Diffusion characteristics of liquid kerosene with heat transfer in a strut-equipped supersonic combustor. (February 2023)

• Record Type: Journal Article
• Authors: Feng, Guangjun; Zhang, Junlong; Chen, Muxin; Qiu, Hongchao; Bao, Wen
• Is Part Of: Acta astronautica. Volume 203(2023)
• Page Start: 246
• Page End: 251
• Publication Date: 2023-02
• Subjects: Diffusion characteristics -- Liquid-kerosene -- Evaporation -- Combustion heat-release -- Supersonic combustor; Astronautics -- Periodicals; Outer space -- Exploration -- Periodicals; Astronautics; Periodicals; 629.405
• DOI: 10.1016/j.actaastro.2022.12.007
• Languages: English
• ISSNs: 0094-5765

Abstract

Abstract: The diffusion characteristics of liquid kerosene in a supersonic combustor equipped with a thin strut under the effect of evaporation and combustion heat-release were discussed in this paper. A series of experiments and numerical simulations were carried out both in cold inflow ( T t = 300 K) and high enthalpy inflow ( T t = 1680 K). The experimental data of kerosene diffusion and combustion were captured by high-speed camera and schlieren equipment. Based on the Euler-Lagrangian method, the evaporation and diffusion process of liquid kerosene under different inflow and heat-release conditions were studied. Through the analysis of the basic data of the ground test and numerical simulation, the kerosene diffusion and penetration depth were obtained and analyzed. The results showed that the diffusion of kerosene vapor is affected by both the injection momentum and the evaporation momentum. The evaporation of liquid kerosene could effectively improve the penetration depth of kerosene vapor, and the maximum proportion could reach 60%. The combustion heat-release greatly enhanced the diffusion ability of kerosene vapor by increasing evaporation strength of liquid kerosene and pressure in the heat-release zone, and the diffusion and combustion of kerosene were positively coupled with each other. With the investigation in this paper, a mechanism on kerosene diffusion in the supersonic combustor was explained. Highlights: Kerosene diffusion characteristics were analyzed with evaporation characteristics. Evaporation momentum was defined and effect on kerosene diffusion was discussed. The enhancement of kerosene diffusion with combustion heat-release was discussed.