Influence of typical metal powders on the shock wave effect and thermal damage performance of FAE

ZHANG Beibei; CHENG Yangfan; JIANG Bayun; SHEN Zhaowu; GAN Xiaohong

doi:10.11883/bzycj-2023-0465

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ZHANG Beibei, CHENG Yangfan, JIANG Bayun, SHEN Zhaowu, GAN Xiaohong. Influence of typical metal powders on the shock wave effect and thermal damage performance of FAE[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0465

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ZHANG Beibei, CHENG Yangfan, JIANG Bayun, SHEN Zhaowu, GAN Xiaohong. Influence of typical metal powders on the shock wave effect and thermal damage performance of FAE[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0465

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Influence of typical metal powders on the shock wave effect and thermal damage performance of FAE

doi: 10.11883/bzycj-2023-0465

1.
School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China
2.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China
3.
Huainan Wanhuai Electromechanical Co., Ltd., Huainan 232001, Anhui, China

Received Date: 2023-12-26
Rev Recd Date: 2024-02-28

Available Online: 2024-03-11

Abstract

Abstract

To investigate the influence of typical metal powders on the shock wave effect and thermal damage performance of fuel air explosive (FAE), the explosion characteristics, flame structure and temperature distribution characteristics of epoxypropane (PO) with different types and contents of metal powders were experimentally studied using a 20 L spherical liquid explosion test system. The temperature field of explosion flame was reconstructed by the colorimetric temperature measurement method with a high-speed camera, which is based on the gray-body radiation theory and a self-written python code. The tungsten lamp was used to calibrate the measuring accuracy of the temperature mapping system, and the fitting relationship between the temperatures and the gray values of the high-speed images is derived to obtain the conversion coefficient. The experimental results show that the optimal mass concentration of pure PO was 780 g/m³, both the explosion overpressure (∆p_max) and the explosion pressure rise rate ((dp/dt)_max) reached the maximum, ∆p_max=0.799 MPa and (dp/dt)_max=52.438 MPa/s, respectively. The maximum explosion overpressure, maximum explosion pressure rise rate and maximum average temperature of PO added with Al, Ti and Mg powders all increase with the increase of mass ratios (I), while the trend of maximum pressure rise time is opposite. The variation rules of the maximum explosion overpressure and maximum average temperature are consistent, the order of their values is: Al/PO, Mg/PO, Ti/PO. When I=40%, the maximum explosion overpressure value of the three solid-liquid mixed fuels increases by 12.00%, 8.41% and 11.54%, respectively, compared with pure PO. In addition, the variation rules of the maximum explosion pressure rise rate and the combustion rate are consistent, the order of their values is: Al/PO, Mg/PO, Ti/PO. When I=40%, the maximum explosion pressure rise rate value of the three solid-liquid mixed fuels increases by 41.91%, 39.60% and 45.29%, respectively, compared with the pure PO. The results indicate that different high-energy metal powders have varied advantages in improving the explosion performance of PO, so metal powders should be appropriately selected as energetic additives according to the damage performance index in the formulation design of FAE.
- fuel air explosive,
- epoxypropane,
- metal powders,
- solid-liquid mixed fuels,
- damage performance,
- colorimetric temperature measurement

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