Heat Transfer Correlation Model of Pyrolytic Supercritical Aviation Kerosene RP-3

The pyrolytic reaction of fuel at high temperature can effectively improve the heat absorption capacity of the regenerative cooling system. However, due to the coupling effect between pyrolysis and heat and mass transfer process, the traditional heat transfer correlation model has a large deviation when describing the heat transfer characteristics of fuel cracking reaction process. In this paper, a dimensionless derivation of the governing equations is carried out to find the connection between dimensionless numbers, and the correction coefficient of the reaction rate constant is introduced. Thus, a method of heat transfer correlation modeling considering the influence of pyrolysis reaction is proposed. Compared with the numerical simulation results, it is found that the maximum deviation between the prediction value of the traditional correlation models and the numerical simulation result is more than 20%. The maximum deviation of the correlation model proposed in this paper is 4% for the pyrolysis process with low conversion rate. The maximum deviation of the heat transfer correlation model proposed for the reaction process with medium and high conversion rate is 3%. © 2023 Science Press. All rights reserved.