水力测功机瞬态特性研究  

Research on the transient characteristics of hydraulic dynamometer

作　　者：孟明站 杨帅[1] 吴大转[1] 郑枫 潘燚 MENG Mingzhan;YANG Shuai;WU Dazhuan;ZHENG Feng;PAN Yi(College of Energy Engineering,Zhejiang University,Hangzhou 310027,China;Kunming Branch of Xi'an Precision Machinery Research Institute,Kunming 650101,China)

机构地区：[1]浙江大学能源工程学院,杭州310027 [2]西安精密机械研究所昆明分部,昆明650101

出　　处：《流体机械》2022年第6期71-77,共7页Fluid Machinery

基　　金：国家自然科学基金项目(51839010)。

摘　　要：为了研究水力测功机瞬态启动过程的加载特性,采用三维计算流体动力学(CFD)方法,通过建立水力测功机的三维全流域模型,使用网格滑移技术对水力测功机启动过程进行模拟,分析了不同加载时间和加载方式下水力测功机的瞬态性能。研究结果表明,水力测功机瞬态启动过程流场相比于稳态过程具有明显的滞后性。且启动加速度越大,加载时间越短,流场的滞后效应越明显,同转速下的吸收扭矩越小。In order to study the loading characteristics of the hydraulic dynamometer during the transient start-up process,the three-dimensional computational fluid dynamics(CFD)method was adopted.A complete three-dimensional full-flow domain model of the hydraulic dynamometer was established.Then the grid slip technology was used to simulate the startup process of the hydraulic dynamometer in order to analyze the transient performance of the hydraulic dynamometer at different loading times and under loading methods.The research results show that the flow field in the transient startup process of the hydraulic dynamometer has obvious hysteresis compared with the steady-state process.And the larger the starting acceleration,the shorter the loading time,more obvious the hysteresis effect of the flow field,and the smaller the absorbed torque at the same rotational speed.

关 键 词：水力测功机 数值模拟 滞后效应 启动特性 

分 类 号：TH3[机械工程—机械制造及自动化] TK477[动力工程及工程热物理—动力机械及工程]