基于多孔介质模型的折波式液氧过滤器压降仿真分析  

The Hydraulic Resistance Calculation by the Simulation Based on the Full Porous Model

作　　者：纪晶晶 黄玲艳[1] 刘海飞[1] 唐强[1] Ji Jing-jing;Huang Ling-yan;Liu Hai-fei;Tang Qiang(Beijing Institute of Space Launch Technology,Beijing,100076)

机构地区：[1]北京航天发射技术研究所

出　　处：《导弹与航天运载技术》2019年第4期88-92,共5页Missiles and Space Vehicles

基　　金：国家自然科学基金项目(11602014)

摘　　要：液氧过滤器是运载火箭低温加注系统的重要组成部分。为提高过滤器滤芯的耐压能力,将常规使用的单层滤网改进为多层折波滤网,进行了过滤器压降试验。为了深入分析改进后过滤器的压降特性及内部流动规律,采用多孔介质模型开展滤芯区域的流场数值计算、压降评估,仿真结果与试验结果吻合较好。仿真结果显示:正向流动时,改进前过滤器1中滤芯部分平均压降为2.16 kPa,占整体压降的比值均值为8.34%;改进过滤器2滤芯部分压降为15.72 kPa,占整体压降的比值为30.83%,均高于改进前水平。该数值计算方法可准确预报过滤器压降特性,为进一步改进提供了理论依据。Filter plays an important role in the infusion of low-temperature propellant used for the launch vehicle. To increase the structural strength of the filter, the single layer is improved as three folded layers. However, the change of hydraulic resistance from filter would influence the whole infusion system. In this study, the full porous model is proposed to calculate the hydraulic resistance. It is found that the simulation results agreed well with the experimental data. This method can accurately predict the pressure difference through the porous strainer, which provides the theoretical support for the improvement of filter.

关 键 词：低温加注 过滤器 多层折波滤芯 多孔介质 

分 类 号：V554.4[航空宇航科学与技术—人机与环境工程]