Numerical analysis on combustion characteristics of hybrid rocket motor with star-tube segmented grain

作     者：Chengen LI Zongwei WANG Jin YANG Jinpeng JIANG Fan GONG Zhu LIU Yu SUN Chengen LI;Zongwei WANG;Jin YANG;Jinpeng JIANG;Fan GONG;Zhu LIU;Yu SUN

作者机构：Science and Technology on Space Physics LaboratoryBeijing 100076China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第12期

页      面：102-112页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 082502[工学-航空宇航推进理论与工程] 0807[工学-动力工程及工程热物理] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

主　　题：Combustion performance Flow fields Fluid-solid coulping Hybrid rocket motor Star-tube segmented grain 

摘      要：A method of star-tube combined segmented grain is proposed to improve the combustion performance of hybrid rocket *** star-tube combined segmented grain consists of a single-port star part and a single-port tube part.A mid-chamber forms between the fore-grain and the aft-grain for better mixing *** single-port feature gives hybrid rocket motor several advantages,such as simple structure,high reliability,and variable *** paper is mainly aimed at studying the combustion characteristics of hybrid rocket motor with star-tube segmented grain through three-dimensional steady *** performance of the motors with different segmented grain combinations,including fore-tube/aft-tube,fore-tube/aftstar,fore-star/aft-star and fore-star/aft-tube,is contrastively *** motor in this paper adopts polyethylene and 90%hydrogen peroxide as the *** reveal that segmented grain with different-type grain combinations could greatly change the flow field in the second half of the combustion *** of the flow field is beneficial to the mixing between the fuel and the oxidizer,and it could increase the fuel regression rate and the combustion *** turbulence effect of tube aft-grain is better than that of star *** the four segmented grain combinations,the combination of star fore-grain and tube aft-grain is the preferred method with optimal overall *** grain configuration could increase the regression rate of tube aft-grain to surpass that of star aft-grain in other ***,hybrid rocket motor with this grain configuration achieves the highest combustion efficiency.