Impingement Heat Transfer of Reciprocating Jet Array

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  • SU Lo May
    Department of Electrical Engineering, Tung Fang College of Technology and Commerce
  • CHANG Shyy Woei
    Thermal Fluids Laboratory, National Kaohsiung Institute of Marine Technology
  • CHIOU Shyr Fuu
    Teaching assistant and Msc student, Department of Marine Engineering, National Kaohsiung Institute of Marine Technology

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説明

This paper describes an experimental study of impingement heat transfer of reciprocating jet-array with piston cooling application for marine heavy-duty diesel engine. A selection of heat transfer measurements illustrates the manner by which the individual and interactive influences of reciprocating force and buoyancy on heat transfer for the impinging jet-array. It is demonstrated that the reciprocating force coupled with buoyancy interaction causes considerable heat transfer modifications from the static results. The isolated reciprocating force effect could initially reduce heat transfer to a level about 0.45 of static level with weak reciprocation but recovers when the reciprocating force increases. Heat transfer improvement and impediment could be aided by the location-dependent buoyancy effect in addition to the reciprocating force effect. An empirical heat transfer correlation, which is physically consistent, has been developed to permit the evaluation of the individual and synergistic effects of reciprocating force and buoyancy interaction on local heat transfer of the impinging jet-array.

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