The laminar burning velocity of propyl acetate at high pressures and temperatures

• Published in: Fuel (Guildford) 2024-11, Vol.375, p.132600, Article 132600
• Main Authors: Oppong, Francis, Liu, Yangxun, Li, Xiaolu, Xu, Cangsu, Li, Yuntang
• Format: Article
• Language: English
• Subjects: Biofuel; Burning flux; Constant volume method; Laminar burning velocity; Propyl acetate
• ISSN: 0016-2361
• DOI: 10.1016/j.fuel.2024.132600

•Laminar combustion characteristics of propyl acetate were studied.•The burning flux increased with increasing initial pressures and temperatures.•Empirical correlations were established to predict the burning velocity at elevated conditions.•Burning velocity at 8 bar and 534 K were obtained for propyl acetate. Since propyl acetate has the potential to be used as a biofuel in heat engines, it is necessary to ascertain and comprehend its combustion properties. Using equivalence ratios of 0.7–1.4, the laminar burning velocity of propyl acetate was studied in the constant volume combustion vessel at the initial pressures of 1, 2, and 4 bar and initial temperatures of 390 K, 420 K, and 450 K. The constant volume method was used to determine the burning velocity via extrapolations at the initial condition. In addition, a ten-fitted empirical correlation was formulated to calculate the burning velocity for pressures and temperatures as high as 8 bar and 534 K, respectively. The extrapolated burning velocity showed good agreement with the numerical simulation burning velocity, and the correlated burning velocity agreed well with the extrapolated burning velocity. The laminar burning flux was also investigated and was ascertained that laminar burning flux increases as the initial pressure and temperature increase. The fuel mixture density significantly influences the burning flux as the initial pressure rises, whereas the laminar burning velocity has a notable impact on the burning flux as the initial temperature rises. In summary, this study advances our knowledge of propyl acetate combustion, particularly concerning its flame propagation at higher pressures and temperatures and its potential application in combustion engines, and the data are of great engineering value for developing and understanding the combustion science of propyl acetate.