中空压力旋流喷嘴内流场特性研究Research on the Inner Flow Field of a Hollow Cone Pressure Swirl Nozzle
王晓琦,尹俊连,张海平,仇性启
WANG Xiao-qi,YIN Jun-lian,ZHANG Hai-ping,QIU Xing-qi (China University of Petroleum
摘要(Abstract):
针对切向进液的压力旋流喷嘴,利用实验测量结合数值模拟的方法研究其内流场特性。采用高速摄像仪跟踪记录并测量内部空气心和外部雾化锥角大小;采用LDV激光测试系统测量出口速度场。由此对比验证了VOF多相流模型、RNGκ-ε湍流模型适用于此类旋流喷嘴数值模拟计算。随后分析得到喷嘴内部不同截面的压力场、密度场和速度场分布图;拟合准势流区和似固体区切向速度沿23mm截面半径变化关系式,所得结果对解释旋流喷嘴内部流场形态提供参考依据。
Computational fluid dynamics,high-speed camera and LDV System are combined to simulate and test the inner flow field of a hollow cone pressure swirl nozzle so as to verify Volume-of-Fluid simulation method on this type of nozzle.Moreover,the processed results show fields of pressure,density and velocity.Tangential velocities regression equations on areas of sub-potential flow and similar solid region are also matched.So the study offers meaningful reference for expressing inner flow situation of swirl nozzle
关键词(KeyWords):
旋流喷嘴;空气心;FLUENT
swirling nozzle;air core diameter;FLUENT
基金项目(Foundation):
作者(Author):
王晓琦,尹俊连,张海平,仇性启
WANG Xiao-qi,YIN Jun-lian,ZHANG Hai-ping,QIU Xing-qi (China University of Petroleum
参考文献(References):
- [1]Nonnenmacher S,Piesche M.Design of hollow conepressure swirl nozzles to atomize Newtonian fluids[J].Chemical Engineering Science,2000,(55):4339-4348.
- [2]Halder 1 M R,Dash S K,Som S K.Initiation of aircore in a simplex nozzle and the effects of operatingand geometrical parameters on its shape and size[J].Experimental Thermal and Fluid Science,2002,(26):871?878.
- [3]Jeng S M,Jog M A,Benjamin M A.Computationaland Experimental Study of Liquid Sheet Emanatingfrom Simplex Fuel Nozzle[J].AIAA Journal,1998,36(2):201-207.
- [4]Halder 1 MR,Dash S K,Som S K.A numerical andexperimental investigation on the coefficients of dis-charge and the spray cone angle of a solid cone swirlnozzle[J].Experimental Thermal and Fluid Science,2004,(28):297?305.
- [5]Jose A.Delgadillo,Raj K.Rajamani.A comparativestudy of three turbulence-closure models for the hydro-cyclone problem[J].Int.J.Miner.Process,2005,(77):217?230.
- [6]Jose A.Delgadillo,Raj.K.Rajamani.Multiphasemodelling of hydrocyclones-prediction of cut-size[J].Minerals Engineering,2007,(20):395?406.
- [7]沈忠厚.水射流理论与技术[M].东营:石油大学出版社,1998.