Reference Work Entry

VDI Heat Atlas

Part of the series VDI-Buch pp 1553-1586

O2 Vibration of Tube Bundles in Heat Exchangers

  • Horst GelbeAffiliated withVDI-Gesellschaft Verfahrenstechnik und Chemieingenieurwesen (VDI-GVC)Technische Universität Berlin
  • , Samir ZiadaAffiliated withMcMaster University

1 Introduction

Flow-induced vibrations are examined for tube bundles with gas, liquid, or gas–liquid mixture cross-flows. The effect of the axial flow or the flow inside the tubes is generally negligible, except in the case of tubes with a long length between the supports and small stiffness, such as thin-walled plastic tubes (of which the procedure to evaluate the vibration is given in [1]). The guidelines in the Sect. 5 deal with the design requirements for standard heat exchangers in chemical and process industries, but not, however, with the additional requirements to ensure long service lives for equipments such as those used in nuclear and conventional power plants.

1.1 Tube Vibration Response and Critical Parameters

Even at relatively low flow velocities, the tube arrays in heat exchangers exhibit turbulent buffeting vibrations due to cross flow. The vibration amplitude increases as fluid density increases. If the amplitude exceeds a critical level Ak, long-term damage ...

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