本文選題：離心泵 + 固液兩相流　； 參考：《浙江理工大學(xué)》2014年碩士論文

【摘要】：固液兩相流離心泵是輸送固液混合物的重要設(shè)備之一，廣泛應(yīng)用于生產(chǎn)生活的各個(gè)領(lǐng)域當(dāng)中，比如城市供水，，石油化工輸送，水利清淤以及農(nóng)業(yè)灌溉等方面。然而隨著固液泵的廣泛應(yīng)用，在實(shí)際工程應(yīng)用過程中存在許多不足：過流部件磨損嚴(yán)重、偏離設(shè)計(jì)工況運(yùn)行導(dǎo)致能耗過大以及效率偏低等。考慮到兩相流動(dòng)的復(fù)雜性，兩相流的理論研究以及水力機(jī)械設(shè)計(jì)還有很大的提升空間，流道內(nèi)很多固液兩相流動(dòng)的規(guī)律還有待深入系統(tǒng)的研究。工程實(shí)際中的大部分設(shè)計(jì)是依靠經(jīng)驗(yàn)，因此不能很好地保證設(shè)計(jì)出的泵的水力性能。所以，基于數(shù)值模擬的方法對(duì)泵的內(nèi)部流動(dòng)進(jìn)行深入研究非常有意義，可為設(shè)計(jì)出工作性能高、運(yùn)行穩(wěn)定并且能耗低的固液泵提供理論參考。 本文通過實(shí)驗(yàn)與數(shù)值計(jì)算相結(jié)合的方法，以期進(jìn)一步認(rèn)識(shí)固液泵內(nèi)部流動(dòng)的規(guī)律以及固相參數(shù)對(duì)離心泵內(nèi)部流場和外特性的影響，這將有助于對(duì)泵進(jìn)行優(yōu)化設(shè)計(jì)，提高其性能。 本文的主要內(nèi)容： 1使用Pro/E對(duì)離心泵葉輪和蝸殼流道進(jìn)行三維建模，利用Gambit對(duì)三維模型進(jìn)行網(wǎng)格劃分，最后利用Fluent進(jìn)行離心泵多工況清水?dāng)?shù)值計(jì)算，分析得出不同工況下泵內(nèi)部流場分布情況，并且與多工況清水實(shí)驗(yàn)結(jié)果進(jìn)行對(duì)比。 2計(jì)算離心泵固液兩相定常流動(dòng)，從固相顆粒本身性質(zhì)出發(fā)研究固相顆粒運(yùn)動(dòng)及離心泵內(nèi)部流體流動(dòng)的規(guī)律以及內(nèi)部磨損機(jī)理，并且定性分析這些因素對(duì)泵外特性的影響。 3計(jì)算離心泵固液兩相非定常流動(dòng)，獲得不同時(shí)刻泵內(nèi)部流場分布以及固體顆粒運(yùn)動(dòng)及其對(duì)離心泵過流部件磨損的規(guī)律，分析不同時(shí)刻泵外特性的變化。
[Abstract]:Solid liquid two phase flow centrifugal pump is one of the important equipment for transporting solid and liquid mixtures. It is widely used in various fields of production and life, such as urban water supply, petrochemical transportation, water conservancy silting and agricultural irrigation. However, with the wide application of solid-liquid pump, there are many shortcomings in the practical application process: overcurrent components. In view of the complexity of the two phase flow, the theoretical study of two phase flow and the design of hydraulic machinery still have a lot of room to improve. Many laws of solid-liquid two phase flow in the flow channel are still to be studied in depth. Most of the design in engineering practice is based on the design of the engineering practice. Depending on experience, the hydraulic performance of the designed pump can not be guaranteed very well. Therefore, it is of great significance to study the internal flow of the pump based on the numerical simulation method. It can provide a theoretical reference for the design of a solid liquid pump with high performance, stable operation and low energy consumption.
In this paper, a combination of experiments and numerical calculations is used to further understand the law of the internal flow of the solid liquid pump and the effect of the solid state parameters on the flow field and external characteristics of the centrifugal pump. This will help to optimize the design of the pump and improve its performance.
The main contents of this article are as follows:
1? Using Pro/E to model the three-dimensional model of centrifugal pump impeller and volute channel, using Gambit to mesh the three-dimensional model, and finally using Fluent to calculate the water flow of the centrifugal pump in multiple working conditions. The distribution of the internal flow field in the pump under different working conditions is analyzed and compared with the results of the water experiment in multiple working conditions.
2? Calculation of solid-liquid two-phase constant flow in centrifugal pump. The law of solid particle motion and internal fluid flow in centrifugal pump and internal wear mechanism are studied from the properties of solid particles, and the effects of these factors on the pump characteristics are qualitatively analyzed.
3? Calculating the unsteady flow of solid-liquid two phase flow in a centrifugal pump, obtaining the distribution of the flow field inside the pump at different time, the movement of solid particles and the wear of the over current parts of the centrifugal pump, and analyzing the changes of the external characteristics of the pump at different times.
【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】：2014
【分類號(hào)】：TH311

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