微推力器柱阵列加热室流动和换热特性研究  

Study on flow and heat transfer characteristics of heating chamber with column pin-fin array for micro-thruster

作　　者：范匆 王长辉[1] 曹熙炜 FAN Cong;WANG Changhui;Cao Xiwei(School of Astronautics, Beihang University, Beijing 100076, China;Beijing Aerospace Systems Engineering Research Institute,Beijing 100191, China)

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]北京宇航系统工程研究所,北京100076

出　　处：《火箭推进》2018年第3期23-29,共7页Journal of Rocket Propulsion

摘　　要：针对丁烷自增压微推力器,设计了微型圆柱阵列结构加热室,通过数值模拟的方法研究了给定加热功率,不同的加热室入口压力下,微柱阵列排列结构对加热室内丁烷气体的流动和换热特性以及微推力器性能的影响。结果表明,微柱阵列的存在明显的提升了加热室换热特性和推力器性能,微柱阵列引起的加热室压力损失很小。相同的排列密度下,采用错排列结构微柱阵列的推力器整体性能更优。微柱阵列的排列密度越大,微推力器加热室换热特性和性能越好。当微柱阵列采用错排列结构时,排列密度增至一定程度后推力器性能不再提升。A heating chamber with micro column pin-fin array structure was designed for the butane self-pressurized micro-thruster. Under the given heating power and the different inlet pressure of heating chamber,the effects of micro-column pin-fin arrangement structure on the flow and heat transfer characteristic of butane gas in the heating chamber were studied by numerical simulation as well as the propulsion performance of the micro-thruster. The results show that the micro-column pin-fin array can significantly increase the heating efficiency of heating chamber and thruster performance,while its pressure loss at the heating chamber is quite small. Under the same arrangement density,the thruster with a staggered pin-fin arrangement has better overall performance. The more the arrangement density is,the better the heat transfer characteristics and propulsive performance of the micro-thruster become. However,when the staggered arrangement is adopted for the micro-column array,the thruster performance is not further improved once the arrangement density increases to a certain degree.

关 键 词：微推力器 柱阵列加热室 气体流动 换热特性 数值模拟 

分 类 号：V434-34[航空宇航科学与技术—航空宇航推进理论与工程]