【摘要】：為了分析液力變矩器的流場特性,文章對(duì)YJ某型液力變矩器進(jìn)行建模和數(shù)值模擬。模型采用多葉排全流道的瞬態(tài)幾何模型,仿真得出的數(shù)據(jù)和實(shí)測力矩?cái)?shù)據(jù)進(jìn)行對(duì)比,結(jié)果表明應(yīng)用多葉排流道全流道的幾何模型具有較高的準(zhǔn)確性和可靠性。 本文的主要內(nèi)容有: 1)介紹了液力變矩器的發(fā)展歷史、應(yīng)用范圍、傳動(dòng)原理及研究現(xiàn)狀。 2)分析計(jì)算流體力學(xué)的基本流動(dòng)方程以及湍流的模型理論。 3)用PROE軟件對(duì)液力變矩器進(jìn)行三維實(shí)體造型,獲得液力變矩器各個(gè)工作輪流場模型,然后使用GAMBIT進(jìn)行網(wǎng)格劃分前處理,得到理想的離散網(wǎng)格。 4)對(duì)流道進(jìn)行一些假設(shè),在FLUENT中設(shè)置邊界條件,選擇合適的湍流模型以及解算模型,設(shè)置收斂條件,調(diào)整松弛因子,并進(jìn)行了各個(gè)工況下的流場的數(shù)值計(jì)算。 5)據(jù)FLUENT計(jì)算結(jié)果,分析在二個(gè)典型工況下,各個(gè)工作輪流道的速度和壓力分布、進(jìn)口面流線特征。針對(duì)其分布特點(diǎn),分別對(duì)泵輪、渦輪、導(dǎo)輪提出一些改進(jìn)方案。并且對(duì)變矩器流場進(jìn)行了綜合分析。 6)數(shù)值模擬液力變矩器內(nèi)流場,并與試驗(yàn)結(jié)果相對(duì)照,驗(yàn)證分析數(shù)值模擬準(zhǔn)確性,深刻揭示液力變矩器內(nèi)流場特征形態(tài)及工作機(jī)理; 7)全文進(jìn)行總結(jié): 本課題的研究突破了原有一元束流設(shè)計(jì)理論,可以縮短設(shè)計(jì)周期、減少試驗(yàn)次數(shù)、提高設(shè)計(jì)精度、改善產(chǎn)品的傳動(dòng)效率,對(duì)新產(chǎn)品設(shè)計(jì)開發(fā)和現(xiàn)有產(chǎn)品改型提供強(qiáng)有力的技術(shù)支撐。
[Abstract]:In order to analyze the flow field characteristics of hydraulic torque converter, a YJ hydraulic torque converter is modeled and simulated in this paper. The transient geometric model of multi-blade exhaust channel is used in the model, and the simulation data are compared with the measured moment data. The results show that the geometric model of multi-blade flow channel full channel has high accuracy and reliability. The main contents of this paper are as follows: 1) the development history, application scope, transmission principle and research status of hydraulic torque converter are introduced. 2) the basic flow equation of computational fluid mechanics and the model theory of turbulence are analyzed. 3) the three-dimensional solid modeling of hydraulic torque converter is carried out with PROE software, and the flow field models of each working wheel of hydraulic torque converter are obtained, and then the ideal discrete grid is obtained by using GAMBIT before grid division. 4) some assumptions are made about the flow channel, the boundary conditions are set in FLUENT, the appropriate turbulence model and solution model are selected, the convergence conditions are set, the relaxation factor is adjusted, and the numerical calculation of the flow field under each working condition is carried out. 5) according to the results of FLUENT calculation, the velocity and pressure distribution of each working rotation channel and the streamline characteristics of the inlet surface are analyzed under two typical working conditions. According to its distribution characteristics, some improvement schemes are put forward for pump wheel, turbine and guide wheel respectively. The flow field of torque converter is analyzed comprehensively. 6) the numerical simulation of the flow field in the hydraulic torque converter is carried out, and compared with the experimental results, the accuracy of the numerical simulation is verified, and the characteristic morphology and working mechanism of the flow field in the hydraulic torque converter are deeply revealed. 7) the full text summarizes: the research of this subject breaks through the original unidimensional beam design theory, which can shorten the design cycle, reduce the number of tests, improve the design accuracy and improve the transmission efficiency of the product. Provide strong technical support for new product design and development and existing product modification.
【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】：2011
【分類號(hào)】：TH137.332

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