Fluid-damping-controlled instability of tubes in crossflow

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A mathematical model for fluid damping controlled instability of tubes presented in this paper is based on the unsteady flow theory. Motion dependent fluid forces are measured in a water channel. From the measured fluid forces, fluid stiffness and fluid damping coefficients, are calculated as a function of reduced flow velocity, oscillation amplitude, and Reynolds number. Once these coefficients are known, the mathematical model can be applied to predict structural instability due to fluid damping. Many cases are considered: single tube, twin tubes, tube row, triangular array, and square arrays. The results show the instability regions based on the fluid ... continued below

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61 p.

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Chen, S. S.; Cai, Y. & Srikantiah, G. S. November 1, 1997.

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Description

A mathematical model for fluid damping controlled instability of tubes presented in this paper is based on the unsteady flow theory. Motion dependent fluid forces are measured in a water channel. From the measured fluid forces, fluid stiffness and fluid damping coefficients, are calculated as a function of reduced flow velocity, oscillation amplitude, and Reynolds number. Once these coefficients are known, the mathematical model can be applied to predict structural instability due to fluid damping. Many cases are considered: single tube, twin tubes, tube row, triangular array, and square arrays. The results show the instability regions based on the fluid damping coefficients and provide the answers to a series of questions on fluid elastic instability of tube arrays in crossflow.

Physical Description

61 p.

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INIS; OSTI as DE97008664

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  • International mechanical engineering congress and exposition, Dallas, TX (United States), 16-21 Nov 1997

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  • Other: DE97008664
  • Report No.: ANL/ET/CP--92179
  • Report No.: CONF-971115--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 292841
  • Archival Resource Key: ark:/67531/metadc674579

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  • November 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Oct. 31, 2016, 4:22 p.m.

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Chen, S. S.; Cai, Y. & Srikantiah, G. S. Fluid-damping-controlled instability of tubes in crossflow, article, November 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc674579/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.