典型槽式孔板流量计的数值模拟研究  

Study on numerical simulation of the typical slotted orifice flowmeter

作　　者：朱小龙 韩涛翼 ZHU Xiaolong;HAN Taoyi(School of Energy and Power Engineering,Nanjing University of Aeronautics ＆ Astronautics,Nanjing 210016, China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《能源化工》2018年第2期7-12,共6页Energy Chemical Industry

基　　金：南京航空航天大学研究生创新基地(实验室)开放基金项目资助(kfjj20160205);江苏省普通高校研究生科研创新计划项目(SJLX16_0096)

摘　　要：通过数值模拟的方法研究了孔板厚度对槽式孔板流量计内部流场及流出系数的影响。在雷诺数从3×104到9×104的范围内,对不同的直径比(β=0.4,0.5,0.6)和不同孔板厚度(E=0.05D,0.12D,0.18D)的槽式孔板流量计进行了研究。结果表明:与标准孔板流量计相比,槽式孔板流量计对孔板厚度的变化更敏感;同时,β越大,槽式孔板流量计的流出系数变化越明显。在本项目的研究范围内,当孔板厚度由0.05D增加到0.12D时,β为0.4,0.5和0.6的槽式孔板流量计的流出系数分别增大了4.31%~6.04%,4.92%~6.66%和5.87%~7.57%。当孔板厚度由0.12D继续增大到0.18D时,β为0.4的流量计流出系数基本不变,而β为0.5和0.6的流量计流出系数分别增大了0~0.87%和0.33%~1.79%。The influence of the orifice thickness on the flow field and the discharge coefficient of the slotted orifice flowmeter is studied by numerical simulation. In the range of Reynolds numbers from 3×104 to 9×104,the slotted orifice flowmeter with different diameter ratios（ β = 0. 4,0. 5,0. 6） and different orifice thicknesses（ E = 0. 05 D,0. 12 D,0. 18 D） are investigated. The results show that compared with the standard orifice flowmeter,the slotted orifice flowmeter is more sensitive to the change of the thickness of the orifice plate. At the same time,the bigger the β the more obvious of the discharge coefficient of the slotted orifice flowmeter will change. In this study,when the orifice thickness is increased from 0. 05 D to 0. 12 D,the discharge coefficient of the slotted orifice flowmete with βof 0. 4,0. 5,0. 6 are increased by 4. 31%-6. 04%,4. 92%-6. 66%,5. 87%-7. 57%,respectively. When the orifice thickness continues to increase from 0. 12 D to 0. 18 D,the discharge coefficient of the slotted orifice flowmeter with β of 0. 4 is basically unchanged,while the flowmeter with β of 0. 5,0. 6 are increased by 0-0. 87%,0. 33%-1. 79%,respectively.

关 键 词：槽式孔板流量计 流出系数 数值模拟 孔板厚度 标准孔板流量计 

分 类 号：TQ056.15[化学工程]