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  本文關(guān)鍵詞： 離心泵 三維PIV 數(shù)值模擬 內(nèi)部流場　出處：《浙江理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,粒子圖像測速技術(shù)(PIV,Particle Image Velocimetry)發(fā)展比較迅速,該技術(shù)應(yīng)用范圍比較廣泛,已成為研究復(fù)雜流場的一種有效測試手段。 雖然很多學(xué)者在離心泵內(nèi)部流動方面研究比較多,對離心泵內(nèi)部的流動結(jié)構(gòu)和流動規(guī)律也有了一些認(rèn)識,但由于離心泵內(nèi)部流動比較復(fù)雜,許多流動現(xiàn)象的流場結(jié)構(gòu)和產(chǎn)生機理仍不是太清楚,因此還需做大量相關(guān)的研究工作。為了揭示離心泵內(nèi)部流動的規(guī)律,及其外特性規(guī)律,本文采用數(shù)值模擬與試驗研究相結(jié)合的方法,研究離心泵內(nèi)部流動規(guī)律,為離心泵的設(shè)計和改進提供了一定的理論依據(jù)。 本文的主要工作如下: (1)系統(tǒng)概述了國內(nèi)外學(xué)者在離心泵方面的研究成果及現(xiàn)狀。 (2)利用Pro/E三維造型軟件進行葉輪、蝸殼實體造型,并在Gambit軟件中進行網(wǎng)格劃分后,導(dǎo)入Fluent軟件進行泵內(nèi)流動數(shù)值模擬,并對結(jié)果進行了分析。 (3)搭建了一套同時滿足水泵外特性試驗和PIV測試要求的試驗臺,并在轉(zhuǎn)速為2900r/min工況下,進行水泵的外特性試驗,得到了水泵的性能曲線,與數(shù)值模擬預(yù)測結(jié)果進行對比,兩者在總體上基本吻合。 (4)利用PIV技術(shù),分別在0.4、1.0和1.2倍設(shè)計流量的工況下,對離心泵葉輪內(nèi)部流場進行試驗研究。測試窗口分別取在三個不同的葉槽中,在每個葉槽中選取兩個斷面(中截面和距離前蓋板為5mm的截面)。在測得葉輪內(nèi)部的絕對速度矢量后,按照速度三角形原理對絕對速度進行分解,從而得到了相對速度分量,對其進行分析,揭示了葉輪內(nèi)部流場的分布規(guī)律。根據(jù)試驗結(jié)果可知,采用三維PIV技術(shù)對離心泵內(nèi)部的流場進行研究是可行的,能夠反映離心泵內(nèi)部實際情況的三維流場,其研究成果可為離心泵設(shè)計提供重要的參考。
[Abstract]:In recent years, particle Image velocimetry (PIV) has developed rapidly and has been widely used. It has become an effective method to study complex flow field. Although many scholars have more research on the flow inside the centrifugal pump and have some understanding of the flow structure and the flow law inside the centrifugal pump, but the flow inside the centrifugal pump is more complex. The flow field structure and generation mechanism of many flow phenomena are still not clear, so a lot of related research work is needed. In order to reveal the internal flow law of centrifugal pump and its external characteristics. In this paper, the method of numerical simulation and experimental study is used to study the internal flow law of centrifugal pump, which provides a certain theoretical basis for the design and improvement of centrifugal pump. The main work of this paper is as follows: 1) the research results and present situation of centrifugal pump are summarized systematically at home and abroad. (2) the impeller and volute are modeled with Pro/E 3D modeling software, and the flow in pump is simulated with Fluent software after meshing in Gambit software. The results are analyzed. At the same time, a set of test bench was built to meet the requirements of pump external characteristic test and PIV test, and the external characteristic test of pump was carried out under the condition of 2900r / min rotational speed. The performance curves of the pump are obtained and compared with the numerical simulation results, which are in good agreement with each other. The flow field of centrifugal pump impeller is studied by using PIV technology under the conditions of 0.4U 1.0 and 1.2 times design flow rate, respectively. The test window is taken in three different vane slots. Two sections (the middle section and the section with 5 mm distance from the front cover) were selected in each blade slot. After the absolute velocity vector was measured, the absolute velocity was decomposed according to the principle of velocity triangle. The relative velocity component is obtained, and the distribution law of the flow field in the impeller is revealed. According to the experimental results, it is feasible to study the flow field in the centrifugal pump by using three-dimensional PIV technology. The three-dimensional flow field can reflect the actual situation of centrifugal pump, and the research results can provide an important reference for the design of centrifugal pump.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH311

【引證文獻】

相關(guān)碩士學(xué)位論文 前1條

1 千勃興;離心泵葉輪葉片的有限元分析及優(yōu)化[D];西北農(nóng)林科技大學(xué);2013年

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本文編號：1469542