Analysis of Micro-scale Flame Structure of AP/HTPB Base Bleed Propellant Combustion

作     者：Rui YE Yong-gang YU Yong-jie CAO 

作者机构：School of Energy and Power Engineering Nanjing University of Science and Technology 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2013年第9卷第4期

页      面：217-223页

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the financial support provided by the National Natural Science Foundation of China(No.51176076) 

主　　题：推进剂燃烧 火焰结构 HTPB 结构分析 AP 底排 化学反应速率 Peclet数 

摘      要：A complex multiple flame structure is formed during the combustion of AP/HTPB base bleed *** AP monopropellant flame is concentrated in a thin zone above the burning surface of AP crystal to maintain self-sustained *** to the low temperature near the burning surface,the diffusion between the decomposition products of AP and the pyrolysis products of HTPB occurs,and a partly pre-mixed diffusion flame structure-leading edge flame(LEF)is *** effects of pressure,chemical reaction rate and AP particle size on diffusion flame structure in the range from 20 atm to 100 atm are *** Peclet number increases from 6.64 at 20 atm to 21.91 at 100 atm when AP particle size is 140 *** high temperature zone is blown away from the burning surface because the convective transport rate increases with the increase in Peclet *** chemical reaction rate is enhanced and the diffusion mixing is inhibited as Damkohler number *** chemical heat release is more concentrated and the chemical reaction zone becomes narrow when Damkohler number changes from 330 at20 atm to 4700 at 100 *** AP particle diameter is decreased to 60 mm,the diffusion time scale is reduced due to the reduced diffusion length *** the diffusion mixing is enhanced and a more pre-mixed flame is *** burning rate increases because the more pre-mixed heat release increases the heat feedback to the HTPB binder.