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A Parametric Experimental Study on the Heat Transfer Characteristics of Supercritical Kerosene in Active Cooling Channels of Scramjets

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Abstract:

Heat transfer characteristics of China RP-3 kerosene under supercritical state were experimentally investigated. Results showed that at sub-critical pressures, heat transfer deterioration happens, and the wall temperature rises from approximately 350°C to 750°C. This is thought to be resulted from film boiling when kerosene begins to transfer from liquid to gas. At supercritical pressures, heat transfer enhancement was observed. And it is mainly caused by the sharp increase of specific heat of kerosene when the wall temperature is approaching the critical temperature of kerosene. The heat transfer coefficient doesnt increase with velocity for kerosene, because the thermal properties and residence time of kerosene have changed when velocity is changed.

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Periodical:

Advanced Materials Research (Volumes 774-776)

Pages:

252-257

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.774-776.252

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Online since:

September 2013

Authors:

Ning Wang, Jin Zhou, Yu Pan, Hui Wang

Keywords:

Active Cooling, Heat Transfer, Scramjet, Supercritical Kerosene

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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