介绍一种新型射流——自振空化射流的设计原理、冲击压力特性、冲蚀破岩特性和现场应用情况。研究表明，以风琴管结构为基础设计的喷嘴可以产生强烈的自振空化射流，与锥角为 120°的普通锥形喷嘴相比，冲击压力脉动幅度和峰值分别提高24%和37%，冲蚀岩石效果提高1～2倍。自振空化射流已成功应用到石油工程中，研制出自振空化射流钻头、高压旋转自振空化射流处理近地层技术和自激波动注水技术，取得明显的经济效益。

The paper presents advances in investigations of a new jet , the self-resonating water jet, including its design principles, impacting properties of impact pressure and rock erosion, and field applications in China. The researches show that nozzles designed on basis of organ pipe structure can generate self-resonating cavitating water jets. As compared with conventional cone-shaped nozzle with 120 degree of taper angle, the amplitude of impulse pressure, and maximum impact pressure increases 24% and 37% respectively, and rock breaking efficiency increases by 1 to 2 times. Self-resonating water jets have been successfully applied in petroleum engineering. Roller bits, devices for treatment of near well- bore formation, self-excited oscillating water injectors with the self-resonating water jet technique have been developed, and great economic efficiency has been achieved.