第四章讨论空化发生前，喷嘴结构参数及运行参数对激振效果的影响，提出自激喷嘴的数值优化理论。
In chapter 4, the effects of the nozzle construction and the operating parameters to the self excitation before the cavitations actions have been discussed.
第五章讨论喷嘴结构参数及运行参数对激振效果的影响，提出自激喷嘴的数值优化理论。
In the chapter 6: the verification has been made from the experiment, and the last optimal range of structural parameters and operate parameters are confirmed.
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