The role of additive manufacturing for the hot section components of gas turbine engines grows ever larger as progress in the industry continues. The opportunity for the heat transfer community is to exploit the use of additive manufacturing in developing nontraditional cooling schemes to be built directly into components. This study investigates the heat transfer and pressure loss performance of additively manufactured wavy channels. Three coupons, each containing channels of a specified wavelength (length of one wave period), were manufactured via direct metal laser sintering (DMLS) and tested at a range of Reynolds numbers. Results show that short wavelength channels yield high pressure losses, without corresponding increases in heat transfer, due to the flow structure promoted by the waves. Longer wavelength channels offer less of a penalty in pressure drop with good heat transfer performance.
Heat Transfer and Pressure Loss Measurements in Additively Manufactured Wavy Microchannels
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received July 12, 2016; final manuscript received July 18, 2016; published online September 13, 2016. Editor: Kenneth Hall.
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Kirsch, K. L., and Thole, K. A. (September 13, 2016). "Heat Transfer and Pressure Loss Measurements in Additively Manufactured Wavy Microchannels." ASME. J. Turbomach. January 2017; 139(1): 011007. https://doi.org/10.1115/1.4034342
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