Control of volumetric flow-rate of ball valve using V-port

被引:47
作者
Chern, MJ [1 ]
Wang, CC [1 ]
机构
[1] Natl Taiwan Sci & Technol, Dept Mech Engn, Taipei 106, Taiwan
来源
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME | 2004年 / 126卷 / 03期
关键词
D O I
10.1115/1.1760536
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The control of volume flow rate in a ball valve is very important when a ball valve is utilized in a piping system. It is difficult to linearly control the flow rate in a ball valve without external devices. V-ports are employed to achieve this purpose. In order to investigate the effects of V-port on the volume flow rate and flow features, 3-D numerical simulations and experiments were conducted to observe the flow patterns and to measure performance coefficients when V-ports with various angles were used in a piping system. Three V-ports with angles 30 deg, 60 deg, and 90 deg were studied. It was found that V-ports with angles 30 deg and 60 deg make the flow rate proportional to the valve opening. However V-ports increase the pressure loss between the inlet and the exit of a ball valve. In addition, V-ports with a small angle such as 30 deg increase the possibility of cavitation compared with flows without V-ports.
引用
收藏
页码:471 / 481
页数:11
相关论文
共 11 条
[1]  
[Anonymous], 1976, ISA HDB CONTROL VALV
[2]  
CAMPAGNE VC, 2002, J FLUIDS ENG, V124, P765
[3]  
CHERN MJ, UNPUB J FLUIDS ENG
[4]   Predicting globe control valve performance - Part 1: CFD Modeling [J].
Davis, JA ;
Stewart, M .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2002, 124 (03) :772-777
[5]   Predicting globe control valve performance - Part II: Experimental verification [J].
Davis, JA ;
Stewart, M .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2002, 124 (03) :778-783
[6]   Three-dimensional analysis of partially open butterfly valve flows [J].
Huang, CD ;
Kim, RH .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 1996, 118 (03) :562-568
[7]   Transient fluid-structure interaction in a central valve [J].
Kerh, T ;
Lee, JJ ;
Wellford, LC .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 1997, 119 (02) :354-359
[9]   Flow investigation around a V-sector ball valve [J].
Merati, P ;
Macelt, MJ ;
Erickson, RB .
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2001, 123 (03) :662-671
[10]  
RICHARD CF, 1988, FUNDAMENTALS AIR POL, P290