發(fā)布時(shí)間：2019-02-08 17:05

【摘要】：中高比轉(zhuǎn)速離心泵的葉輪設(shè)計(jì)多采用一元理論，且少有研究，本文采用二元有勢(shì)流動(dòng)理論設(shè)計(jì)中高比轉(zhuǎn)速離心泵葉輪，并與傳統(tǒng)的采用一元理論設(shè)計(jì)的葉輪進(jìn)行對(duì)比，分析其內(nèi)部流動(dòng)及外特性。本文采用CFD計(jì)算軟件Fluent6.3，對(duì)基于兩種設(shè)計(jì)方法的葉輪的流體計(jì)算域模型進(jìn)行全流場(chǎng)三維湍流數(shù)值模擬，旨在研究葉輪二元理論（ωu=0）的設(shè)計(jì)，對(duì)比葉輪內(nèi)部流動(dòng)狀態(tài)以及對(duì)其性能的影響規(guī)律，本課題的主要研究?jī)?nèi)容和所做的主要工作如下： 1、根據(jù)離心泵的基本設(shè)計(jì)參數(shù)，首先基于傳統(tǒng)的離心泵一元設(shè)計(jì)理論，設(shè)計(jì)了1號(hào)葉輪；然后基于ωu=0的二元設(shè)計(jì)理論，選取了六種速度矩分布規(guī)律，完成了2號(hào)~7號(hào)葉輪的水力設(shè)計(jì)。 2、對(duì)設(shè)計(jì)得到的七個(gè)葉輪方案進(jìn)行精確的全流道三維實(shí)體造型和網(wǎng)格劃分，為全流道內(nèi)部流動(dòng)CFD數(shù)值模擬計(jì)算及其性能預(yù)測(cè)的準(zhǔn)確性奠定可靠的基礎(chǔ)。 3、CFD數(shù)值模擬采用雷諾時(shí)均Navier-Stockes方程和標(biāo)準(zhǔn)k ε湍流模型，利用SIMPLEC算法，對(duì)采用兩種設(shè)計(jì)理論設(shè)計(jì)的七個(gè)葉輪的離心泵進(jìn)行了全流場(chǎng)數(shù)值模擬，進(jìn)一步處理1號(hào)～4號(hào)模型的計(jì)算數(shù)據(jù)，得到葉片沿軸面流線的軸面速度和速度矩分布，，將不同葉輪設(shè)計(jì)理論假設(shè)的速度分布與真實(shí)流場(chǎng)的速度分布進(jìn)行了對(duì)比分析。 4、分別對(duì)采用一元理論和二元理論設(shè)計(jì)的葉輪的離心泵，在0.4Q、0.6Q、0.8Q、1.0Q、1.2Q等不同流量運(yùn)行工況進(jìn)行了數(shù)值模擬對(duì)比，得到了1號(hào)～4號(hào)模型方案內(nèi)部流場(chǎng)的壓力分布和速度分布，比較了兩種方案的外特性數(shù)值模擬結(jié)果。 本課題的主要?jiǎng)?chuàng)新點(diǎn)如下： 1、采用二元理論設(shè)計(jì)了中高比轉(zhuǎn)速離心泵葉輪，對(duì)比分析了兩種設(shè)計(jì)理論的假設(shè)與真實(shí)流動(dòng)規(guī)律的差異。 2、設(shè)計(jì)出了一個(gè)較為接近二元有勢(shì)流動(dòng)規(guī)律的葉輪，對(duì)比分析了葉輪內(nèi)部流體進(jìn)出口速度矩值與葉輪能量頭和效率的關(guān)系。 由于時(shí)間、條件和本人經(jīng)驗(yàn)不足所限，本課題做的工作有限，有很多工作目前還沒有進(jìn)行到位。文中給出的基于二元設(shè)計(jì)理論的葉輪的水力設(shè)計(jì)，尤其是葉片上速度矩的取值和分布，還有很大的提升空間，有待于以后繼續(xù)深入研究和探討。
[Abstract]:The impeller design of medium and high specific speed centrifugal pump is mostly based on the monadic theory, and few studies have been done. In this paper, binary potential flow theory is used to design the impeller of the centrifugal pump with middle and high specific rotational speed, and it is compared with the traditional impeller designed by univariate theory. Its internal flow and external characteristics are analyzed. In this paper, three dimensional turbulent numerical simulation of impeller fluid computational domain model based on two design methods is carried out by using CFD software Fluent6.3,. The purpose of this paper is to study the design of impeller binary theory (蠅 UO). Comparing the internal flow state of impeller and the influence law on its performance, the main research contents and main work of this subject are as follows: 1. According to the basic design parameters of centrifugal pump, firstly, based on the traditional centrifugal pump monolithic design theory, The impeller No. 1 is designed. Then based on the dual design theory of omega 0, the hydraulic design of impeller No. 2 ~ 7 is completed by selecting six laws of velocity and moment distribution. 2. The three dimensional solid modeling and mesh division of the seven impeller schemes were carried out, which laid a reliable foundation for the CFD numerical simulation of the flow inside the channel and the accuracy of the performance prediction. Using Reynolds time averaged Navier-Stockes equation and standard k 蔚 turbulence model, the full flow field of a centrifugal pump with seven impellers designed by two design theories was simulated by using SIMPLEC algorithm. Further processing the calculation data of model 1 ~ 4, the axial velocity and velocity moment distribution of blade along the axial streamline are obtained. The velocity distribution of different impeller design theory hypotheses is compared with the velocity distribution of real flow field. 4. The centrifugal pump with impeller designed by univariate theory and binary theory is numerically simulated and compared under different flow operating conditions, such as 0.4Q0. 6Q / 0. 8Q / 1. 2Q, etc. The pressure distribution and velocity distribution of the flow field in model No.1 ~ 4 are obtained and the numerical simulation results of the external characteristics of the two schemes are compared. The main innovations of this paper are as follows: 1. The impeller of centrifugal pump with medium and high specific speed is designed by using binary theory, and the differences between the hypotheses and the real flow laws of the two design theories are compared and analyzed. 2. A impeller which is close to the law of binary potential flow is designed, and the relationship between the inlet and outlet moment of fluid and the energy head and efficiency of impeller is compared and analyzed. Due to the limitation of time, condition and experience, the work of this subject is limited, and a lot of work has not been done yet. In this paper, the hydraulic design of impeller based on binary design theory, especially the value and distribution of velocity moment on blade, still has a lot of lifting space, which needs to be further studied and discussed in the future.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH311

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張莉,陳漢平,徐忠;離心壓縮機(jī)葉輪內(nèi)部流場(chǎng)的準(zhǔn)三元迭代數(shù)值分析[J];風(fēng)機(jī)技術(shù);2000年05期

2 黃建德;離心泵葉輪參數(shù)對(duì)進(jìn)口回流的影響[J];工程熱物理學(xué)報(bào);1998年04期

3 李新宏,何慧偉,宮武旗,黃淑娟;離心通風(fēng)機(jī)整機(jī)定常流動(dòng)數(shù)值模擬[J];工程熱物理學(xué)報(bào);2002年04期

4 王企鯤,戴韌,陳康民;蝸殼進(jìn)口周向非均勻流動(dòng)的數(shù)值研究[J];工程熱物理學(xué)報(bào);2003年02期

5 王企鯤,戴韌,陳康民;離心風(fēng)機(jī)梯形截面蝸殼內(nèi)旋渦流動(dòng)的數(shù)值分析[J];工程熱物理學(xué)報(bào);2004年01期

6 顧春偉;陳美蘭;李雪松;奉凡;;DES模型在壓氣機(jī)葉柵中的應(yīng)用研究[J];工程熱物理學(xué)報(bào);2008年12期

7 張人會(huì),張學(xué)靜,楊軍虎;非設(shè)計(jì)工況下葉輪進(jìn)口附近的流動(dòng)及其控制[J];甘肅工業(yè)大學(xué)學(xué)報(bào);2003年04期

8 李文廣,蘇發(fā)章,黎義斌,趙偉國(guó);軸流泵葉片設(shè)計(jì)中葉輪出口液體速度矩分布[J];蘭州理工大學(xué)學(xué)報(bào);2005年03期

9 楊軍虎;張建華;孫慶沖;王曉暉;;葉片型線及厚度變化規(guī)律對(duì)離心泵性能的影響[J];蘭州理工大學(xué)學(xué)報(bào);2011年05期

10 曹樹良,梁莉,祝寶山,陸力;高比轉(zhuǎn)速混流泵葉輪設(shè)計(jì)方法[J];江蘇大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年03期

相關(guān)博士學(xué)位論文 前1條

1 王海松;軸流泵CAD-CFD綜合特性研究[D];中國(guó)農(nóng)業(yè)大學(xué);2005年

相關(guān)碩士學(xué)位論文 前2條

1 潘光星;長(zhǎng)短葉片離心泵三維湍流數(shù)值模擬與PIV測(cè)試研究[D];揚(yáng)州大學(xué);2008年

2 胡家昕;超低比轉(zhuǎn)速高速離心泵復(fù)合式葉輪內(nèi)部流動(dòng)及其性能研究[D];蘭州理工大學(xué);2010年

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