| PIV 技术测量振荡射流流场 |
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| 引用本文： | 姬忠礼,席葆树,董守平.PIV 技术测量振荡射流流场[J].实验流体力学,1998(3). |
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| 作者姓名： | 姬忠礼 席葆树 董守平 |
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| 作者单位： | 清华大学工程力学系，北京石油大学机电工程系 |
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| 摘 要： | 利用以大功率双脉冲激光器为光源的ＰＩＶ技术，测定了由扁平射流和尖劈组成的二维振荡射流流场。实验结果表明，射流喷嘴与尖劈之间存在交错的、旋转方向相反的涡街，从而在尖劈两侧形成压力扰动。这种压力扰动波与不稳定射流的相互作用是整个系统产生流体振荡的原因。此外，还分析了射流喷嘴与尖劈之间的距离对流场的影响规律。
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| 关 键 词： | 粒子成像测速 振荡射流 瞬态流场 |
MEASUREMENT OF OSCILLATING JET USING PARTICLE IMAGE VELOCIMETRY |
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| Ji Zhongli Xi Baoshu Dept.of Engineering Mechanics,Tsinghua University,Beijing Dong Shouping Dept.of Mechanical Engineering,University of Petroleum,Beijing.MEASUREMENT OF OSCILLATING JET USING PARTICLE IMAGE VELOCIMETRY[J].Experiments and Measur in Fluid Mechanics,1998(3). |
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| Authors: | Ji Zhongli Xi Baoshu Deptof Engineering Mechanics Tsinghua University Beijing Dong Shouping Deptof Mechanical Engineering University of Petroleum Beijing |
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| Institution: | Ji Zhongli Xi Baoshu Dept.of Engineering Mechanics,Tsinghua University,Beijing 100084 Dong Shouping Dept.of Mechanical Engineering,University of Petroleum,Beijing 102200 |
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| Abstract: | The two dimensional oscillating flowfield of jet splitter system is measured by PIV technique which use double pulsed lasers.The experimental results show that there are alternative vortex pairs which rotates in opposite directions in flowfield between the nozzle and the splitter.The moving vortex pair produce the to and fro force at the two sides of the splitter.The interaction between the to and fro force at the two sides of the splitter and instable jet cause the self excitation of the jet splitter system.The influence of the nozzle splitter gap on the oscillating flowfield is also analyzed. |
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| Keywords: | particle image velocimetry oscillating jet instantaneous flowfield |
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