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自激脉冲喷嘴是一种利用流体内部特性产生脉冲效果的装置,因此其打击力、频率、振幅等效果参数受到运行参数和结构参数的影响,为得到影响自激脉冲效果的重要参数,探索自激现象产生的内在机理,利用Fluent软件对工作压力、上喷直径、腔径、腔长4个因素进行了3水平共计24组实验,并利用JMP软件对打击力、频率和振幅进行了定性分析,得出本次实验的最佳结构配比,通过腔体内部流场分析进一步完善了空化产生的机理,并对结构做出一定优化,提高了自激效果.
Self-excited pulsed jet nozzle is a kind of device that uses the internal characteristics of fluid to generate pulse effect. Therefore, the impact parameters such as impact force, frequency and amplitude are influenced by operating parameters and structural parameters. To obtain the important parameters that affect the effect of self- Intrinsic mechanism of stimulus phenomena was established. Fluent software was used to conduct a total of 24 experiments at three levels including working pressure, diameter, cavity diameter and cavity length. The impact force, frequency and amplitude were qualitatively analyzed by JMP software , The optimal structure ratio of this experiment is obtained. The mechanism of cavitation generation is further improved through the flow field analysis inside the cavity, and the structure is optimized to improve the self-excitation effect.