Numerical simulation of protective structures for gas testing in explosive environments
The modern weapons testing process often involves a hazardous explosive environment,and the difficulty and low accu-racy of gas testing at the blast field,so protective structures are usually used to attenuate the effects of blast shock waves.In order to further investigate the effectiveness of protective structures on shock wave testing,numerical simulations using the 2D-Euler algorithm are performed to calculate and analyze the blast shock waves under different protective structure conditions.The effect of these param-eters on the effectiveness of the protective structure and shock wave testing is investigated by varying the size and number of openings in the protective structure and the thickness of the baffle.The results show that:the simulation of the optimal protective structure gas diffusion area of 81.73％of the empty explosion environment,the over pressure value reduced by 61.27％,the peak over pressure at the sensor surface is 698.5kPa,compared with the set sensor can withstand the threshold value reduced by 30.15％,than the single-factor simulation of the optimal protective structure of the peak over pressure 8.74％,7.14％and 6.68％,respectively,to achieve the research purpose.
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