爆炸防雹中可能动力机制的探讨
THE POSSIPLE DYNAMIC MECHANISM OF EXPLOSION IN HAIL SUPPRESSION
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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。Abstract: 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.
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许焕斌,王思微.关于爆炸防雹中的若干问题.见:石安英等编.防雹和雹云物理文集.北京:气象出版社,1989.214~236 李连银,用雷达回波参量变化分析高炮人工防雹效果.气象,1996,22(9):26~30 Бибилашвили Н Ш и Т Д. Исследование Эффективности Разрушения Конвективных Овлаков Взрывом и Продуктами Ликвидации Противоградовых Снарядов ВГИ Труды 47, 1981,36-44
黄美元等.关于我国人工防雹效果的统计分析.大气科学,1978,2(1):124~130 黄美元,王昂生等.人工防雹导论.北京:科学出版社,1980,500PP Воронов Г С и Т Д. Исследованияиискусственные Воздействия на Градовые Процессы, Труды Ⅷ, Всесоюзной Конференции по Физки Овлаков и активным Воздействиям,1970,379-390
Аьшаев М Т и Т Д. Результаты Противоградовых Раьот на Северном Кавказе в 1972 г ВГИ Труды 25, 1974, 52-58
许焕斌.关于爆炸影响气流的力学原理.气象,1979,5(10):26~29 许焕斌,王思微.关于声振动对球形降水粒子运动边界层和运动状态的影响.气象学报,1984,42(4):431~439 王思微,许焕斌.不同流型雹云中大雹增长运行轨迹的数值拟.气象科学研究院院刊,1989,4(2):171~177 许焕斌,王思微.关于爆炸防雹方法的理论依据和技术要领的探讨.气象科学研究院院刊,1989,4(3):311~318 鲍姆等.爆炸物理学.北京:科学出版社,1964,198~541 朗道等.流体力学(下册).北京:高教出版社,1990,100~101 温景嵩.概率论与微大气物理学.北京:气象出版社,1995,98~100 胡非.湍流间歇性与大气边界层.北京:科学出版社,1995,17 伍荣生.大气动力学.北京:气象出版社,1990,276~285 速极 高守亭,陶诗言,丁一汇.表征波与流相互作用的广义E-P通量.中国科学B辑,1989,7,774~778 高守亭,李军,洪钟祥.重力波破碎对中层大气环流影响的研究.见:地球环境和气候变化探测与过程研究.北京:气象出版社,1997,57~63 Iwasaki T,Yamada S, Tada K.A parameterization scheme oforographic gravity wave drag with two different vertical pratitioninigs, Part I.JMS Japan, 1989,67(7):11-27
许焕斌,王思微.三维可压缩大气中的云尺度模式.气象学报,1990,48(1):80~90 段英,刘静波.单体多单体和超级单体雹云中大雹形成的数值摸拟.气象学报,1998,56(5):529~539
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