FLUID TRANSIENTS IN A PIPELINE WITH ONE END OPEN

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Water hammer during multi-phase flow is rather complex, but in some cases an upper limit to the pressure surge magnitude during water hammer can be estimated. In the case considered here, a two mile long pipeline with a single high point was permitted to partially drain. Due to gravitational effects, air bubbles up through the pipe line to its highest point, but the time required for air to reach the top of the pipe is rather long. Consequently, some transients caused by valve operations are affected by air entrapment and some are not. The intent of this research was to ... continued below

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Leishear, R June 9, 2008.

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Water hammer during multi-phase flow is rather complex, but in some cases an upper limit to the pressure surge magnitude during water hammer can be estimated. In the case considered here, a two mile long pipeline with a single high point was permitted to partially drain. Due to gravitational effects, air bubbles up through the pipe line to its highest point, but the time required for air to reach the top of the pipe is rather long. Consequently, some transients caused by valve operations are affected by air entrapment and some are not. The intent of this research was to investigate the complex interactions between air, water vapor, and liquid during water hammer in a long pipe with one end of the pipe open to atmospheric conditions. To understand the system dynamics, experimental data was obtained from a long pipeline with an open end and also from a short, transparent tube. Transient calculations were performed for valve closures and pump operations as applicable. The limitations of available calculation techniques were considered in detail.

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  • 2008 ASME Pressure Vessels and Piping Division Conference

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  • Report No.: PVP2008-61130
  • Grant Number: DE-AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 933164
  • Archival Resource Key: ark:/67531/metadc895649

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Office of Scientific & Technical Information Technical Reports

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  • June 9, 2008

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 2, 2016, 5:22 p.m.

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Leishear, R. FLUID TRANSIENTS IN A PIPELINE WITH ONE END OPEN, article, June 9, 2008; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc895649/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.