Flame stabilization characteristics in the supersonic combustor based on a circular cross-section strut

• DOI: 10.1063/5.0186980
• Publication Date: 2024-01-12T11:35:21Z
• Authors: Menglei Li; Bin An; Mingbo Sun; Peibo Li; Yanan Wang; Changhai Liang; Jiaoru Wang; Jikai Chen; Yizhi Yao
• Keywords: 0203 mechanical engineering; 02 engineering and technology

Flame stabilization characteristics in the supersonic combustor with a circular cross-section strut were experimentally investigated. The Mach number, stagnation pressure, and temperature of inflow 2.52, 1.60 MPa, 1486 K, respectively. Compared to wedge-shaped recirculation flow at base rectangular strut, conical possessed more favorable geometry characterized by longer length, larger volume, small surface. When fueled hydrogen, equipped both could achieve self-sustaining combustion. In tests equivalence ratios 0.08 0.12, time-averaged flame chemiluminescence intensity was higher than its counterpart 80% 53%, Nevertheless, standard deviations intensities showed an opposite trend. Therefore, reaction zone downstream vigorous stable. kerosene hydrogen supplied combustor, these two struts failed stabilize flame. Although unsteady hydrogen–kerosene witnessed it extinguished within 2 ms because too small. Shock wave generators employed enhance ability cross section. experimental results suggested that shock significantly enlarged created region high pressure. achieved generators.