爆炸环境气体测试防护结构的数值模拟

Numerical simulation of protective structures for gas testing in explosive environments

现代武器试验过程中常涉及到危险性较高的爆炸环境,而在爆炸场进行气体测试的难度大、准确性低,故通常采用防护结构来减弱爆炸冲击波的影响。为了进一步探究防护结构对冲击波测试的有效性,采用2D-Euler算法进行数值模拟,对不同防护结构条件下的爆炸冲击波进行计算和分析。通过改变防护结构的开孔大小、个数和挡板厚度来研究这些参数对防护结构的效果和冲击波测试的影响。结果表明:仿真最优防护结构气体扩散面积为空爆环境的81.73%,超压值降低了61.27%,于传感器面的超压峰值为698.5 kPa,较设定传感器所能承受的阈值小30.15%,比单因素仿真最优防护结构的超压峰值分别低8.74%、7.14%和6.68%,达到研究目的。

The modern weapons testing process often involves a hazardous explosive environment,and the difficulty and low accuracy 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 parameters 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.