气液同轴自激振荡式雾化喷嘴设计与流场分析  

Design and Research on Flow Field of Gas-liquid Coaxial Self-excited Oscillating Atomization Nozzle

作　　者：汪朝晖[1,2] 潘正江 曾立 高全杰 邓晓刚 WANG Zhaohui;PAN Zhengjiang;ZENG Li;GAO Quanjie;DENG Xiaogang(Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China;Department of l~Iechanical and Power Engineering, Chongqing University of Science and Technology, Chongqing 401331,China)

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,武汉430081 [2]武汉科技大学机械传动与制造工程湖北省重点实验室,武汉430081 [3]重庆科技学院机械与动力工程学院,重庆401331

出　　处：《机械设计与研究》2018年第2期103-107,共5页Machine Design And Research

基　　金：国家自然科学基金资助项目(51405352,51376204)

摘　　要：利用气液两相作用力和自激振荡效应产生的脉冲压力能够有效提高喷嘴雾化效果。基于气液二相流原理和自激振荡脉冲射流发生机理,将气液二相流原理和自激振荡雾化效应相结合,创新性地提出了气液同轴自激振荡式喷雾方式,设计出了气液同轴自激振荡式雾化喷嘴模型,并分析了新型喷嘴的射流脉动效果和雾化性能。研究结果表明：增加气液同轴后自激振荡雾化喷嘴内部的能量聚集与释放相比以前更加稳定;在相同条件下,相比原始自激振荡雾化喷嘴,气液同轴自激振荡雾化喷嘴出口轴线上速度脉动增长大约13.9%~31%,出口平均速度峰值提高了约24.3%,流场内部气相体积分数增长约23%~30%;气液同轴自激振荡雾化喷嘴内空化现象明显,流场内的紊流和扰动剧烈,具有良好的雾化性能。The gas-liquid two-phase force and the pulse pressure generated by the self-oscillation effect can effectively improve the nozzle atomization effect. Based on the principle of gas-liquid two-phase flow and the mechanism of self-excited oscillation pulsed jet,combining the principle of gas-liquid two-phase flow and the self-excited oscillating atomization effect,the gas-liquid coaxial self-excited oscillating atomizing nozzle model is designed and the jet pulsation effect and atomization performance of the new nozzle are analyzed. The results show that the energy accumulation and release of the self-excited oscillating atomizing nozzle after gas-liquid coaxial are more stable than before. Under the same conditions,and compared to the original self-excited oscillation atomization nozzle,the speed of the export axis of gas-liquid coaxial self-excited oscillation atomizing nozzle increased by about 13.9%to 31%; the average peak speed of exports increased by about 24.3%; the volume fraction of gas flow inside the flow field increases by about 23% ~ 30%; the gas-liquid coaxial self-excited oscillation atomizing nozzle have good atomization performance,because the cavitation inside the flow field is obvious,and the turbulence and disturbance in the flow field are intense.

关 键 词：气液同轴 自激振荡 雾化喷嘴 流场分析 

分 类 号：TH122[机械工程—机械设计及理论]