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| Investigation on blast mitigation mechanism by water mist |
| Received:August 22, 2023 Revised:October 20, 2023 |
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| DOI：10.7511/jslx20230822002 |
| KeyWord:water mist blast wave blast mitigation Euler-Lagrange method dissipation of energy |
| Author | Institution |
| 赵家兴 |
南京理工大学 机械工程学院, 南京 |
| 刘凇含 |
南京理工大学 机械工程学院, 南京 |
| 姜林 |
南京理工大学 机械工程学院, 南京 |
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| Abstract: |
| This study aims to investigate the attenuation mechanism of water mist on blast waves and the dissipation process of energy and momentum in the water mist.To achieve this goal,a three-dimensional numerical simulation of the interaction between water mist and a blast wave is carried out based on Euler-Lagrange method.The propagation characteristics of the blast wave in the water mist,as well as the heat transfer,mass transfer,and momentum transfer between droplets and the energy released by the explosion,were analyzed.The established numerical model takes into account the mass,momentum,and energy transfer between the gas phase and the droplet phase,as well as droplet atomization,and for the first time considers the size distribution of the droplets.The research results demonstrate that water mist can effectively block the heat released by explosions.When the blast waves pass through the air-water mist interface,both reflection and transmission phenomena occur.The water mist absorbs energy through processes such as momentum extraction,evaporation,and convective heat transfer by droplets,resulting in the weakening of the blast waves.The air-water mist interface is the location with the highest efficiency of momentum and energy transfers between blast waves and water mist.Due to the attenuation of blast waves,the velocity and temperature of the airflow behind the shock front gradually decrease,leading to a gradual reduction in the efficiency of momentum and energy transfers between the blast waves and water mist. |
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