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山地露天矿自然通风风流与湍流结构的数值模拟
引用本文:王卫国,胡泳涛.山地露天矿自然通风风流与湍流结构的数值模拟[J].高原气象,1996,15(4):464-471.
作者姓名:王卫国  胡泳涛
作者单位:南京大学大气科学系
摘    要:利用建立的三维非力能量闭合的大气边界层数值模式,研究了中性层结条件下某露天矿自然通风的风流和湍流结构特征及影响因子。研究表明:坑内水平风场在坑底或采壁处受地形的影响很大,在矿采深与开口宽度比较小或者来流风速随高度的切变不大时,坑内气流为平直型,有利于通风;反之坑内则形成环流,且在环流范围内较大的湍能,不利于通风,易产生高浓度的污染物。本模式模拟的结果还与风洞模拟和高阶闭合模式模拟的结果作了检验比较

关 键 词:露天矿  自然通风  风流  湍流结构  数值模拟

NUMERICAL SIMULATION OF WIND AND TURBULENCE STRUCTURE IN NATURAL VENTILATION IN OPEN MINE
WANG Weiguo,LIU Hongnian,JIANG Weimei,HU Yongtao.NUMERICAL SIMULATION OF WIND AND TURBULENCE STRUCTURE IN NATURAL VENTILATION IN OPEN MINE[J].Plateau Meteorology,1996,15(4):464-471.
Authors:WANG Weiguo  LIU Hongnian  JIANG Weimei  HU Yongtao
Institution:WANG Weiguo 1 LIU Hongnian 1 JIANG Weimei 1 HU Yongtao 2
Abstract:A three-dimensional,nonhydrostatic atmospheric boundary layer numerical model,in which simple energy closure scheme was used,has been developed Under the condition of netural stability the special wind and turbulence fields in natural ventilation at a open iron mine in Hubei were simulated by using this numerical model Their characteristics and impact factors were studied The results indicated that,when the ratio of mine depth to mine width was small or the inflow shear was lower,a straight-pattern of the airflow was found in pit,this was favourable for the ventilation On the contrary,the circulation area in pit appeared easily and high value of TKE was found in the circulation area Under this condition,natural ventilation in pit was difficult and the high value of the pollutant concentration may be found Horizontal wind field was obvisouly affected by terrain near the bottom of pit or on the pit wall Some results obtainted from this model were agreement with these from wind tunnel simulation or high-order closure model
Keywords:Nonhydrostatic boundary layer model  Numerical simulation  Natural ventilation in open mine  Turbulence structure
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