典型文献
Experimental and theoretical study on the break phenomenon of self-pulsation for liquid-centered swirl coaxial injectors
文献摘要：
Experimental observations together with theoretical analysis were conducted to investigate the break phenomenon and the corresponding mechanisms of self-pulsation for a liquid-centered swirl coaxial injector with recess number of RN=1. Instantaneous spray images were obtained based on background light imaging technology with a high-speed camera. By dynamic analysis of the flow process of the liquid sheet in the recess chamber, a 1D self-pulsation theoretical model was established, and the self-sustaining mechanisms of self-pulsation were analyzed in depth. The results show that the increase of the momentum flux ratio will lead to the occurrence of the break phenomenon of self-pulsation for the injector with a larger recess length, and the frequency and intensity of self-pulsation before and after the break phenomenon differ significantly. The flow dynamics in the recess chamber sequentially transform from a periodic expansion-dominated flow to a stable flow, and then develop to a periodic contraction-dominated flow during the break process of self-pulsation. With the occurrence of self-pulsation before the break phenomenon, the liquid sheet has little effect on the pressure disturbance in the recess chamber. In contrast, with the occurrence of self-pulsation after the break phenomenon, the pressure disturbance is obviously affected by the liquid sheet. Based on the theoretical analysis model of self-pulsation, the self-pulsation frequency can be predicted. Furthermore, the self-sustaining mechanism of self-pulsation before and after the break phenomenon is preliminarily confirmed. The energy transfer between the gas-and liquid-phase is an important factor for maintaining the self-pulsation process.
文献关键词：
中图分类号：
作者姓名：
Peng-jin CAO;Xiao BAI;Qing-lian LI;Peng CHENG
作者机构：
Science and Technology on Scramjet Laboratory,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China
文献出处：
引用格式：
[1]Peng-jin CAO;Xiao BAI;Qing-lian LI;Peng CHENG-.Experimental and theoretical study on the break phenomenon of self-pulsation for liquid-centered swirl coaxial injectors)[J].浙江大学学报（英文版）（A辑：应用物理和工程）,2022(02):140-155
A类：
B类：
Experimental,theoretical,study,break,phenomenon,self,pulsation,liquid,centered,swirl,coaxial,injectors,observations,together,analysis,were,conducted,investigate,corresponding,mechanisms,recess,number,RN,Instantaneous,spray,images,obtained,background,light,imaging,technology,high,speed,camera,By,flow,process,sheet,chamber,1D,model,was,established,sustaining,analyzed,depth,results,show,that,increase,momentum,flux,ratio,will,lead,occurrence,larger,length,frequency,intensity,before,after,differ,significantly,dynamics,sequentially,transform,from,periodic,expansion,dominated,stable,then,develop,contraction,during,With,little,effect,pressure,disturbance,contrast,obviously,affected,by,Based,predicted,Furthermore,preliminarily,confirmed,energy,transfer,between,gas,phase,important,maintaining
AB值：
0.405869
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
