【摘要】：立式旋轉(zhuǎn)噴射泵(簡(jiǎn)稱旋噴泵),是基于畢托管原理研制的新型低比轉(zhuǎn)速泵,具有流量小、揚(yáng)程高、Q-H曲線平坦、效率高、結(jié)構(gòu)簡(jiǎn)單等特點(diǎn),廣泛應(yīng)用于食品、石油化工、冶金、造紙、消防等行業(yè)。由于國內(nèi)對(duì)旋噴泵的研究起步較晚,研究不夠全面深入,致使該類型泵的使用效率仍較低,應(yīng)用較少。因此研究旋噴泵的內(nèi)部流動(dòng)規(guī)律和優(yōu)化設(shè)計(jì)方法對(duì)該類型泵的推廣和應(yīng)用有著重大的理論價(jià)值和良好的前景。 本論文主要應(yīng)用數(shù)值模擬分析的方法,通過一定的理論基礎(chǔ)研究,探求旋噴泵的流動(dòng)特性,特別是集流管、葉輪、轉(zhuǎn)子腔等主要結(jié)構(gòu)的流動(dòng)特性、設(shè)計(jì)參數(shù)及外特性關(guān)系,對(duì)已有的產(chǎn)品尋求優(yōu)化方案,并開發(fā)出具有獨(dú)立知識(shí)產(chǎn)權(quán)的高效旋噴泵,以滿足市場(chǎng)和客戶的新需求,同時(shí)也為旋噴泵基于CFD的設(shè)計(jì)和優(yōu)化提供理論基礎(chǔ)和實(shí)驗(yàn)論證。 本文的主要工作是基于CFD理論及其應(yīng)用軟件,根據(jù)實(shí)際工況,設(shè)計(jì)多種模型,采用數(shù)值模擬的方法,對(duì)集流管及轉(zhuǎn)子腔的內(nèi)部流動(dòng)進(jìn)行流場(chǎng)分析和優(yōu)化研究,由此得出最優(yōu)水力結(jié)構(gòu)參數(shù)。利用Pro/ENGINEER進(jìn)行三維建模,導(dǎo)入ICEM-CFD進(jìn)行網(wǎng)格劃分,并利用CFD軟件Ansys-CFX對(duì)集流管、轉(zhuǎn)子腔的內(nèi)部流場(chǎng)進(jìn)行數(shù)值模擬,得到內(nèi)部流場(chǎng)的速度場(chǎng)、壓力場(chǎng),并計(jì)算、對(duì)比分析旋噴泵的性能曲線——揚(yáng)程、軸功、效率曲線。通過改變旋噴泵的結(jié)構(gòu)參數(shù),對(duì)設(shè)計(jì)的多種水力模型進(jìn)行仿真計(jì)算,得出葉輪結(jié)構(gòu)形式、葉片形狀、葉片數(shù),集流管的擴(kuò)散段截面形狀、轉(zhuǎn)彎半徑等結(jié)構(gòu)參數(shù)對(duì)旋噴泵性能的影響,從而對(duì)葉輪、集流管和轉(zhuǎn)子腔進(jìn)行性能分析和優(yōu)化,對(duì)比得出優(yōu)化的理想結(jié)構(gòu)。仿真模擬計(jì)算的準(zhǔn)確性通過實(shí)驗(yàn)驗(yàn)證。 有關(guān)旋噴泵的數(shù)值模擬技術(shù)、數(shù)值優(yōu)化設(shè)計(jì)方法以及工程優(yōu)化設(shè)計(jì)技術(shù)等正是本文工作的研究背景。對(duì)這些問題的深入研究,為旋噴泵的設(shè)計(jì)和優(yōu)化提供理論基礎(chǔ)和實(shí)驗(yàn)論證,具有非常重要的理論和實(shí)踐意義。
[Abstract]:The vertical rotary jet pump (called rotary jet pump) is a new type of low specific speed pump based on the principle of Pitot. It has the characteristics of small flow rate, flat Q-H curve with high lift, high efficiency, simple structure and so on. It is widely used in food, petrochemical, metallurgy, etc. Paper, fire and other industries. Due to the late start of the domestic research on the rotary jet pump, the research is not thorough enough, so the efficiency of the pump is still low and the application is less. Therefore, it is of great theoretical value and good prospect to study the internal flow law and optimal design method of rotary jet pump for its popularization and application. This paper mainly uses the numerical simulation analysis method, through certain theoretical foundation research, explores the flow characteristic of the rotary jet pump, especially the flow characteristic of the main structure, such as the collecting tube, impeller, rotor cavity and so on, the design parameter and the external characteristic relation. In order to meet the new demand of market and customer, the optimization scheme of existing products is sought, and the efficient rotary jet pump with independent intellectual property is developed to meet the new demand of market and customers. At the same time, it also provides the theoretical basis and experimental demonstration for the design and optimization of rotary jet pump based on CFD. The main work of this paper is based on the CFD theory and its application software, according to the actual working conditions, design a variety of models, using numerical simulation method to analyze and optimize the flow field of the flow inside the collector tube and rotor cavity. The optimal hydraulic structure parameters are obtained. Pro/ENGINEER is used to build 3D model, ICEM-CFD is imported to mesh, and CFD software Ansys-CFX is used to simulate the internal flow field of collecting tube and rotor cavity. The velocity field and pressure field of internal flow field are obtained and calculated. The performance curve-head, shaft work and efficiency curve of rotary jet pump are compared and analyzed. By changing the structural parameters of the rotary jet pump and simulating various hydraulic models, the structure form of impeller, the shape of blade, the number of blades and the section shape of diffusive section of collecting tube are obtained. By analyzing and optimizing the performance of impeller, collecting tube and rotor cavity, the optimal structure is obtained by comparing the influence of turning radius and other structural parameters on the performance of rotary jet pump. The accuracy of simulation and calculation is verified by experiments. The research background of this paper is the numerical simulation technology, numerical optimization design method and engineering optimization design technology of rotary jet pump. The research on these problems provides theoretical basis and experimental demonstration for the design and optimization of rotary jet pump, which is of great theoretical and practical significance.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH38

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