Investigation of transient heat transfer coefficients in quenching experiments

Journal Article · Thu Nov 01 00:00:00 EST 1990 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910490· OSTI ID:5416270

Osman, A M; Beck, J V ^[1]

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1. Michigan State Univ., East Lansing (USA)

Methodological and experimental aspects of the estimation of transient heat transfer coefficients in quenching experiments, using inverse heat transfer methods, were addressed and investigated. Beck's method was used for the estimation of the transient heat transfer coefficient history from interior transient temperature measurements during quenching. Experiments involved plunging a high-purity copper sphere into cooling baths without boiling. The sphere was instrumented with several interior thermocouples for measuring the transient temperature response during quenching. Water and ethylene glycol were investigated. The early transient values of the heat transfer coefficient history were found to be about 100-120% higher than the values predicted using well-known empirical correlations for free convection. The later time values were in good agreement with those predicted with empirical correlations. The transient inverse technique has the capability of estimating early transients and subsequent quasi-steady-state values of heat transfer coefficient in a single transient experiment.

• OSTI ID: 5416270
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Vol. 112:4; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
HEAT TRANSFER
MEASURING METHODS
THERMAL CONDUCTION
DATA
GLYCOLS
STEADY-STATE CONDITIONS
TRANSIENTS
WATER
ALCOHOLS
ENERGY TRANSFER
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
420400* - Engineering- Heat Transfer & Fluid Flow