Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in Cooling Channel of Regeneratively-Cooled Scramjet

Version 1 : Received: 2 February 2024 / Approved: 2 February 2024 / Online: 2 February 2024 (14:42:04 CET)

A peer-reviewed article of this Preprint also exists.

Xu, Q.; Lin, G.; Li, H.; Feng, Y. Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in the Cooling Channel of a Regeneratively Cooled Scramjet. Appl. Sci. 2024, 14, 2508. Xu, Q.; Lin, G.; Li, H.; Feng, Y. Dynamic Flow and Heat Transfer Characteristics of Uncracked Hydrocarbon Fuel under Super-Critical Pressure in the Cooling Channel of a Regeneratively Cooled Scramjet. Appl. Sci. 2024, 14, 2508.

Abstract

Regeneratively cooled scramjet has already been successfully verified as propulsion device for hypersonic vehicle. As a result, dynamic process of flow and heat transfer in cooling channel is commonly occurred which may bring hazard and control difficulties for scramjet. To study transient flow and heat transfer process in cooling channel, a dynamic numerical model is established. Dynamic characteristics of flow and heat transfer under different conditions are calculated and discussed, which includes change of inlet fuel mass flow, heat flux and pressure working conditions. Results show that stable time of cooling channel outlet fuel temperature is related to the change rate of inlet mass flow and heat flux. The stable time of outlet fuel temperature under heat flux decreasing working conditions are about 12.5 s. The initial response of working pressure fluctuation will lead to fuel temperature fluctuation, which has little effect on wall temperature.

Keywords

Hydrocarbon fuel; Transient heat transfer; Uncracked; Scramjet

Subject

Engineering, Energy and Fuel Technology

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