爆炸防雹中可能动力机制的探讨

THE POSSIPLE DYNAMIC MECHANISM OF EXPLOSION IN HAIL SUPPRESSION

中文关键词:  爆炸影响气流  爆炸防雹动力理论  数值模拟

英文关键词:Effect of explosion on airfolow dynamic  Theory of explosion for hailsupperssion  Numerical simulation

中文摘要:

      文中在进一步归纳观测现象和分析爆炸产物能力的基础上,提出了爆炸扰动气流和重力波破碎可以对气流产生显著影响的物理假说,并应用数值模式模拟了扰动气流对基本流的作用,得到的结果与物理假说所预期的相一致;也与过去的实验或试验结果相一致。这说明爆炸(瞬时)产生扰动场,扰动场(维持一段时间)再与基本场相互作用来影响基本流(更长维持时间),看来这可能是爆炸影响基本流的主导途径。

英文摘要:

      The observable phenomena is induced in explosion in cloud and the ability of explosion products are analysised.In view of the above a theoretic deduction suggested.It is that the strong disturbance airflow induced by explosions,gravity wave break down(the gravity wave can be caused by explosions too and its breakdown occurs when it propagates into cloud),both of them can obviously influence the mean airflow of cloud.The effects of strong distur bance airflow on the mean airflow are simulated by numerical model.The results of simulation are consistence with the theoretic deduction and the previous reports of tests or experiments.It is verified that the theoretic deduction is realizable,i.e.the explosion(instantaneous)causes the strong disturbance for air motion(in some time interval),the interaction bet ween the disturbance and the background airflow field can obviously influence the background air flow(during some longer time),this may be the main way of explosion to effectthe airflow.It indicated also the scientific condition to plan and prepare the special test or the field experimentis possessed.