【摘要】：在閱讀國內(nèi)外大量文獻的基礎(chǔ)上，研究了淹沒時不同工況下自激吸氣脈沖射流裝置的打擊特性和吸氣的性能，確定了射流均值打擊力的分布范圍以及規(guī)律，分析了無量綱參數(shù)對射流相對打擊力的影響以及對射流相對吸氣量的影響，得出了最優(yōu)性能參數(shù)以及最優(yōu)吸氣參數(shù)。本文的研究結(jié)果為深入研究深水自激吸氣脈沖射流提供了依據(jù)。 第一章分析了詳細概況了國內(nèi)外自激脈沖射流的進展情況。第二章依據(jù)水射流理論，分別分析了分淹沒射流的產(chǎn)生結(jié)構(gòu)以及有何種特性，和淹沒射流的產(chǎn)生結(jié)構(gòu)以及有何種特性，詳細分析了射流是如何對物體作用的；闡述了自激脈沖射流的產(chǎn)生機理和工作原理；根據(jù)淹沒射流的產(chǎn)生機理，對射流裝置的波速和頻率進行分析，初步分析了淹沒條件下自激吸氣式脈沖射流的產(chǎn)生機理。第三章分析了不同工況條件下自激吸氣式脈沖射流裝置的性能。運用無量綱分析了非淹沒條件下和淹沒條件下最佳相對打擊力的參數(shù)配比，，并且分析了淹沒條件下吸氣比不吸氣相對打擊力提升的百分比，并且運用無量綱法分析了淹沒條件下參數(shù)配比（上下噴嘴面積比、腔徑與上噴嘴直徑比、腔長與上噴嘴直徑比以及圍壓與工作壓力比）與相對吸氣量之間的影響關(guān)系。分析了不同參數(shù)對打擊范圍的影響。
[Abstract]:On the basis of reading a large number of literatures at home and abroad, this paper studies the striking characteristics and inspiratory performance of the self-excited inspiratory pulse jet device under different operating conditions, and determines the distribution range and law of the mean impact force of the jet. The effects of dimensionless parameters on the relative impact force of the jet and on the relative suction capacity of the jet are analyzed. The optimal performance parameters and the optimal inspiratory parameters are obtained. The results of this paper provide a basis for further study of deep water self-excited inspiratory pulse jet. In the first chapter, the progress of self-excited pulse jet at home and abroad is analyzed in detail. In the second chapter, according to the theory of water jet, the structure and characteristics of the submergence jet are analyzed, and the structure and characteristics of the submerged jet are analyzed in detail, and how the jet acts on the object is analyzed in detail. The generation mechanism and working principle of self-excited pulsed jet are expounded, according to the generation mechanism of submerged jet, the wave velocity and frequency of jet device are analyzed, and the mechanism of self-excited inspiratory pulse jet under submerged condition is analyzed preliminarily. In chapter 3, the performance of self-excited inspiratory pulse jet under different operating conditions is analyzed. Using dimensionless analysis, the optimum ratio of relative impact force under non-submerged condition and submerged condition is analyzed, and the percentage of inspiratory ratio to non-suction relative to impact force under submerged condition is analyzed. The relationship between the ratio of parameters (area ratio of upper and lower nozzles, the ratio of cavity diameter to upper nozzle diameter, the ratio of cavity length to upper nozzle diameter and the ratio of confining pressure to working pressure) and the relative inspiratory capacity is analyzed by using dimensionless method. The influence of different parameters on the range of strike is analyzed.
【學(xué)位授予單位】：華北水利水電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV136;TV697.31

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