摘要
用间歇涡环代替圆形射流剪切层，对圆形射流流场的流动结构进行了数值模拟。研究中考虑了喷嘴喉部结构形状（喷嘴内流过渡曲面为球面或椭球面或其它旋转曲面，出口形状为锥面或锥面加环套）对旋涡脱落的影响及其与射流流场的相互作用。计算结果表明，内流过渡曲面为椭球面而出口形状为锥面的风琴管式喷嘴，喷射出的圆形射流流杨具有良好的大尺度涡环结构。
Numerical simulation of the axisymmctric jet flowfield structure is made byreplacing the shear layer W,ith discrete vortex rings,considering the effect of the nozzleconfiguration on the vortex shedding process. The computation resuIts show that flowfield ofjet emanated from the nozzle with the type of elliptic contour and conic exit contour is of awell-organized large scale vortex structure.
出处
《石油大学学报（自然科学版）》
CSCD
1995年第6期34-36,共3页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
国家教委博士点基金
关键词
射流
流场
紊流
数值模拟
高压射液钻井
钻井
Jet:Flow field:Flow property,Turbulent flow: Nozzle: Numericalsimulation
