Fluidelastic Instabilities in Tube Bundles Exposed to Nonuniform Crossflow

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Description

A mathematical model is presented for fluidelastic instabilities in tube bundles exposed to nonuniform crossflow to develop an equivalent flow velocity. The model incorporates all motion-dependent fluid forces based on the unsteady flow theory. Published fluid-force coefficients are compiled and examined; all fluid-force coefficients are approximately independent of the reduced flow velocity when it is large but are strongly dependent on reduced flow velocity when it is lower. The unsteady flow model is used to show that the mode-weighted averaging method is valid for large reduced flow velocity, but that it is incorrect at lower reduced flow velocity. In the ... continued below

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vii, 57 p. : ill., charts

Creation Information

Chen, Shoei-Sheng & Chandra, S. June 1989.

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  • Main Title: Fluidelastic Instabilities in Tube Bundles Exposed to Nonuniform Crossflow
  • Added Title: ANL (Series)
  • Added Title: Argonne National Laboratory Report ANL-89/13
  • Series Title: Argonne National Laboratory Reports

Description

A mathematical model is presented for fluidelastic instabilities in tube bundles exposed to nonuniform crossflow to develop an equivalent flow velocity. The model incorporates all motion-dependent fluid forces based on the unsteady flow theory. Published fluid-force coefficients are compiled and examined; all fluid-force coefficients are approximately independent of the reduced flow velocity when it is large but are strongly dependent on reduced flow velocity when it is lower. The unsteady flow model is used to show that the mode-weighted averaging method is valid for large reduced flow velocity, but that it is incorrect at lower reduced flow velocity. In the lower reduced flow velocity range, an iterative procedure is needed to establish the critical flow velocity. The results from the unsteady flow model are compared with those of other mathematical models. A general procedure is recommended to predict the equivalent flow velocity under different situations.

Physical Description

vii, 57 p. : ill., charts

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Digitized from microfiche (1).

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  • June 1989

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  • Aug. 4, 2015, 8:33 a.m.

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Chen, Shoei-Sheng & Chandra, S. Fluidelastic Instabilities in Tube Bundles Exposed to Nonuniform Crossflow, report, June 1989; Argonne, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc282977/: accessed May 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.