同轴离心式单、双喷嘴喷雾特性对比实验  

Comparative experimental of spray characteristics for gas liquid coaxial swirl single and double injectors

作　　者：康金鑫 仝毅恒 高玉超 谢家豪 郭康康 丰松江 KANG Jinxin;TONG Yiheng;GAO Yuchao;XIE Jiahao;GUO Kangkang;FENG Songjiang(Space Engineering University,Beijing 101416,China)

机构地区：[1]航天工程大学,北京101416

出　　处：《火箭推进》2023年第6期38-45,共8页Journal of Rocket Propulsion

基　　金：国家自然科学基金(12002386)。

摘　　要：对液体中心型同轴离心式单、双喷嘴喷雾特性开展了实验研究。采用高速摄影捕捉瞬态喷雾过程,通过Matlab程序获取了相应雾化锥角并与单喷嘴进行对比;采用激光粒度仪测量了双喷嘴近场区域液雾索泰尔平均直径(Sauter mean diameter,SMD),借此分析了单喷嘴与双喷嘴雾化锥角产生差异的机理。结果表明:随着气液比的增大,双喷嘴较单喷嘴的雾化锥角增加;双喷嘴间形成的复杂湍流区致使喷嘴间索泰尔平均直径小于喷嘴外侧;喷嘴间粒径较小,易受到湍流区的卷吸作用,致使两喷嘴内侧喷雾锥角增大。Presents an experimental study of the spray characteristics of liquid-centred coaxial swirl single and double injectors.High-speed photography was applied to capture the transient spray process and the corresponding atomization cone angles were obtained by a Matlab program and compared with a single injector.And a laser particle analyzer was used to measure the Sauter mean diameter(SMD)in the near-field region of the dual injectors,which was used to analyze the variation mechanism in the atomization cone angle between the single and dual injectors.The results shows that with the increase of vapor liquid ratio,the atomisation cone angle of the double injectors increases compared to the single injector.The complex turbulence zone formed between the double injectors results in the sauter mean diameter between the injectors being smaller than the outer side of the injector.The smaller particle size between the injectors is susceptible to the winding and sucking effect of the turbulence zone,resulting in an increase in the spray cone angle inside the double injectors.

关 键 词：液体中心型 同轴离心式喷嘴 SMD 雾化锥角 双喷嘴 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]