Influences of oscillation on the physical stability and explosion characteristics of solid‒liquid mixed fuel

• Published in: Defence technology 2024-10, Vol.40, p.191-198
• Main Authors: Zhang, Chi, Song, Ge, Guo, Hui, Ren, Jiafan, Bai, Chunhua
• Format: Article
• Language: English
• Subjects: Aluminum; Coal; Data acquisition systems; Explosion characteristics; Explosions; Liquid fuels; Overpressure; Physical properties; Physical stability; Solid‒liquid mixed fuel; Stability; Stratification
• ISSN: 2214-9147; 2096-3459; 2214-9147
• DOI: 10.1016/j.dt.2024.05.014

The stratification phenomenon resulting from differences in the physical properties of solid‒liquid components seriously affect the final combustion and explosion characteristics of mixed fuel under the action of oscillation. The effects of oscillation on the physical stability of mixed fuel with two solid‒liquid ratios and three liquid component distribution ratios have been investigated using a self-designed experimental system at oscillation frequencies of 60–300 r/min. The explosion characteristics of mixed fuel before and after oscillation are gained from a 20 L spherical explosion container system. When the mass ratio of liquid components is controlled at 66.9%, 64.7%, 62.6% the final explosion characteristics are stable, with a maximum difference of only 0.71%. The volume of liquid fuel precipitation increases with increasing oscillation frequency when the mass ratio of liquid components reaches 71.7%, 69.6%, 67.7%. The fuel explosion overpressure after oscillation decreases with increasing liquid precipitation volume, and the repeatability is poor, with a maximum standard deviation of 82.736, which is much higher than the ratio without stratification. Properly controlling the mass ratio of liquid components of the mixed fuel can effectively combat the impact of oscillation on the physical state and maintain the stability of the final explosion characteristics. •The volume of precipitation is influenced by the composition ratio and is positively correlated with overpressure reduction.•The stratification of fuel weakens the explosion stability.•The delay in the occurrence time of peak overpressure is one of the reasons that affects the explosion characteristics.•Adjusting the mass ratio of liquid can overcome the influence of oscillation and maintain the characteristics of fuel explosion.