本文選題：雙吸式葉輪 + 參數(shù)化��； 參考：《湘潭大學(xué)》2013年碩士論文

【摘要】：葉輪是離心泵的關(guān)鍵部件，其設(shè)計(jì)速度和水力學(xué)性能直接影響到產(chǎn)品的開(kāi)發(fā)周期和競(jìng)爭(zhēng)力。為節(jié)省離心泵葉輪水力學(xué)性能的驗(yàn)證以及優(yōu)化的成本，，本文采用參數(shù)化建模手段大幅度降低模型建立的時(shí)間，利用FLUENT軟件對(duì)離心泵葉輪內(nèi)部流場(chǎng)進(jìn)行仿真分析以節(jié)省試驗(yàn)成本。 本論文以雙吸型離心泵葉輪為基礎(chǔ)，在詳細(xì)了解國(guó)內(nèi)外葉輪CAD技術(shù)的前提下，針對(duì)目前雙吸型葉輪的不足之處，采用參數(shù)化建模技術(shù)，在SolidWorks這一軟件平臺(tái)上，開(kāi)發(fā)出雙吸型離心泵參數(shù)化設(shè)計(jì)軟件，為后續(xù)葉輪內(nèi)部流場(chǎng)分析作好了準(zhǔn)備。 近年來(lái)，計(jì)算流體力學(xué)（CFD）技術(shù)已經(jīng)成功地運(yùn)用于數(shù)值模擬分析離心泵內(nèi)部流場(chǎng)，本文在前面參數(shù)化建模的基礎(chǔ)上，以FLUENT軟件計(jì)算分析了雙吸式離心泵內(nèi)部流場(chǎng)，同時(shí)對(duì)葉輪優(yōu)化方案進(jìn)行了探討。 本文的研究結(jié)果有： (1)以流場(chǎng)分析為目的，分析研究了葉輪流場(chǎng)區(qū)域的建模方案； (2)采用參數(shù)化技術(shù)建模，大幅度減少了葉輪設(shè)計(jì)人員的重復(fù)工作，提高了設(shè)計(jì)生產(chǎn)效率； (3)在參數(shù)化建模的基礎(chǔ)上，采用商業(yè)軟件FLUENT對(duì)雙吸式離心泵內(nèi)部流場(chǎng)進(jìn)行了分析，為后續(xù)雙吸式離心泵葉輪參數(shù)優(yōu)化提供了計(jì)算依據(jù)。計(jì)算結(jié)果表明，本文采用FLUENT軟件對(duì)離心泵葉輪內(nèi)部流場(chǎng)進(jìn)行分析是可行的； (4)在參數(shù)化建模的基礎(chǔ)上，對(duì)葉輪優(yōu)化方案進(jìn)行了探討。對(duì)于本文的研究的低比轉(zhuǎn)速離心泵，在葉輪內(nèi)添加偏置短葉片可以大幅度提高離心泵的揚(yáng)程，同時(shí)大量的數(shù)值計(jì)算表明，短葉片的添加會(huì)在一定程度上減小尾流區(qū)域，但并不一定會(huì)使離心泵的水力學(xué)性能提高。本文研究對(duì)象的偏置短葉片最佳入口直徑為370mm，此時(shí)揚(yáng)程提升9.96%，水力學(xué)效率提高0.74%。
[Abstract]:Impeller is the key component of centrifugal pump. Its design speed and hydraulic performance directly affect the development cycle and competitiveness of the product. In order to reduce the hydraulic performance verification and optimization cost of centrifugal pump impeller, the parameterized modeling method is used to greatly reduce the time of modeling, and the flow field in centrifugal pump impeller is simulated by FLUENT software to save test cost. This paper is based on double suction centrifugal pump impeller, on the premise of knowing the impeller CAD technology at home and abroad in detail, aiming at the deficiency of double suction impeller at present, adopting parameterized modeling technology, on the SolidWorks software platform. The parameterized design software of double suction centrifugal pump is developed to prepare for the flow field analysis of impeller. In recent years, the computational fluid dynamics (CFD) technique has been successfully applied to the numerical simulation and analysis of the flow field in the centrifugal pump. Based on the previous parameterized modeling, the internal flow field of the double suction centrifugal pump has been calculated and analyzed by FLUENT software. At the same time, the optimization scheme of impeller is discussed. The results of this paper are as follows: 1) for the purpose of flow field analysis, the modeling scheme of impeller flow field region is analyzed and studied. 2) Parametric modeling is adopted, which greatly reduces the repeated work of impeller designers and improves the efficiency of design and production. On the basis of parameterized modeling, the internal flow field of double suction centrifugal pump is analyzed by commercial software FLUENT, which provides a basis for the optimization of impeller parameters of double suction centrifugal pump. The results show that it is feasible to analyze the internal flow field of centrifugal pump impeller by FLUENT software. On the basis of parametric modeling, the optimization scheme of impeller is discussed. For the centrifugal pump with low specific speed studied in this paper, the head of centrifugal pump can be greatly improved by adding bias short blade to the impeller, and a large number of numerical calculations show that the addition of short blade can reduce the wake area to a certain extent. But it does not necessarily improve the hydraulic performance of centrifugal pumps. The optimum inlet diameter of the bias short blade is 370 mm, the lift is 9.96 and the hydraulic efficiency is 0.74 mm.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH311

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