气泡雾化下游场液滴速度的预测模型研究  

Study of a Model for Predicting the Liquid Drop Velocity in the Lower Reaches of a Flow Field Under the Effervescent Atomization

作　　者：方恒和[1] 谢晶[1] 刘猛[2] 

机构地区：[1]上海海洋大学食品学院,上海201306 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《热能动力工程》2013年第2期150-153,216-217,共4页Journal of Engineering for Thermal Energy and Power

基　　金："十二五"国家支撑计划基金资助项目(2012BAD38B09);上海市科委工程中心建设基金资助项目(11DZ2280300)

摘　　要：为了预测气泡雾化下游场液滴的速度,借助修正的局部均匀流动模型(locally homogenous flow,LHF),建立了针对气液两相雾化下游场液滴速度的预测模型,并且与采用激光多普勒粒度仪(Phase Doppler Particle Analyzer,PDPA)测得的气泡喷嘴下游雾场液滴的速度进行了对比。结果表明,当气泡喷嘴下游稀相区液滴粒径沿着径向变化不大并且液滴粒径与速度不相关时,采用修正的LHF模型能够预测雾化下游场的液滴速度。随着雾炬轴向距离的增加,在雾化中心和边缘处液滴速度的预测值与实验值越来越接近。To predict the liquid drop velocity in the lower reaches of a flow field under the effervescent atomization,established was a model for predicting the above-mentioned liquid drop velocity under the gas-liquid two-phase flow atomization with the help of a corrected local homogenous flow(HLF) model and compared was the velocity such obtained with that measured by using a laser Doppler particle analyzer(PDPA).It has been found that when the particle diameter of the liquid drop in the sparse phase zone along the radial direction has little change and is irrelative to the particle velocity,the corrected LHF model can predict the liquid drop velocity in the lower reaches of the flow field atomized.With an increase of the axial length of the mist torch,the predicted values of the liquid drop velocities in both atomization center and rim are more and more close to the test values.

关 键 词：气泡雾化 液滴速度 预测模型 

分 类 号：O359[理学—流体力学]