Abstract
An altered form of the transient technique used by Schultz and Jones [1] for measuring heat transfer coefficient has been successfully applied in a steady flow cascade with the step change in temperature created by plunging a prechilled blade into the hotter cascade flow. Results obtained from thin film sensors mounted on the surface of a turbine rotor blade show excellent agreement with theory in the leading edge region and on the pressure surface. In the suction surface trailing edge zone, 30% to 100% chord, theory predicts severe separation whilst the sensors show this flow regime occurring far later, i.e. 70% to 80% chord and with lesser magnitude. The technique has general application for determining the convective heat transfer coefficient in most flow fields at moderate cost and with times between successive measurements being of the order of 20 minutes.
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References
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Smith, G.D.J., Snedden, G.C., Stieger, R.D. (1999). Advances in the Measurement of Convective Heat Transfer Coefficient in Gas Turbine Applications. In: Bejan, A., Vadász, P., Kröger, D.G. (eds) Energy and the Environment. Environmental Science and Technology Library, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4593-0_15
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DOI: https://doi.org/10.1007/978-94-011-4593-0_15
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