TIME DEPENDENT PIPE FORCES CAUSED BY BLOWDOWN AND FLOW STOPPAGE

Formulations are developed in this study for rapid estimates of time-and-space-dependent pipe reaction forces caused by either sudden blow-down or flow stoppage in a fluid piping system. The analytical model is a uniform pipe with arbitrary bends and friction, a pressure source at one end, and a sudden opening or closing valve at the other end. A homogeneous mixture of liquid and ideal gas flows in the system. The method of characteristics is used to obtain fluid-mechanical properties, which then are employed to predict associated pipe loads. A graphical summary of results includes initial and steady blowdown forces, wave propagation forces, and local force-time behavior. The formulations presented are expected to provide a basis for confident, efficient, and economical design of pipe system layout and motion restraints.

• Supplemental Notes:
  • To be published in ASME Transactions-Journal of Fluids Engineering.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Moody, F J
• Publication Date: 1973-8

Subject/Index Terms

• TRT Terms: Pipe; Pipe flow; Piping systems; Stresses; Vibration
• Old TRIS Terms: Pipe stresses; Pipe vibration
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00051806
• Record Type: Publication
• Source Agency: American Society of Mechanical Engineers
• Report/Paper Numbers: #73-FE-23 Paper
• Files: TRIS
• Created Date: Mar 18 1974 12:00AM