本文選題：液氣射流泵 + 歐拉雙流體模型�。� 參考：《大連交通大學(xué)》2012年碩士論文

【摘要】：概述了國內(nèi)外液氣射流泵的研究背景與發(fā)展現(xiàn)狀，利用液氣射流泵取代蒸汽噴射式制冷系統(tǒng)中的輔助噴射器與冷凝器，細致地分析了液氣射流泵系統(tǒng)的基本工作原理及其在蒸汽噴射式制冷系統(tǒng)中應(yīng)用的可行性。 液氣射流泵具有結(jié)構(gòu)簡單、安裝方便、運行節(jié)能、可靠性高、故障率低等優(yōu)點，在對整體設(shè)計方案分析和計算的基礎(chǔ)上，利用VB和Access數(shù)據(jù)庫編制了液氣射流泵的結(jié)構(gòu)尺寸計算程序。 傳統(tǒng)的以實驗為基礎(chǔ)的研究需要花費大量的人力、物力及財力，并且研究周期過長。相比之下，數(shù)值模擬作為一種可靠的研究途徑，具有時間短、成本低及見效快等優(yōu)點，，已在各行業(yè)中得到廣泛的應(yīng)用；目前對液氣射流泵的兩相流體混合進行二維仿真的比較多，而采用三維數(shù)值模擬的還比較少，本文采用空氣動力學(xué)仿真軟件FLUENT對該系統(tǒng)的核心部件液氣射流泵的內(nèi)部流體混合過程進行三維數(shù)值模擬。 首先采用繪圖軟件Pro/E構(gòu)建液氣射流泵的三維物理模型，然后將Pro/E軟件生成的物理模型導(dǎo)入FLUENT前處理軟件GAMBIT中進行網(wǎng)格劃分并設(shè)定流動計算所需的各種邊界條件，采用歐拉雙流體模型對液氣射流泵的混合過程進行仿真，通過對數(shù)值計算結(jié)果進行分析后，發(fā)現(xiàn)本文所設(shè)計的液氣射流泵抽真空的能力可以滿足冷凝器的真空度要求。 最后應(yīng)用FLUENT軟件對液氣射流泵內(nèi)部兩相流體流動混合過程進行仿真分析，通過對不同結(jié)構(gòu)尺寸（面積比、喉嘴距、長徑比）下的液氣射流泵性能進行分析比較，確定了液氣射流泵面積比、喉嘴距和長徑比的最優(yōu)范圍，為液氣射流泵的設(shè)計提供了一種可行的新方法。
[Abstract]:The research background and development status of liquid-gas jet pump at home and abroad are summarized. The auxiliary ejector and condenser in steam jet refrigeration system are replaced by liquid-gas jet pump. The basic working principle of the liquid-air jet pump system and the feasibility of its application in the steam jet refrigeration system are analyzed in detail. The liquid-air jet pump has the advantages of simple structure, convenient installation, energy-saving operation, high reliability, low failure rate, etc. On the basis of the analysis and calculation of the overall design scheme, Using VB and Access database, the calculation program of the structure dimension of the liquid-air jet pump is compiled. Traditional experimental-based research takes a lot of manpower, material and financial resources, and the research cycle is too long. In contrast, numerical simulation, as a reliable research approach, has the advantages of short time, low cost and quick effect, and has been widely used in various industries. At present, there are many two-dimensional simulations of two-phase fluid mixing in liquid-air jet pumps, but few use three-dimensional numerical simulation. In this paper, the aerodynamics simulation software FLUENT is used to simulate the internal fluid mixing process of the liquid-gas jet pump, which is the core of the system. Firstly, the three-dimensional physical model of liquid-gas jet pump is constructed by using Pro/E software, then the physical model generated by Pro/E software is imported into FLUENT pre-processing software GAMBIT for grid division and various boundary conditions for flow calculation are set up. Eulerian two-fluid model is used to simulate the mixing process of liquid-gas jet pump. Through the analysis of the numerical results, it is found that the vacuum capacity of the liquid-gas jet pump designed in this paper can meet the vacuum requirement of the condenser. Finally, FLUENT software is used to simulate and analyze the mixing process of two-phase fluid flow in the liquid-gas jet pump, and the performance of the liquid-gas jet pump under different structure dimensions (area ratio, throat distance, length to diameter ratio) is analyzed and compared. The optimum range of the area ratio, throat distance and aspect ratio of the liquid-gas jet pump is determined, which provides a new feasible method for the design of the liquid-gas jet pump.
【學(xué)位授予單位】：大連交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH38

【引證文獻】

相關(guān)博士學(xué)位論文 前1條

1 姚云;噴射器內(nèi)氣液流動與混合性能的研究[D];青島科技大學(xué);2009年

本文編號：1859037