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Detailed Measurements of Local Heat Transfer Coefficient and Adiabatic Wall Temperature Beneath an Array of Impinging Jets

1994; ASM International; Volume: 116; Issue: 3 Linguagem: Inglês

10.1115/1.2929423

1528-8900

Kenneth W. Van Treuren, Zifan Wang, Peter Ireland, T. V. Jones,

Combustion and flame dynamics

A transient method of measuring the local heat transfer under an array of impinging jets has been developed. The use of a temperature-sensitive coating consisting of three encapsulated thermochromic liquid crystal materials has allowed the calculation of both the local adiabatic wall temperature and the local heat transfer coefficient over the complete surface of the target plate. The influence of the temperature of the plate through which the impingement gas flows on the target plate heat transfer has been quantified. Results are presented for a single in-line array configuration over a range of jet Reynolds numbers.