自激脉冲喷嘴装置试验研究

Experimental Study of Self-Excited Pulse Jet

本文对自激脉冲射流喷嘴进行试验设计和数据分析,以自激频率、振幅以及打击力等作为响应函数,研究喷嘴结构与工作压力的配套关系。通过对自激频率和振幅的分析,揭示自激振荡腔内部周期性空化现象及其对自激脉冲形成的影响,从而从解释自激脉冲射流发生机理。根据试验数据,拟合打击力随参数变化的经验公式。最终得出工业应用中典型尺寸范围的自激脉冲喷嘴与自激频率及打击力的关系,为工业设计中的频域调制理论提供了试验数据。

Design of experiment and data analysis of self-excited pulse jet have been done in the paper.The relationship between nozzle structure and operating pressure has been studied based on the response function of self-excited frequencies,amplitude and hitting force.The periodic cavitation in the chamber and its effect on the self-excited pulse has been revealed according to the analysis of self-excited frequency and amplitude.Then the generative mechanism of self-excited pulse was revealed.The empirical formula of the hitting force on the various parameters has been concluded based on the results of the experiment.The relationship between the typical size range of the pulse nozzle,the self-excited frequency and hitting force for various industrial applications have been promoted in the end.The experimental data have been provided to frequency modulation for industrial design.