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所在平台: Udemy |
课程主页: https://www.udemy.com/course/journal-bearing-cfd-analysis-and-validation/
课程评论：没有评论
**课程名称：** 轴承CFD分析与验证 **课程概述：** 本课程将深入探讨轴承在机械设备中的重要作用，特别以汽车发动机曲轴中的轴瓦为例。课程将介绍不同类型的轴承，并重点聚焦于轴瓦 (Journal Bearing)。我们将学习与轴瓦相关的关键术语，如偏心、偏心率和间隙。此外，课程还将详细介绍本次课程中用于数值模拟的轴瓦设计参数。 **课程内容亮点：** * **基础理论：** * 轴承种类及应用 * 轴瓦工作原理及关键参数（偏心、偏心率、间隙） * 轴瓦设计参数的讨论 * **流体动力学基础：** * 材料属性介绍 * 流态分析（层流与湍流） * 索末菲数 (Sommerfeld Number) 及其优化参数（参考Shigley's Mechanical Engineering Design Book） * **CFD建模与仿真：** * 流体模型选择：全索末菲、半索末菲或多相流空化模型 * CAD建模：使用Spaceclaim创建几何模型 * 网格划分：使用ICEMCFD创建六面体网格 * 仿真求解：在Fluent中进行问题设置与求解 * **结果后处理与验证：** * 结果可视化：在Fluent和CFD-Post中进行后处理，包括绘制轴瓦圆周静压分布图（压力 vs 角度，0-360度） * 关键参数计算：反向计算轴承载荷（通过最大静压和最大静压比估算）、最大静压和零压力的角位置 * **结果验证：** 将CFD仿真得到的结果与Shigley's Mechanical Engineering Design Book中的数据进行比对，并展示两者高度吻合，证明验证的成功。 **学习目标：** 完成本课程后，学员将能够熟练运用CFD技术对轴瓦进行数值分析，并通过与经典工程设计手册中的数据进行比对，有效地验证仿真结果的准确性。
Journal bearing is an important component of any machine such as in crankshaft of automobile engine. It helps to reduce friction and allow motion in required direction and restrict them in other direction. There is different type of bearings such as ball bearing, roller bearing, journal bearing etc. In this course we are going to solve numerically journal bearing with given conditions and geometric parameters. At the end of course you will validate CFD results shown in this course with data from Shigley's Mechanical Engineering Design Book.First, we will start with discussion on bearings and types. Then we will discuss about the journal bearings, different terms such as eccentricity, eccentricity ratio, clearance. We will also discuss the design parameters for journal bearing solved in this course as well. After that we will discuss about the material properties, whether flow is laminar or turbulent, Sommerfeld number and corresponding optimum parameters from Shigley's book. We will also go through modelling approaches such a full Sommerfeld, half Sommerfeld or cavitation modelling through multiphase modelling in CFD. Then we will create geometry in Spaceclaim, hexa mesh in ICEMCFD and subsequently problem setup and simulation in Fluent.After solving problem in Fluent, we will obtain results by post processing in Fluent and CFD post. Specially plotting the static pressure around circumference of journal and displaying it as pressure vs angular coordinates from 0 to 360 degrees. We will also find out the value of loading on bearing in reverse fashion by finding out the value of maximum pressure and maximum pressure ratio of film thickness. We will also show the angular position of maximum pressure and zero pressure. We will compare them with data we get from Shigley's Mechanical Engineering Design Book. I have found that resultss are matching very well and thus validation is done perfectly.
