【摘要】：本文以深水水庫(kù)庫(kù)底泥沙清淤為研究背景，并結(jié)合國(guó)內(nèi)外相關(guān)研究成果，對(duì)深水環(huán)境中自激吸氣式脈沖液氣射流裝置的沖蝕性能進(jìn)行了大量的理論分析和試驗(yàn)研究，得出了多個(gè)影響因素在深水條件下對(duì)自激吸氣式脈沖液氣射流裝置沖蝕性能的影響規(guī)律。本文研究成果將為自激吸氣式脈沖液氣射流技術(shù)在水庫(kù)、河道清淤等工程應(yīng)用中提供堅(jiān)實(shí)的技術(shù)基礎(chǔ)。 第一章概述了國(guó)內(nèi)外關(guān)于水射流技術(shù)的研究方向與成果。第二章基于流體力學(xué)、流體動(dòng)力學(xué)等理論，推理了自激吸氣式脈沖液氣射流噴嘴運(yùn)行機(jī)理及沖蝕機(jī)理。第三章對(duì)深水條件下自激吸氣式脈沖液氣射流噴嘴的沖蝕性能進(jìn)行了試驗(yàn)研究，分析了噴嘴結(jié)構(gòu)參數(shù)（上、下噴嘴直徑、腔長(zhǎng)、腔徑）及運(yùn)行參數(shù)（工作壓力、圍壓、靶距）對(duì)噴嘴沖蝕性能及吸氣量的影響規(guī)律，以及在深水條件下噴嘴產(chǎn)生較好沖蝕效果時(shí)對(duì)應(yīng)的結(jié)構(gòu)配比。 通過(guò)本文對(duì)自激吸氣式脈沖液氣射流在深水環(huán)境中沖蝕效果的研究，，結(jié)合三門(mén)峽水庫(kù)現(xiàn)場(chǎng)試驗(yàn)，可以初步得出利用自激吸氣式脈沖液氣射流噴嘴解決深水泥沙淤積是一種簡(jiǎn)單高效的方法，本文的研究成果能夠?yàn)檫M(jìn)一步分析自激吸氣式脈沖液氣射流作用機(jī)理及在深水環(huán)境下的應(yīng)用提供理論和技術(shù)支持。
[Abstract]:In this paper, with the background of deep water reservoir bottom silt cleaning, and combined with domestic and foreign related research results, a large number of theoretical analysis and experimental study on erosion performance of self-excited inspiratory pulse liquid jet device in deep water environment have been carried out. The influence of several factors on the erosion performance of the self-excited inspiratory pulse liquid-gas jet device under the condition of deep water is obtained. The research results in this paper will provide a solid technical basis for the application of self-excited inspiratory pulse-liquid jet technology in reservoir, river desilting and other projects. The first chapter summarizes the research direction and achievements of water jet technology at home and abroad. In the second chapter, based on the theories of hydrodynamics and hydrodynamics, the operation mechanism and erosion mechanism of the self-excited air-jet nozzle are deduced. In chapter 3, the erosion performance of self-excited inspiratory pulse liquid jet nozzle under deep water is studied, and the nozzle structure parameters (upper and lower nozzle diameter, cavity length, cavity diameter) and operation parameters (working pressure, confining pressure) are analyzed. The influence of target distance on the erosion performance and suction capacity of the nozzle and the corresponding structure ratio when the nozzle produces better erosion effect under the condition of deep water. Through the study of the erosion effect of self-excited inspiratory pulsed liquid gas jet in deep water environment, combined with the field test of Sanmenxia Reservoir, It can be preliminarily concluded that it is a simple and efficient method to solve sediment deposition in deep water by using self-excited inspiratory pulse liquid jet nozzle. The research results in this paper can provide theoretical and technical support for the further analysis of the mechanism of self-excited inspiratory pulsed liquid-gas jet and its application in deep-water environment.
【學(xué)位授予單位】：華北水利水電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TV136;TV697.31

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