Thermal and Hydraulic Effects of Coke Deposit in Hydrocarbon Pyrolysis Process

Abstract

Fuel pyrolysis can be of benefit for regenerative cooling techniques due to its endothermic effect in ensuring the thermal resistance of hypersonic vehicles and structures. Among pyrolysis species production, there is that of coke formation. A numerical code is used in this paper to investigate the related phenomena, based on two experiments using Titanium (Ti) and Stainless Steel ( 1 Associate Professor, PRISME, nicolas.gascoin@bourges.univ-orleans.fr, AIAA member. 2 Doctor, PRISME. 3 Professor, PRISME.

Numerical Investigation of the Thermal Behavior of Cracked RP-3 in Rectangular Cooling Channels under Different Inclinations

“…For the thermal protection of scramjets, regenerative cooling has been widely associated with advantages in weight and cost compared to passive thermal protection, film cooling, and their combinations . The principle of regenerative cooling is to cool down the inner wall of the combustion chamber with flowing aviation kerosene, which participates in combustion afterward . Aviation kerosene normally works at a supercritical state, where the physical parameters dramatically vary with the pressure and temperature of the flow field .…”

“… 1 The principle of regenerative cooling is to cool down the inner wall of the combustion chamber with flowing aviation kerosene, which participates in combustion afterward. 2 Aviation kerosene normally works at a supercritical state, where the physical parameters dramatically vary with the pressure and temperature of the flow field. 3 During the process of regenerative cooling, when the kerosene temperature exceeds a threshold level, complex thermal cracking occurs, obviously impacting the fuel heat transfer and combustion efficiency.…”