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建筑物群中多上行先导三维模型的建立

余骏皓 谭涌波 郑天雪 王艺儒 师正

余骏皓, 谭涌波, 郑天雪, 等. 建筑物群中多上行先导三维模型的建立. 应用气象学报, 2020, 31(6): 740-748. DOI: 10.11898/1001-7313.20200609.
引用本文: 余骏皓, 谭涌波, 郑天雪, 等. 建筑物群中多上行先导三维模型的建立. 应用气象学报, 2020, 31(6): 740-748. DOI: 10.11898/1001-7313.20200609.
Yu Junhao, Tan Yongbo, Zheng Tianxue, et al. A three-dimensional model establishment of multiple connecting leaders initiated from tall structures. J Appl Meteor Sci, 2020, 31(6): 740-748. DOI:  10.11898/1001-7313.20200609
Citation: Yu Junhao, Tan Yongbo, Zheng Tianxue, et al. A three-dimensional model establishment of multiple connecting leaders initiated from tall structures. J Appl Meteor Sci, 2020, 31(6): 740-748. DOI:  10.11898/1001-7313.20200609

建筑物群中多上行先导三维模型的建立

DOI: 10.11898/1001-7313.20200609
资助项目: 

国家重点研究发展计划 2017YFC1501504

国家自然科学基金项目 AAA

灾害天气国家重点实验室开放课题 2019LASW-A03

详细信息
    通信作者:

    谭涌波, ybtan@ustc.edu

A Three-dimensional Model Establishment of Multiple Connecting Leaders Initiated from Tall Structures

  • 摘要: 为实现对地闪过程中多上行先导现象的模拟,在已有三维随机放电参数化方案基础上,植入多先导始发与发展模块以建立高建筑群多上行先导模型,利用电场并行计算技术提高模拟效率。将新模型应用于实际地闪模拟并就统计数据与先导形态特征同观测数据进行对比。结果表明:上行未连接先导长度为12~709 m,起始高度为360~600 m,距连接点水平距离为255~1026 m,距下行先导最近分支的距离为326~589 m,与观测统计结果具有较高的一致性;形态上再现了实际地闪个例F1215中上行未连接先导始发时间早,通道笔直的特点,也能够模拟下行先导与单上行先导头部、单上行先导侧面、多上行先导中连接先导头部、多上行先导中连接先导侧面4种已有观测记录的连接情况,为后续研究提供基础模型。分析模拟结果初步得出结论:最高的广州塔能够对附近一定范围建筑起保护作用且能吸引较远处的下行先导分支;多先导的始发与最后一跳的连接受地面高建筑物群分布、高度以及下行先导位置综合影响。
  • 图  1  一次地闪过程的模拟

    Fig. 1  Simulation of cloud-to-ground lightning

    图  2  建筑物群模型

    Fig. 2  Model of simulated buildings

    图  3  模拟F1215闪电通道

    Fig. 3  Simulation of F1215 lightning channel

    图  4  高建筑物群中上行先导连接情况的模拟 (a)始发单连接先导, “头部-头部”连接方式,(b)始发单连接先导, “头部-侧面”连接方式,(c)始发多连接先导, “头部-头部”连接方式,(d)始发多连接先导, “头部-侧面”连接方式

    Fig. 4  Simulation of upward leaders in high building groups (a)the single connecting leader, the "tip-tip" connecting mode, (b)the single connecting leader, the "tip-side" connecting mode, (c)the multiple connecting leaders, the "tip-tip" connecting mode, (d)the multiple connecting leaders, the "tip-side" connecting mode

    图  5  地闪模拟中先导参数统计

    Fig. 5  Parameter statistics of upward leaders in cloud-to-ground lightning simulation

    表  1  观测数据与模式结果对比

    Table  1  Comparison of observations and model output

    对比数据 UUL起始高度/m UUL长度/m 距连接点水平距离/m 距下行先导最近分支距离/m
    二维观测数据 40~503 0.48~399 20~1300 99~578
    三维观测数据 0.53~678.3 22~2210 108.9~982.6
    三维模式结果 360~600 12~709 255~1026 326~589
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-05-12
  • 修回日期:  2020-07-06
  • 刊出日期:  2020-10-27

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