摘要
本文概述了自激空化射流的原理和自激喷嘴的设计方法;并在常压下进行了淹没自激空化水射流冲蚀人造岩芯的试验研究。重点研究了风琴管喷嘴的腔室底部形状、出口喉部厚度和出口扩散角对射流冲蚀性能的影响,得出了有规律性的结果。同时在不同泵压、不同喷距的条件下对所设计的喷嘴射流轴心压力脉动作了测量。结果表明,风琴管喷嘴的射流压力脉动大于锥形喷嘴的射流压力脉动,且压力脉动的规律和破岩规律有密切的关系。
This paper summarizes the results of research on self-resonating cavitating jet, theprinciple and method designing method for self-resonating nozzles. An experimental studyon the erosion of artifical sandstones imposed by submerged self-resonating water jets ismade under atmospheric pressure. The emphasis is put on the inlet and exit geometric contour of the Organ-pipe nozzle, including its chamer bottom contour, exit throat lengthand exit divergent angle. The influence of these factors on the erosion action is studied andsome regular results are obtained. The pressure on the axis of the jet is measured at different pump pressures and different stand-off distances. Experimental results show that jetpressure pulsations of Organ-pipe nozzles are higher than that of cone-shaped nozzles,and that the rock erosion has close relations with the pressure pulsation of the jet. A basisfor further improvement of Organ-pipe nozzles and analysis of the mechanism ofself-resonating cavitating jets is provided.
出处
《江汉石油学院学报》
CSCD
北大核心
1989年第2期79-88,共10页
Journal of Jianghan Petroleum Institute
关键词
钻头喷嘴
自激空化射流
岩石破碎
self-resonating cavitating jet
Organ-pipe nozzle
erosion
pressure pulsation
