摘要
本文对射流激励式亥姆霍兹式流体振荡器进行了理论分析,运用流体瞬变流理论和流体自持振动理论,分析并推导出设计这种流体振荡器的数学模型。通过射流流场轴心动态压力信号的测试和功率谱分析,用射流冲蚀一级标准岩样,研究了这种振荡器对射流的调制作用,以及振荡器出入口形状、腔室结构尺寸对其冲蚀性能的影响。由实验确定了这种流体振荡器的最佳入口形状以及腔室结构尺寸范围,证实了这种振荡器可以产生很大的压力振荡,得到了射流轴心压力随无因次喷距的变化规律。
Theoretical analysis of jet-driven llelmholtz resonator isgiven in this paper. The mathematical model of fluid oscillator, based on the theory of fluid transients and self-sust ained fluid oscillator, were derived. On the basis of the measurement of dynamic pressure signal along the centre line of jet and its power spectrum analysis, the tuning function of such oscillator, the effect of the inlet contour and outlet contour and the configuration size on jet erosion property were studied by a group of jet cutting standard rock samples. The optimum inlet contour and the scope of configuration size have been obtained on expriment. It was also proved that such oscillator is able to produce high pressure oscillation and the principle pressure on the centre line changes with the dimensionless stand-off distance has been obtained
出处
《石油大学学报（自然科学版）》
CSCD
1989年第2期22-30,共9页
Journal of the University of Petroleum,China(Edition of Natural Science)
