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首页> 外文期刊>Russian Aeronautics >AIRCRAFT AND ROCKET ENGINE THEORY: DIFFUSIVE BOUNDARY CONDITIONS IN THE EQUATION OF RADIATION ENERGY TRANSFER
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AIRCRAFT AND ROCKET ENGINE THEORY: DIFFUSIVE BOUNDARY CONDITIONS IN THE EQUATION OF RADIATION ENERGY TRANSFER

机译：飞机和火箭发动机理论：辐射能转移方程中的扩散边界条件

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摘要

We present an exact concept of diffusive boundary conditions in the equation of radiation energy transfer for dispersed and homogeneous media. We give an algorithm of the numerical realization of boundary conditions in the transfer equation solution. In two-phase combustion products of mixed fuels the radiation transfer to a heat protecting surface and a charge in many cases is a basic kind of heat exchange. The density of thermal radiative flows q{sub}r in such media amounts to 4.0 MW/m{sup}2. In homogeneous media that are a uniform one for the thermal radiation, the radiation transfer exerts some influence on the course of inter-chamber processes. As the radiation transfer is of an instantaneous character, it plays a significant part in the processes of ignition and the initial period of fuel combustion. The density of radiative thermal flows depends on the volume geometry and in the homogeneous media (for example, in GTE annular combustion chambers) may amount to 1.0 MW/m{sup}2 and more.
机译：在分散和均匀介质的辐射能转移方程中，我们提出了扩散边界条件的精确概念。我们给出了传递方程解中边界条件数值实现的算法。在混合燃料的两相燃烧产物中，辐射传递到热保护表面，在许多情况下，电荷是基本的热交换类型。在这种介质中的热辐射流的密度q {sub} r为4.0 MW / m {sup} 2。在均匀的热辐射介质中，辐射传递对腔间过程的过程产生一些影响。由于辐射传递具有瞬时特性，因此它在点火过程和燃料燃烧的初期起着重要作用。辐射热流的密度取决于体积的几何形状，并且在均匀介质中（例如，在GTE环形燃烧室中）可以达到1.0 MW / m {sup} 2或更高。

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