火箭推进2018，Vol.44Issue(2)：18-22,5.
火箭冲压组合发动机部件缩尺关系理论初探
Theoretical analysis on scaling relation of components for rocket ramjet combined engine
摘要
Abstract
Based on the operating principle of each component for rocket ramjet combined engine, the scaling relation of components for rocket ramjet combined engine was theoretically analyzed,and the scaling relation between the components of small size engine and midsize engine or large size engine was established to make the test results of small size rocket ramjet combined engine support the development of large size engine.The analysis results show that the scaling relation of the hydrocarbon fueled rocket ramiet combined engine is different from the pressure-length scaling relation of hydrogen fueled scramjet engine;the scaling relation of all the components for the two kinds of engines is obviously different;geo-metric scaling relation can be adopted for the intake and exhaust system;the scaling of isolator,fuel in-jectors and flame stabilizing device abides by different scaling relation;the penetration depth of liquid fu-el is linear relation with engine size, but the atomization and evaporation of liquid fuel has no relation with engine size;the scaling of thrust chamber can be realized by changing the number of thrust chambers according to the scale factor.关键词
火箭冲压组合发动机/缩尺关系/碳氢燃料/发动机尺度Key words
rocket ramjet combined engine/scaling relation/hydrocarbon fuel/engine size分类
航空航天引用本文复制引用
杜泉,付秀文..火箭冲压组合发动机部件缩尺关系理论初探[J].火箭推进,2018,44(2):18-22,5.基金项目
国家863项目(2014AA7023026) （2014AA7023026）
