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contributor authorM. J. Pettigrew
contributor authorC. E. Taylor
contributor authorB. S. Kim
date accessioned2017-05-08T23:30:48Z
date available2017-05-08T23:30:48Z
date copyrightNovember, 1989
date issued1989
identifier issn0094-9930
identifier otherJPVTAS-28315#466_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/105853
description abstractTwo-phase cross-flow exists in many shell-and-tube heat exchangers, such as condensers, reboilers and nuclear steam generators. An understanding of damping and of flow-induced vibration excitation mechanisms is necessary to avoid problems due to excessive tube vibration. Accordingly, we have undertaken an extensive program to study the vibration behavior of tube bundles subjected to two-phase cross-flow. In this paper we present the results of experiments on four tube bundle configurations; namely, normal triangular of pitch over diameter ratio, p/d , of 1.32 and 1.47, and parallel triangular and normal square of p/d of 1.47. The bundles were subjected to air-water mixtures to simulate realistic mass fluxes and vapor qualities corresponding to void fractions from 5 to 99 percent. Hydrodynamic mass and damping are discussed in Part 1 of this series of three papers. We found that hydrodynamic mass is roughly related to the homogeneous mixture density. The damping characteristics of all tube bundles are generally similar. Damping is maximum between 40 and 80 percent void fraction where the damping ratio reaches about 4 percent. The effect of mass flux is generally weak. Design guidelines are proposed for hydrodynamic mass and for damping.
publisherThe American Society of Mechanical Engineers (ASME)
titleVibration of Tube Bundles in Two-Phase Cross-Flow: Part 1—Hydrodynamic Mass and Damping
typeJournal Paper
journal volume111
journal issue4
journal titleJournal of Pressure Vessel Technology
identifier doi10.1115/1.3265705
journal fristpage466
journal lastpage477
identifier eissn1528-8978
keywordsDamping
keywordsVibration
keywordsCross-flow
keywordsMixtures
keywordsNuclear reactor steam generators
keywordsPorosity
keywordsShells
keywordsWater
keywordsMechanisms
keywordsCondensers (steam plant)
keywordsDensity
keywordsVapors
keywordsFlux (Metallurgy)
keywordsDesign
keywordsFlow-induced vibrations AND Heat exchangers
treeJournal of Pressure Vessel Technology:;1989:;volume( 111 ):;issue: 004
contenttypeFulltext


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