Flow control mechanism of sprays using dual synthetic jets  

作　　者：Wei HE Songjiang FENG Zhenbing LUO Lurui XIA Xiong DENG Sen LI Sheng XU 

机构地区：[1]Space Engingeering University,Beijing 101400,China [2]College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Journal of Aeronautics》2025年第3期1-17,共17页中国航空学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.U2341202,12402333).

摘　　要：Dual Synthetic Jets (DSJ) can directly affect the development of spray through the complex vortex structure. The mechanism of flow control on spray and its thermal management application are studied by combining experiment and simulation. The spray characteristics under different injection angles are studied, and the results show that the angle should be controlled in the range of 45°–60°, so that sufficient momentum transfer can be obtained, and meanwhile spray impingement area narrowing can be avoided. The spray characteristics under flow control of DSJ with different Reynolds numbers are studied, and the results show that Reynolds number should be controlled in the range of 2859–3574, so that strong particle streamwise acceleration and wall film disturbing can be achieved. In addition, the DSJ kinetic energy is utilized more efficiently. On the basis of previous research, this paper proposes a novel active heat pipe based on spray controlled by DSJ. The space occupancy has been reduced by more than 60%. Even in a sealed state, the active heat pipe is able to cool a hot surface with heat flux of 22.2 kW/m^(2) from 111℃ to 57℃ only in 20 s. The noise of DSJ is reduced from 85 dB to 60 dB, which is expected to promote the practical application of DSJ in thermal management.

关 键 词：Dual synthetic jets Fow cantrol Spray cooling Heat pipe Piezoelectric atomizer Heat transfer enhancerment 

分 类 号：TK124[动力工程及工程热物理—工程热物理]