空化喷嘴内部流场的数值模拟  

Numerical Simulation on Internal Flow Field in Cavitating Nozzle

作　　者：杨树人[1] 谭放[1] 张莹[1] 刘姝祺[1] 金淑芹 

机构地区：[1]东北石油大学石油工程学院,大庆163318 [2]大庆采油三厂一矿,大庆163113

出　　处：《科学技术与工程》2010年第33期8329-8332,共4页Science Technology and Engineering

摘　　要：根据喷嘴的结构特点,建立了角形空化喷嘴和风琴管形空化喷嘴的三维结构模型和数值模型,选用RNGk-ε湍流模型,采用SIMPEC算法进行数值计算。结果表明,在空化喷嘴的圆柱段存在速度最大值,射流进入圆柱段后产生明显的负压,与周围介质发生强烈的空化作用,有利于空化气泡的产生。在特定参数下(圆柱段直径d=1mm、圆柱段长度S=3mm、扩散段长度L=8mm、出口扩散角=30°),角形喷嘴的空化效果优于风琴管形喷嘴。Three-dimensional physical model and numerical model are established according to the two nozzle structures,and the κ-ε turbulence model is selected to establish mathematical model,the SIMPEC arithmetic is used for simulation.The results reflect that the cavitating nozzle has the maximum velocity value in the cylindrical section,and the negative pressure is favorable for the cavitations bubble to exist in the cylindrical section because of the intensely shearing action between nozzle and surrounding medium.The cavitating effect of angle-pipe nozzle is superior to organ-pipe nozzle under the specific parameter（the cylindrical section diameter d = 1 mm,the cylindrical section length S = 3 mm,the diffuser angle section L = 8 mm,the diffuser angle θ = 30°）.

关 键 词：空化喷嘴 湍流模型 数值模拟 流场 

分 类 号：V211.13[航空宇航科学与技术—航空宇航推进理论与工程]