射流振荡器的回流特性和切换特性研究

发布时间：2018-06-04 02:26

  本文选题：射流振荡器 + 数值模拟　； 参考：《科学技术与工程》2016年32期

【摘要】：射流振荡器是一种能在入口提供定常流动,出口产生非定常脉动射流的流体器件。本文以数值模拟为主要手段,研究一种射流振荡器内部流场特征,并研究其回流特性和切换机理。提出主射流沿着其中一个出口流出,由于受到腔体低压区的作用,另一个出口产生回流。回流程度随进出口压力和环境温度的升高而减小,随劈距的增加而增大。随控制端流量的增加,出口相对入口流量不断减小,继续增加控制端流量,射流发生切换。对射流振荡器的研究设计具有一定的参照意义。
[Abstract]:Jet oscillator is a kind of fluid device which can provide steady flow at the entrance and produce unsteady pulsating jet at the outlet. In this paper, numerical simulation is used to study the internal flow field characteristics of a jet oscillator, and its reflux characteristics and switching mechanism are also studied. It is proposed that the main jet flows out along one of the exits, and the other outlet produces reflux due to the effect of the low pressure region of the cavity. The degree of reflux decreases with the increase of inlet and outlet pressure and ambient temperature, and increases with the increase of split distance. With the increase of the flow rate at the control end, the relative inlet flow rate of the outlet decreases, and the flow rate of the control end continues to increase, and the jet switches. It has certain reference significance to the research and design of jet oscillator.
【作者单位】： 北京航空航天大学能源与动力工程学院;
【分类号】：O358
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本文编号：1975421