泥沙直径对旋转圆盘装置空化性能的影响研究  

Study on the Influence of Sediment Diameter to the Cavitation Characteristics in a Rotating Disk

作　　者：李玉山 宁望望 蔡建国 韩洋 赵雷 张雷[5] 葛新峰[3] LI Yushan;NING Wangwang;CAI Jianguo;HAN Yang;ZHAO Lei;ZHANG Lei;GE Xinfeng(Gansu Geological Engineering Investigation Institute/Gansu Geology Mineral Reconnoitres Development Institute Hydrogeology and Engineering Geology Investigation Institute,Zhangye 734000,China;Xi’an Thermal Engineering Research Institute Co.,Ltd.,Xi’an 710000,China;College of Energy and Electricity,Hohai University,Nanjing 210098,China;Chongqing Shipping Construction Development Co.,Ltd.,Chongqing 500000,China;Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China)

机构地区：[1]甘肃省地质矿产勘查开发局水文地质工程地质勘察院,甘肃张掖734000 [2]西安热工研究院有限公司,陕西西安710000 [3]河海大学能源与电气学院,江苏南京210098 [4]重庆航运建设发展(集团)有限公司,重庆500000 [5]黄河水利科学研究院,河南郑州450003

出　　处：《人民黄河》2021年第8期135-138,共4页Yellow River

基　　金：国家自然科学基金面上项目(51579080);中央高校基本科研业务费资助项目(2015B02814)。

摘　　要：空化会造成水力机械发生振动,效率下降,而影响空化的因素有很多。为了研究不同泥沙直径对旋转圆盘空化性能的影响,使用SST k-ω湍流模型和Zwart-Gerber-Belamri空化模型对某一卧式旋转圆盘进行全流道三相流动数值模拟。结果表明:旋转圆盘空蚀源附近压力最大值随泥沙直径的增大而减小;当泥沙直径小于0.040 mm时,压力差随泥沙直径的增大而减小,而当泥沙直径大于0.040 mm时,压力差随泥沙直径先快速增大后基本不变;泥沙分布最少的区域为试件所放置的位置,且随着泥沙直径的增大,旋转圆盘空蚀源附近的最大泥沙体积分数和面积均快速增大;当泥沙直径小于0.060 mm时,旋转圆盘的空化受抑制,当泥沙直径大于0.060 mm时,旋转圆盘的空化受促进。Cavitation will cause vibration and decrease efficiency of hydraulic machinery,and there are many factors affecting cavitation.In order to study the influence of different sediment diameters to the cavitation characteristics of rotating disk,in this paper,SST turbulence model and Zwart-Gerber-Belamri cavitation model were used to simulate the three-phase flow in a horizontal rotating disk.Under the condition of 0.06,the influence of different diameters to the cavitation characteristics in the rotating disk was simulated.The pressure characteristics,sediment distribution and the cavitation volume fraction in the rotating disk were analyzed.The results show that the maximum pressure near the cavitation source is decreased with the increase of sediment diameter;when the diameter is less than 0.04 mm,the pressure difference is decreased with the increase of sediment diameter;when the diameter of sediment is greater than 0.04 mm,the pressure difference is increased rapidly with the increase of sediment diameter first and then basically remains unchanged;the area with the least sediment distribution is the place where the specimen is placed and with the increase of sediment diameter.When the diameter of sediment is less than 0.06 mm,the cavitation of rotating disk is restrained,and when the diameter of sediment is greater than 0.06 mm,the cavitation of rotating disk is promoted.

关 键 词：旋转圆盘 泥沙直径 空化性能 泥沙分布 

分 类 号：TK72[动力工程及工程热物理—流体机械及工程] TV136[水利工程—水力学及河流动力学]