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近年来,气溶胶作为一种无源干扰手段,以其较好经济性和较高的实用性得到了各国军方的重视并在现代高科技下的局部战争中得到广泛应用。基于牛顿第二定律建立了气溶胶粒子的运动方程,采用有限差分方法对粒子运动方程和气溶胶平流扩散方程进行差分运算,构建了重力作用下的气溶胶“沉降—扩散”联合动态模型,基于模型提出了气溶胶“沉降—扩散”联合动态数值模拟方法。以某自主开发的气溶胶材料为实验样品,模拟烟幕箱中气溶胶的“沉降—扩散”联合动态运动,研究气溶胶浓度的时域分布,并与烟幕箱采样实验结果进行比较。实验结果表明:气溶胶“沉降—扩散”联合动态模型能够较好地模拟气溶胶的动态特征,对研究气溶胶材料和发烟器性能、开展气溶胶干扰动态仿真实验、评估气溶胶干扰效能等具有重要意义。
In recent years, as a passive interference means, aerosol has gained the attention of the military of all countries for its good economy and high practicability, and has been widely used in the local war under the modern high technology. Based on Newton ’s second law, the equations of motion of aerosol particles were established. By using the finite difference method, the particle motion equation and aerosol advection - diffusion equation were differentiated. The aerosol “sedimentation - diffusion Based on the model, the aerosol ”sedimentation - diffusion “ combined dynamic numerical simulation method is proposed. A self-developed aerosol material was used as the experimental sample to simulate the ”sedimentation-diffusion“ combined aerodynamic motion of aerosol in the smoke box. The time domain distribution of the aerosol concentration was studied and compared with the experimental results of the smoke box sampling. The experimental results show that the aerosol ”sedimentation-diffusion " combined dynamic model can better simulate the dynamic characteristics of aerosols, the aerosol material and the performance of the smoke, aerosol interference dynamic simulation experiments to assess aerosol interference Effectiveness is of great significance.