本文選題：計(jì)算流體力學(xué) + 數(shù)值模擬�。� 參考：《太原理工大學(xué)》2012年碩士論文

【摘要】：泵是一種將原動機(jī)的機(jī)械能轉(zhuǎn)化為被輸送流體的壓力能和動能的動力設(shè)備,它是能源的輸運(yùn)動力,為了滿足工業(yè)發(fā)展的需要而發(fā)展起來的。提高泵的運(yùn)行安全性能和降低其能耗是泵研究設(shè)計(jì)者的兩個主要目標(biāo)。井用潛水泵是一項(xiàng)重要的農(nóng)田灌溉和人畜飲水設(shè)備,對抗御干旱,促進(jìn)農(nóng)業(yè)增產(chǎn),解決人畜飲水起到了舉足輕重的作用。 本文通過理論研究和數(shù)值模擬,對一款已有實(shí)驗(yàn)數(shù)據(jù)[49]的井用潛水泵,依據(jù)相關(guān)的設(shè)計(jì)理論和方法,進(jìn)行數(shù)學(xué)和物理建模,然后進(jìn)行數(shù)值模擬和研究分析。首先對離心泵設(shè)計(jì)理論作出較為詳細(xì)的介紹,以及對離心泵內(nèi)流場的數(shù)值模擬所需要的流場基本理論,也就是計(jì)算流體力學(xué)做出了簡要介紹。在對泵的流場研究的時候,基于三維模擬螺旋型蝸殼模擬的實(shí)現(xiàn)困難性,依據(jù)傳統(tǒng)設(shè)計(jì)理論基礎(chǔ),做了二維的數(shù)值模擬,蝸殼采用了標(biāo)準(zhǔn)螺旋型結(jié)構(gòu),對流場情況進(jìn)行了詳細(xì)分析。由于二維葉輪葉片的工作面無法實(shí)現(xiàn)空間曲面結(jié)構(gòu),為了實(shí)現(xiàn)葉輪部分的更合理化設(shè)計(jì),故而做出了三維數(shù)值模擬。利用UG進(jìn)行三維建模,建立出了三維流體流道模型,然后利用了Workbench進(jìn)行網(wǎng)格劃分,然后把劃分好的網(wǎng)格導(dǎo)入fluent中進(jìn)行計(jì)算,采用流量監(jiān)測揚(yáng)程的辦法進(jìn)行模擬,模擬方案分別選取了從小流量到大流量的18個工況點(diǎn)進(jìn)行,再對模擬結(jié)果的壓力場,湍動能場以及速度矢量場進(jìn)行了較為細(xì)致的分析,并對不同流量工況下的各種物理場進(jìn)行了比較分析,得出它們隨流量改變的變化規(guī)律。根據(jù)模擬所得結(jié)果,計(jì)算出各工況下的性能參數(shù),從而繪制出該離心式井用潛水泵的性能曲線,并對各性能曲線和實(shí)驗(yàn)數(shù)據(jù)所性能曲線進(jìn)行對比分析,然后得出了該設(shè)計(jì)的合理性和可行性。 本文通過理論分析和CFD數(shù)值模擬,最終得到了離心泵豐富的內(nèi)部流場信息,為該類離心泵的設(shè)計(jì)和進(jìn)一步的實(shí)驗(yàn)以及投入生產(chǎn)提供了一定的參考價值。
[Abstract]:Pump is a kind of power equipment which transforms the mechanical energy of the original motive into the pressure energy and kinetic energy of the conveyed fluid. It is the power of the energy and is developed to meet the needs of the industrial development. It is the two main goal of the pump research designer to improve the safety performance of the pump and reduce the energy consumption of the pump. The well submersible pump is an important one. The irrigation of farmland and the drinking water of man and livestock play an important role in fighting drought, promoting agricultural production and solving the problem of drinking water for human and livestock.
In this paper, through theoretical research and numerical simulation, the mathematical and physical modeling of a well submersible pump with an existing experimental data [49] is carried out according to the related design theory and method. Then the numerical simulation and analysis are carried out. First, the theory of centrifugal pump design is introduced in detail, and the numerical simulation of the flow field in the centrifugal pump is made. The basic theory of flow field, which is the computational fluid mechanics, is briefly introduced. In the study of the flow field of the pump, based on the traditional design theory basis, a two-dimensional numerical simulation is made based on the traditional design theory basis. The spiral case adopts the standard spiral structure, and the convective field is divided into detail. In order to realize the more rational design of the part of the impeller, three-dimensional numerical simulation is made in order to realize the more rational design of the impeller part. Three-dimensional modeling is made with UG, and a three-dimensional fluid flow channel model is established. Then Workbench is used to mesh the mesh, and then the meshed mesh is introduced into the fluent In the calculation, the method of flow monitoring head is used to simulate. The simulation scheme selects 18 working conditions from small flow to large flow, and then analyses the pressure field, turbulent kinetic field and velocity vector field of the simulated results, and compares and analyses the physical fields under different flow conditions. According to the simulation results, the performance parameters of each working condition are calculated, and the performance curves of the submersible pump for the centrifugal well are drawn, and the performance curves of each performance curve and the experimental data are compared and analyzed, and then the rationality and feasibility of the design are obtained.
In this paper, through theoretical analysis and CFD numerical simulation, the rich internal flow field information of the centrifugal pump is obtained, which provides a certain reference value for the design of this kind of centrifugal pump, the further experiment and the production of the centrifugal pump.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH311

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