuum Physics ; Composite materials ; Conductive heat transfer ; Exact solutions ; Gas temperature ; Heat and Mass Transfer and Physical Gasdynamics ; Heat conductivity ; Heat flux ; High temperature ; Industrial Chemistry/Chemical Engineering ; Laser Matter Interaction ; Materials Science ; Mathematical analysis ; Physical Chemistry ; Physics ; Physics and Astronomy ; Temperature gradients ; Tensors ; Thermal conductivity
É parte de: High temperature, 2019, Vol.57 (1), p.58-62
Descrição: The effect of components of the thermal conductivity tensor of heat-protection material on heat fluxes from the gas to the body were studied based on the first obtained analytical solution of the problem of heat transfer in anisotropic composite material in conditions of a convective-conductive heat transfer flow around by a high-temperature gasdynamic boundary layer. Such an analysis made it possible to determine a considerable decrease in heat fluxes to the lateral surface of blunted anisotropic body with the use of a heat-protection material with a high degree of longitudinal anisotropy (e.g., pyrolytic graphites, the ratio between the longitudinal and transversal thermal conductivities of which may reach a hundred or more). The main contribution to the decrease in heat fluxes is made by the decrease in the temperature gradient on the gas-body boundary from the gas side at the expense of increased body temperature downstream. In addition, the increased gas temperature on the wall leads to increased dynamic viscosity and decreased density, which decreases the local Reynolds numbers and promotes a decrease in heat fluxes. The numeric results are analyzed.
Editor: Moscow: Pleiades Publishing
Idioma: Inglês

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Effect of Components of the Thermal Conductivity Tensor of Heat-Protection Material on the Value of Heat Fluxes from the Gasdynamic Boundary Layer

Formalev, V. F. ; Kolesnik, S. A. ; Kuznetsova, E. L.

Moscow: Pleiades Publishing

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