【作者】 苏华山；

【导师】 杨国来；

【作者基本信息】 兰州理工大学 ， 机械电子工程， 2011， 硕士

【摘要】 为了分析液力变矩器的流场特性,文章对YJ某型液力变矩器进行建模和数值模拟。模型采用多叶排全流道的瞬态几何模型,仿真得出的数据和实测力矩数据进行对比,结果表明应用多叶排流道全流道的几何模型具有较高的准确性和可靠性。本文的主要内容有:1)介绍了液力变矩器的发展历史、应用范围、传动原理及研究现状。2)分析计算流体力学的基本流动方程以及湍流的模型理论。3)用PROE软件对液力变矩器进行三维实体造型,获得液力变矩器各个工作轮流场模型,然后使用GAMBIT进行网格划分前处理,得到理想的离散网格。4)对流道进行一些假设,在FLUENT中设置边界条件,选择合适的湍流模型以及解算模型,设置收敛条件,调整松弛因子,并进行了各个工况下的流场的数值计算。5)据FLUENT计算结果,分析在二个典型工况下,各个工作轮流道的速度和压力分布、进口面流线特征。针对其分布特点,分别对泵轮、涡轮、导轮提出一些改进方案。并且对变矩器流场进行了综合分析。6)数值模拟液力变矩器内流场,并与试验结果相对照,验证分析数值模拟准确性,深刻揭示液力变矩器内流场特征形态及工作机理;7)全文进行总结:本课题的研究突破了原有一元束流设计理论,可以缩短设计周期、减少试验次数、提高设计精度、改善产品的传动效率,对新产品设计开发和现有产品改型提供强有力的技术支撑。更多还原

【Abstract】 For analysysing the Flow Field of Torque Converter,the paper established a mathematical model and simulated the numerical value of YJ series certain hydrodynamic torque converter. Model adopted leafy row full port of geometric model ,simulation of a set of data that compared with the measured torque data ,results show that application leafy row full-port geometric model flow with higher accuracy and reliability.The main content of this article:1) introduces the development history of the torque converter, application scope, transmission principle and research actuality.2) the computational fluid dynamics analysis the basic flow equation and the turbulent model theory.3) sing PROE software of the converter for 3d entity model , Get torque converter each work take turns field model analysis, then use the flow field GAMBIT for before meshing processing, get ideal discrete grid.4) Some assumptions to port in FLUENT, of setting boundary conditions, choose appropriate turbulence model for calculating model, and set up convergence conditions, adjust the flabby factors, and various working conditions of flow field of the numerical calculation.5) According to the FLUENT the computed results, analysis in two typical working conditions, each work turns the speed and the pressure distribution ways, import surface streamline features. In view of its distribution characteristics respectively, the pump wheels, turbine, put forward some improvement scheme keep-off device. And the torque converter flow field were analysed.6) umerical simulation hydraulic torque converter internal flow field, and compared with the results contrast, validating analysis numerical simulation accuracy, deeply reveal hydraulic torque converter internal flow field characteristics form and work mechanism.7) To generalize were summarized in this paper:This topic research breaking the original unary beam design theory, can shorten the design cycle, reduce test times, improve the design accuracy and improve the transmission efficiency of products, product design and retrofit existing products provide strong technical support.更多还原