Influence of pressure on the circumferential diffusion characteristics of fuel vapor and combustion performance in a pressurized burner. (March 2023)

• Record Type: Journal Article
• Authors: Liu, Li; Xing, Chang; Ye, Ran; Chen, Jiacheng; Yang, Wentao; Li, Aihan; Zhang, Linyao; Chen, Xiye; Qiu, Penghua
• Is Part Of: Case studies in thermal engineering. Volume 43(2023)
• Publication Date: 2023-03
• Subjects: Pressurized burner -- Fuel vapor -- Operation pressure -- Circumferential diffusion characteristics -- Buoyancy force -- Aerodynamic force; Heat engineering -- Case studies -- Periodicals; 621.40205
• DOI: 10.1016/j.csite.2023.102786
• Languages: English
• ISSNs: 2214-157X

Abstract

Abstract: To discuss the circumferential diffusion characteristics of the fuel vapor and combustion performance, a 15 kW pressurized burner fueled by diesel is first proposed in this research. And then, combustion experiments and cool-state numerical simulations are conducted at different pressures ( P ) and thermal loads ( Q ). The ratio ( F ) of the aerodynamic to buoyancy forces and the circumferential diffusion uniformity ( σ ) of the fuel vapor are constructed through pollutant emissions, fuel vapor concentration distribution and velocity field. The results show that under a Q of 3.55 kW, the burner has a relatively low F, and the buoyancy force has a more obvious effect as P increases, further causing circumferential fuel vapor distribution uniformity to suffer. When the burner operates at a Q of 10.64 kW, the undesired circumferential diffusion uniformity of the fuel vapor is only found at 0.3 MPa. For a Q of 15.37 kW, the fuel vapor has a great circumferential diffusion uniformity in the forward end of the liner at each P . A proper F of 89–278 and σ of 0–3.6% are recommended for diesel vapor circumferential diffusion and pollutant emissions, in which the buoyancy force has a relatively lower effect than the aerodynamic force.