本文關(guān)鍵詞：基于葉片載荷分布的離心泵水力性能研究　出處：《浙江理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 離心泵 圓柱葉片 葉片載荷分布 數(shù)值模擬 水力性能

【摘要】：離心泵在國民經(jīng)濟(jì)中的各個(gè)部門有著重要的地位,葉輪作為離心泵中的核心部件,其性能的好壞直接影響離心泵甚至整個(gè)工業(yè)流程的性能,因此離心泵葉輪的內(nèi)部流動(dòng)和優(yōu)化設(shè)計(jì)一直被研究者所關(guān)注。本文以一圓柱形葉片離心泵作為研究對(duì)象,對(duì)葉片載荷分布與離心泵水力性能之間的關(guān)系進(jìn)行了深入研究。1.采用Solidworks三維軟件對(duì)離心泵進(jìn)行建模,采用ICEM和Workbench相結(jié)合對(duì)模型泵進(jìn)行混合網(wǎng)格劃分,然后通過網(wǎng)格無關(guān)性分析,確定合理的網(wǎng)格數(shù)進(jìn)行后續(xù)的數(shù)值計(jì)算。2.對(duì)原模型泵進(jìn)行非定常數(shù)值計(jì)算,將數(shù)值計(jì)算結(jié)果與實(shí)驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比,驗(yàn)證數(shù)值計(jì)算方法的可靠性和準(zhǔn)確性。3.通過數(shù)值計(jì)算結(jié)果,繪制出0.2Q_d~1.0Q_d九種不同流量工況下的葉片載荷曲線。分析流量變化對(duì)葉片載荷分布的影響,對(duì)設(shè)計(jì)流量工況下的葉片載荷曲線進(jìn)行三段式擬合,然后根據(jù)此載荷曲線對(duì)原型泵進(jìn)行反設(shè)計(jì),并對(duì)原型泵與反設(shè)計(jì)泵進(jìn)行了對(duì)比分析。4.在保證葉片總加載載荷不變的前提下,調(diào)整葉片載荷主加載區(qū)斜率,設(shè)計(jì)9種不同葉片載荷分布的葉輪。采用SSTκ-ω湍流模型對(duì)離心泵進(jìn)行整機(jī)非定常數(shù)值計(jì)算,分析不同葉片載荷分布下離心泵的揚(yáng)程、效率、徑向力、內(nèi)部流動(dòng)和壓力脈動(dòng)情況�？偨Y(jié)分析葉片載荷主加載區(qū)斜率變化對(duì)離心泵水力性能的影響。5.在保證葉片總加載載荷不變的前提下,調(diào)整葉片載荷分布,設(shè)計(jì)4種模型,進(jìn)一步分析葉片載荷前加載點(diǎn)位置以及后加載點(diǎn)的位置和大小對(duì)離心泵水力性能的影響。
[Abstract]:Centrifugal pump of various departments in the national economy plays an important role, as a core component of impeller of centrifugal pump, its performance directly affects the performance of the centrifugal pump and the industrial process, so the internal flow and optimization design of centrifugal pump impeller has been concerned by researchers. In this paper, a cylindrical blade centrifugal pump as the object of study, the relationship between the hydraulic performance of centrifugal pump blade load distribution and the in-depth research on the.1. modeling of centrifugal pump using Solidworks 3D software, the model of the pump are mixed mesh using ICEM and Workbench combination, and then through the grid independence analysis, determine the number of grid reasonable for subsequent numerical unsteady numerical calculation of.2. of the original model pump, the numerical results are compared with experimental data, numerical calculation method to verify the reliability and accuracy of.3. The results of numerical calculation, draw the blade load curve 0.2Q_d~1.0Q_d nine different flow conditions. The analysis of flow change on the influence of blade load distribution, the three section of the blade load curve fitting design flow conditions, then according to the load curve of the prototype pump reverse design, and the prototype of the pump and pump reverse design compared the.4. in the premise of ensuring the total blade load constant, adjust the blade load loading slope design, 9 different blade load distribution of impeller. Using SST k-omega turbulence model of centrifugal pump for the unsteady numerical analysis of different blade load distribution under centrifugal pump lift and efficiency radial force, internal flow and pressure pulsation. Analysis of blade load loading area slope change on the hydraulic performance of centrifugal pump.5. to ensure constant load leaves total summary On the premise of adjusting blade load distribution, 4 models are designed to further analyze the influence of loading point location and location and size of rear loading point on hydraulic performance of centrifugal pump.

【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH311

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本文編號(hào)：1379049