Scaling effects on combustion modes in a single-side expansion kerosene-fueled scramjet combustor  

作　　者：Fan LI Mingbo SUN Jiajian ZHU Zun CAI Hongbo WANG Yanxiang ZHANG Yongchao SUN 

机构地区：[1]Science and Technology on Scramjet Laboratory,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Journal of Aeronautics》2021年第5期684-690,共7页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11925207,11902353 and 91741205);the Foundation of Innovation-oriented Province Construction of Hunan(No.2019RS2028)。

摘　　要：The combustion modes in two different scramjet combustors with the mass flow rates of 1.8 kg/s and 3.6 kg/s are experimentally investigated to explore the scaling effects on supersonic combustion with a Mach number 2.0 inflow.It is found that the scramjet combustor with a larger scale can broaden the flame rich blowout limit.As the Equivalence Ratio(ER)increases,the combustion in the small-scale combustor maintains in the cavity-stabilized mode,and the flamebase moves downstream along the cavity shear layer;however,the combustion in the large-scale combustor gradually transfers from the cavity-stabilized mode to the jet-wake-stabilized mode.The differences in the cavity residence time,the ignition delay time and the Damkohler number caused by different scales of the scramjet combustor are likely to account for the scaling effects on the combustion modes.

关 键 词：Cavity COMBUSTION Combustion stabilized mode Scaling effect SCRAMJET SUPERSONIC 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]