本文選題：雙吸離心泵 + CFD��； 參考：《浙江工業(yè)大學(xué)》2011年碩士論文

【摘要】：能源的日益緊張對(duì)離心泵的研究和制造提出了新的要求,離心泵不僅需要適應(yīng)越來廣泛的應(yīng)用領(lǐng)域,還需要適應(yīng)越來越嚴(yán)格的節(jié)能要求,這就要求離心泵在研究、設(shè)計(jì)和制造等環(huán)節(jié)中有新的突破。進(jìn)入21世紀(jì)一來,計(jì)算流體動(dòng)力學(xué)(Computational Fluid Dynamic, CFD)技術(shù)在模擬離心泵內(nèi)部流動(dòng)中得到了廣泛和有效的應(yīng)用。將CFD技術(shù)和優(yōu)化設(shè)計(jì)方法結(jié)合起來,能夠大大提高產(chǎn)品的研發(fā)周期以及提高產(chǎn)品的性能,這已成為一個(gè)熱門的發(fā)展方向。 本文的主要工作和成果如下： 1.對(duì)CFD數(shù)值模擬技術(shù)及其在離心泵設(shè)計(jì)中的應(yīng)用概況、以及離心泵的優(yōu)化設(shè)計(jì)方法的研究現(xiàn)狀進(jìn)行了總結(jié)。 2.使用Pro/e軟件對(duì)150S-50雙吸離心泵三維水力模型建立模型,運(yùn)用Gambit對(duì)模型進(jìn)行網(wǎng)格劃分。在分析比較數(shù)值模擬中常用的湍流模型和計(jì)算方法后,選擇最適合本文模型的數(shù)值模擬設(shè)置,利用Fluent對(duì)模型進(jìn)行了整機(jī)非定常數(shù)值模擬。 3.通過Fluent的模擬結(jié)果,對(duì)150S-50雙吸離心泵進(jìn)行性能預(yù)測(cè)并對(duì)葉輪流場(chǎng)、蝸殼流場(chǎng)和氣蝕情況進(jìn)行了分析,驗(yàn)證所選數(shù)值模擬方法的可行性。 4.在總結(jié)文獻(xiàn)的基礎(chǔ)上,提出了泵的優(yōu)化方案。在優(yōu)化過程中,分析已有的機(jī)械損失、容積損失和水力損失的經(jīng)驗(yàn)公式,選擇對(duì)本文模型預(yù)測(cè)最準(zhǔn)確的一組公式。接著以離心泵總效率為優(yōu)化目標(biāo)函數(shù),以五個(gè)葉輪的設(shè)計(jì)參數(shù)為自變量,推導(dǎo)出總效率和葉輪各個(gè)設(shè)計(jì)參數(shù)之間的函數(shù)關(guān)系。 5.利用Matlab,分析效率與比轉(zhuǎn)數(shù)、揚(yáng)程之間的函數(shù)關(guān)系。使用遺傳優(yōu)化方法,求出總效率的最大值和新的葉輪設(shè)計(jì)參數(shù),從理論上計(jì)算出總效率提升了1.65%。重新建立三維水力模型,并再次使用非定常數(shù)值模擬方法對(duì)優(yōu)化方法進(jìn)行了驗(yàn)證。結(jié)果表明：優(yōu)化后的泵在標(biāo)準(zhǔn)工況下總效率提升1.67%,實(shí)現(xiàn)了優(yōu)化目的標(biāo),達(dá)到了節(jié)能目的。
[Abstract]:The increasing strain of energy has put forward new requirements for the research and manufacture of centrifugal pumps. Centrifugal pumps need not only to adapt to more and more extensive application fields, but also to adapt to more and more stringent requirements for energy saving, which requires the research of centrifugal pumps.There are new breakthroughs in design and manufacturing.In the 21st century, Computational Fluid dynamic (CFDs) technology has been widely and effectively applied to simulate the internal flow of centrifugal pumps.The combination of CFD technology and optimization design method can greatly improve the product research and development cycle and improve the performance of the product, which has become a hot development direction.The main work and results of this paper are as follows:1.This paper summarizes the CFD numerical simulation technology and its application in centrifugal pump design, as well as the research status of the optimization design method of centrifugal pump.2.The 3D hydraulic model of 150S-50 double suction centrifugal pump is built by Pro/e software, and the model is meshed by Gambit.After analyzing and comparing the turbulence models and calculation methods commonly used in numerical simulation, the most suitable numerical simulation settings for this model are selected, and the unsteady numerical simulation of the model is carried out by using Fluent.3.Based on the simulation results of Fluent, the performance of 150S-50 double suction centrifugal pump is predicted, and the blade rotation field, volute flow field and cavitation erosion are analyzed to verify the feasibility of the numerical simulation method.4.On the basis of summarizing literature, the optimization scheme of pump is put forward.In the process of optimization, the empirical formulas of mechanical loss, volume loss and hydraulic loss are analyzed, and the most accurate set of formulas for the prediction of this model are selected.Then, taking the total efficiency of centrifugal pump as the optimization objective function and the design parameters of five impellers as independent variables, the functional relationship between the total efficiency and the design parameters of impeller is deduced.5.The function relationship among efficiency, specific rotation number and head is analyzed by Matlab.The maximum of total efficiency and new design parameters of impeller are obtained by using genetic optimization method, and the total efficiency is increased by 1.65% theoretically.The 3D hydraulic model was reestablished and the unsteady numerical simulation method was used to verify the optimization method.The results show that the total efficiency of the optimized pump is improved by 1.67 in the standard working condition, the optimization goal is realized and the energy saving is achieved.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH311

【參考文獻(xiàn)】

中國期刊全文數(shù)據(jù)庫 前10條

1 駱大章;劉樹洪;;低比轉(zhuǎn)數(shù)離心泵圓盤摩擦損失試驗(yàn)研究[J];排灌機(jī)械;1989年03期

2 汪建華;離心泵葉輪參數(shù)的優(yōu)化設(shè)計(jì)[J];排灌機(jī)械;1994年02期

3 何希杰;朱廣奇;勞學(xué)蘇;;遺傳算法在離心泵優(yōu)化設(shè)計(jì)中的應(yīng)用[J];排灌機(jī)械;2008年02期

4 張人會(huì);楊軍虎;李仁年;;離心泵葉輪的參數(shù)化設(shè)計(jì)[J];排灌機(jī)械;2009年05期

5 胡樂;張淑佳;毛鵬展;徐鋮;;定常多相位與非定常計(jì)算方法在雙吸離心泵數(shù)值模擬中的應(yīng)用[J];輕工機(jī)械;2011年02期

6 肖若富;王正偉;;基于組合優(yōu)化策略的離心泵葉輪優(yōu)化設(shè)計(jì)[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年05期

7 張良;王偉;王仁人;;面向渦輪增壓器蝸殼內(nèi)流動(dòng)計(jì)算的網(wǎng)格劃分[J];農(nóng)業(yè)裝備與車輛工程;2011年05期

8 鮑云樵;;發(fā)展低碳經(jīng)濟(jì)應(yīng)對(duì)全球氣候變暖[J];中外能源;2010年03期

9 何希杰 ,楊啟奎;離心泵各種效率不同公式精度的比較[J];通用機(jī)械;2005年10期

10 何希杰;陳巖;勞學(xué)蘇;;我國石油工業(yè)用泵技術(shù)發(fā)展概述[J];通用機(jī)械;2011年03期

中國碩士學(xué)位論文全文數(shù)據(jù)庫 前1條

1 董亮;非結(jié)構(gòu)化網(wǎng)格生成技術(shù)研究及應(yīng)用[D];江蘇大學(xué);2010年

，

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