Abstract
The work presents a method of complex investigation of thermal radiation emitted by heterogeneous combustion products in the model rocket engine plume. Realization of the method has allowed us to obtain full information on the results in all stages of calculations. Dependence of the optical properties (complex refractive index), the radiation characteristics (coefficients and cross sections) and emission characteristics (flux densities, emissivity factors) of the main determining factors and parameters was analyzed. It was found by the method of computational experiment that the presence of the gaseous phase in the combustion products causes a strongly marked selectivity of emission, due to which the use of gray approximation in the calculation of thermal radiation is unnecessary. The influence of the optical properties, mass fraction, the function of particle size distribution, and the temperature of combustion products on thermal radiation in the model rocket engine plume was investigated. The role of "spotlight" effect–increasing the amount of energy of emission exhaust combustion products due to scattering by condensate particles radiation from the combustion chamber–was established quantitatively.
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Kuzmin, V., Maratkanova, E., Zagray, I. et al. Thermal radiation of heterogeneous combustion products in the model rocket engine plume. Thermophys. Aeromech. 22, 371–386 (2015). https://doi.org/10.1134/S0869864315030129
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DOI: https://doi.org/10.1134/S0869864315030129