Experimental study of heat transfer during quenching of a heated rod

Turki K. Almudhhi, Shikha A. Ebrahim, Fan Bill Cheung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Quenching experiments of a cylindrical rod were conducted in a distilled water pool in order to investigate the behavior of the critical heat flux (CHF) and the minimum heat flux (MHF). The effects of liquid subcooling, initial rod temperature, and surface condition on CHF and MHF were investigated during the quench process. The test specimen is a hollow stainless steel rod. The specimen has two thermocouples, one at the inner diameter and the other embedded inside the wall. Both thermocouples are located at the same axial elevation. During the experiment, all thermocouple readings were taken by a data acquisition system. In addition, a video was recorded by a high-speed video camera for visualization of the boiling phenomenon. The surface heat flux was calculated using a one-dimensional inverse heat conduction code at each location. It has been found that the MHF and CHF were significantly influenced by the degree of subcooling. However, the MHF and CHF values were almost independent of initial rod temperature and surface condition for the tested substrate material. The calculated surface heat flux based on each thermocouple location was found to be consistent during the film boiling regime. The inconsistency in the evaluated surface heat fluxes at both locations begins after the MHF point and reaches a maximum near the CHF. After the CHF point, the inconsistency decays dramatically. The variation in CHF values could be related to the axial conduction effect due to the large temperature gradient above and below the quench front.

Original languageEnglish (US)
Title of host publicationProceedings of the 3rd Thermal and Fluid Engineering Summer Conference, TFESC 2018
PublisherBegell House Inc.
Pages1019-1031
Number of pages13
ISBN (Electronic)9781567004724
DOIs
StatePublished - 2018
Event3rd Thermal and Fluid Engineering Summer Conference, TFESC 2018 - Fort Lauderdale, United States
Duration: Mar 4 2018Mar 7 2018

Publication series

NameProceedings of the Thermal and Fluids Engineering Summer Conference
Volume2018-March
ISSN (Electronic)2379-1748

Conference

Conference3rd Thermal and Fluid Engineering Summer Conference, TFESC 2018
CountryUnited States
CityFort Lauderdale
Period3/4/183/7/18

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Electrical and Electronic Engineering
  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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