Flow characteristics and dynamics of swing check valves in compressible flow applications (Part 2)

Book · Sun Dec 01 04:00:00 EST 1996

OSTI ID:403263

Botros, K K ^[1]; Roorda, O ^[2]

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1. Novacor Research and Technology Corp., Calgary, Alberta (Canada)
2. Nova Gas Transmission Ltd., Calgary, Alberta (Canada)

Part 2 of this paper is concerned with two aspects of the dynamic behavior of swing type check valves, namely: slamming of the disc and the maximum attainable reverse flow as the valve closes due to flow deceleration. Both aspects are well understood in incompressible flows, but not as well in compressible flow applications. A systematic approach in studying these phenomena in compressible flows is followed, and where possible, comparison with incompressible flow applications (e.g., water) is made. Both experimental and numerical investigations were carried out and results presented. Measurements were taken on an NPS 4 test rig in air and in water to provide fundamental comparisons of the two applications. The numerical investigation was based on the solution of the full equation of motion of the swing disc including damping and counterbalance weights, and utilizing the valve opening-flow characteristics model developed in Part 1 in a quasisteady manner. Transient flows in the connecting piping system upstream and downstream of the valve were analyzed based on the standard method of characteristics to solve the full one-dimensional conservation equations. Good agreement was obtained between numerical and experimental results which allowed further numerical investigations of the effects of various parameters in compressible flow applications.

• OSTI ID: 403263
• Report Number(s): CONF-960706--; ISBN 0-7918-1784-9
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
DYNAMICS
EQUATIONS OF MOTION
EXPERIMENTAL DATA
NATURAL GAS DISTRIBUTION SYSTEMS
NUMERICAL ANALYSIS
POSITIONING
THEORETICAL DATA
VALVES