自激吸气式脉冲液气射流冲蚀效果研究
发布时间：2018-08-15 19:14
【摘要】：本文以深水水库库底泥沙清淤为研究背景，并结合国内外相关研究成果，对深水环境中自激吸气式脉冲液气射流装置的冲蚀性能进行了大量的理论分析和试验研究，得出了多个影响因素在深水条件下对自激吸气式脉冲液气射流装置冲蚀性能的影响规律。本文研究成果将为自激吸气式脉冲液气射流技术在水库、河道清淤等工程应用中提供坚实的技术基础。 第一章概述了国内外关于水射流技术的研究方向与成果。第二章基于流体力学、流体动力学等理论，推理了自激吸气式脉冲液气射流喷嘴运行机理及冲蚀机理。第三章对深水条件下自激吸气式脉冲液气射流喷嘴的冲蚀性能进行了试验研究，分析了喷嘴结构参数（上、下喷嘴直径、腔长、腔径）及运行参数（工作压力、围压、靶距）对喷嘴冲蚀性能及吸气量的影响规律，以及在深水条件下喷嘴产生较好冲蚀效果时对应的结构配比。 通过本文对自激吸气式脉冲液气射流在深水环境中冲蚀效果的研究，，结合三门峡水库现场试验，可以初步得出利用自激吸气式脉冲液气射流喷嘴解决深水泥沙淤积是一种简单高效的方法，本文的研究成果能够为进一步分析自激吸气式脉冲液气射流作用机理及在深水环境下的应用提供理论和技术支持。
[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.
【学位授予单位】：华北水利水电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV136;TV697.31
本文编号：2185152
[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.
【学位授予单位】：华北水利水电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV136;TV697.31
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