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Vol. 102, Issue 3, March 2009, pp.105-114

 

 

Bullet

 

The Effect on Pressure Drop across Control Valve for Two Phase Flow (Air-Water)

 

Arivazhagan M., Krishna Karthik K., *Sundaram S.

Department of Chemical Engineering, National Institute of Technology, Tiruchirapalli-620015, India

*Department of Electronics and Instrumentation, SASTRA University, Thanjavur, India

Tel.: +91431-2503111, +91-9487412478

E-mail: ariva@nitt.edu

 

 

 

Received: 22 October 2008   /Accepted: 24 March 2009   /Published: 31 March 2009

 

Abstract: Two-phase flow of water-air mixture through a pneumatic control valve for varying openings and varying ratios of flow rates was studied. The pressure drop increased with air-water ratio and the degree of variation depended on the valve opening. The friction factor decreases with Reynolds number and was also a function of valve opening. Two phase multiplier was correlated to Lockhart-Martinelli parameter and was decreasing as found in literature. Valve characteristics in terms of lift and fraction of maximum flow with quality as parameter showed that air water ratio drastically changed the characteristics.

 

Keywords: Control valve, Lockhart-martenelli parameter, Air-water system, Quality

 

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