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本文简要地介绍了管系共振的概念及管内瞬态流功基本方程。同时还介绍了在试验室内建立的共振系统,以及对共振射流的结构及其打击效果所进行的一系列试验和测定。 用电测法和高速摄影法对共振射流的结构所进行的研究表明,共振射流具有强烈的压力和流量脉动特性。共振射流是由一串液柱所组成的,在喷嘴处共振射流的峰值压力比平均值能提高一倍左右。通过冲击测力靶和切割煤样的试验,证明共振射流的打击力和效果比普通射流也有所提高。
This paper briefly introduces the concept of tube resonance and the basic equation of transient flow in tube. At the same time, the resonance system established in the laboratory and the series of tests and measurements on the structure of the resonance jet and its striking effect are also introduced. The research on the structure of resonance jet by electrical method and high-speed photography shows that the resonance jet has strong pressure and flow pulsation characteristics. Resonance jet is composed of a series of liquid column, the jet at the jet resonance peak pressure than the average can be increased by about double. Through the impact of the target and the cutting of coal-like test proves that the resonance jet impact and effectiveness than ordinary jet also increased.