增压式脉冲水射流脉动特性可视化试验研究

汤积仁,汪壘,卢义玉,凌远非,张洋凯,姚奇,朱志丹

振动与冲击 ›› 2021, Vol. 40 ›› Issue (20) : 1-8.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (20) : 1-8.
论文

增压式脉冲水射流脉动特性可视化试验研究

  • 汤积仁1,2,汪壘1,2,卢义玉1,2,凌远非1,2,张洋凯1,2,姚奇1,2,朱志丹1,2
作者信息 +

An experimental study on visualization of pulsation characteristics of supercharged pulsed water jet

  • TANG Jiren1,2,WANG Lei1,2,LU Yiyu1,2,LING Yuanfei1,2,ZHANG Yangkai1,2,YAO Qi1,2,ZHU Zhidan1,2
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摘要

脉冲水射流技术在硬岩破碎领域上具有较好的应用前景。为进一步提高脉冲水射流的破岩效率,提出了一种增压式脉冲水射流发生方法,以较小的输入压力下获取较高的脉冲压力。基于高速摄像技术及压力动态测试手段,搭建了增压式脉冲水射流外流场可视化测试系统,分别从射流压力、脉冲频率、形态及结构演变四个方面研究了增压式脉冲水射流的脉动特性。结果表明:增压式脉冲水射流是由低压连续射流段和高压脉冲射流段相互衔接而成的组合射流,射流压力大小随时间呈脉动性变化且脉动幅度可调,其脉冲射流段峰值压力随进油压力升高而增大,与增压腔初始压力无关;脉冲频率与进油压力呈幂函数增长关系,随增压腔初始压力增大最终趋于平稳;射流形态周期内演变过程具有明显的四个阶段:连续射流阶段、脉冲射流产生与发展阶段、脉冲射流稳定阶段、脉冲射流消散阶段,射流结构呈现多级脉动特征。研究结果为进一步研究和应用增压式脉冲水射流奠定基础。

Abstract

The technology of pulsed water jet has a good application prospect in the field of hard rock crushing.To improve the rock breaking efficiency of pulsed water jet, a method of supercharged pulse water jet generation was proposed to obtain a higher pulse pressure at a lower input pressure.Based on high-speed camera technology and pressure dynamic test methods, a visualization test system of the external flow field of the pressurized pulsed water jet was set up, the pulsation characteristics of the supercharged pulse water jet were studied from four aspects: jet pressure, pulse frequency, morphology and structure evolution.The results show that the supercharged pulse water jet is a combined jet composed of low pressure continuous jet section and high pressure pulse jet section, the size of jet pressure shows that pulsating change with time and the amplitude of the pressure pulsation is adjustable, in which the peak pressure of pulse jet increases with the increase of the oil inlet pressure, irrelevant with the initial pressure of the booster chamber; while the pulse frequency increases as a power function with the increase of the inlet pressure, it eventually tends to be stable as the initial pressure of the pressurizing chamber increases; there are four distinct stages in the evolution process of jet form cycle: continuous jet stage, pulse jet generating and developing stage, pulse jet stabilization stage, pulse jet dismissing stage, and its structure exhibits multi-stage pulsation characteristics.The research results lay a foundation for further research and application of supercharged pulse water jet.

关键词

增压式脉冲水射流 / 可视化 / 脉动特性 / 脉冲频率

Key words

supercharged pulsed water jet / visualization / pulsation characteristics / pulse frequency

引用本文

导出引用
汤积仁,汪壘,卢义玉,凌远非,张洋凯,姚奇,朱志丹. 增压式脉冲水射流脉动特性可视化试验研究[J]. 振动与冲击, 2021, 40(20): 1-8
TANG Jiren,WANG Lei,LU Yiyu,LING Yuanfei,ZHANG Yangkai,YAO Qi,ZHU Zhidan. An experimental study on visualization of pulsation characteristics of supercharged pulsed water jet[J]. Journal of Vibration and Shock, 2021, 40(20): 1-8

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