Systematic Analysis on Gas‐Liquid‐Solid Three‐Phase Flow and Initiation Structure for Fuel‐Air Explosive Weapon Reliability

Abstract

The missile safety and reliability play important roles in its evaluation and design. Failure or inaccuracy of initiation is an occasional but extremely troublesome hazard in weapon system safety. The uneven fuel distribution and uncontrollable motion of initiation structure are both the causations of this hazard in a double-event fuel-air explosive missile application. Thus, it is crucial to implement the coupling between the initiation structure and the fuel field to succeed in a reliable application. This paper employs CFD to simulate the explosive dispersal process of fuel and uses MATLAB to investigate the motion trajectory of the initiation structure. As for the solid-liquid fuel com-posed of 50 % aluminum powder and 50 % propylene oxide, its optimal concentration for reliable initiation is 186 275 g/m 3 . In the case of a 200 kg missile with a speed of 300 m/s, the results imply that, at 250 ~300 ms which is a reliable initiation time, the initiation structure gets to the reliable range of 10.8 ~14.1 m where the fuel concentration approaches to the optimal range for initiation. Ultimately, for any missile development, the coupled simulation-based approach is summarized to prevent the initiation failure and enhance its inherent safety, so as to avoid accident casualties and property loss.

Optimization of Ejection Characteristics for Twice-Detonating Device in Double-Event Fuel-Air Explosive with High Drop Velocity

“…The dynamic explosive characteristics were studied, in the influence of the initial drop velocity on the fuel dispersal radius and cloud de range. Ye and Zhang [23,24] theoretically proposed a dynamic detonation metho a TDD controlled by a decelerating chute was set on the top of the DEFAE, and tablished a nonlinear calculation model for the description of the motion state of t Using the developed MATLAB graphical user interface, the influences of several ters on the TDD motion process were studied. However, due to the difficulty of p control in practice, the application of this method under a high drop velocity nee further verified.…”

Numerical calculation of shock wave overpressure produced by multiple cloud detonation

“…, 2018; Ren and Zhang, 2023; Song and Zhang, 2019; Wang et al. , 2004, 2021; Ye and Zhang, 2022). The simultaneous detonation of multiple cloud produces a large range of overpressure field, which is conducive to leveraging the explosive energy advantage of FAE explosive (Deng et al.…”