The impact of water slugs on wet steam flowmeters

Owen, I., Hussein, I. B. and Amini, A. M. (1991) The impact of water slugs on wet steam flowmeters. Flow Measurement and Instrumentation, 2 (2). pp. 98-104. ISSN 0955-5986

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The damage that can be inflicted on a flowmeter that has been installed into a steam distribution system without having a water separator upstream of it to offer protection is considered. The situation examined is one where a body of liquid accumulates behind a closed valve in a piping system carrying a wet or condesing gas, then the valve is suddenly opened to expose the slug of liquid to the high pressure gas. The motion of the slug under these circumstances has been analysed and compared with slug velocities measured in a 50 mm pipe. The pressures generated when slugs impact upon three different sizes of orifice plate have been measured and correlated in terms of the sytem variables. These pressures are seen to be considerable; for example a 2.16 m slug propelled by a source pressure of 10 bar (1 MPa) will generate a pressure of about 300 barr when impacting on an orifice plate with an area ratio of 0.250. When the orifice plate is preceded by a water separator, the impact pressures fall to about one tenth of the corresponding case with no separator. © 1991.

Keywords:Wet steam flowmeters, Water slugs, Water separator, Orifice plate
Subjects:H Engineering > H141 Fluid Mechanics
Divisions:College of Science > School of Engineering
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ID Code:18293
Deposited On:08 Aug 2015 17:38

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