空间辐射散热器含液滴介质的辐射特性和辐射传热

RADIATIVE PROPERTIES AND HEAT TRANSFER OF A DROPLET FILLED LAYER IN SPACE RADIATOR

本文从米氏电磁散射理论出发， 计算了含液滴介质的辐射特性。考察了各向同性散射能量传递份额的再分配， 导出了吸收、发射、各向同性散射介质的辐射传递系数。计算了空间辐射散热器液滴层瞬态辐射换热， 经与文献 ［４， ５］ 的比较表明， 本文所导出的辐射传递系数计算方法正确， 精度高。用计算机辅助实验， 分析液滴发生器产生粒子的大小、粒径分布对瞬态辐射换热的影响， 可减少空间辐射散热器设计过程中的实验次数。

The radiative properties of a droplet filled layer are calculated by using the Mie scattering theory in this paper.The redistribution of radiative energy in the case of isotropic scattering is investigated,and the radiative transfer coefficient (RTC) in an absorbing,emitting and isotropic scattering medium is derived.The transient radiative heat transfer of a droplet filled layer in space radiator is solved.Then the validity and high precision of the formula for the RTC are confirmed by comparing with references [4,5].Finally,the effects of size or size distribution of droplet,which are created by generator,on the transient coupled heat transfer are analyzed by means of computer aided experiment,so the numbers of experiment can be reduced in design of space radiator.