Weibull统计特性风速条件下的自然通风实验

采用双参数Weibull统计模型对室外逐秒风速进行了拟合,结合频谱特性分析对实测自然风的典型性进行验证,并考虑到风向对通风效果的影响定义了风向因子参数。通过实际自然风条件下模型比例为1∶10的通风实验,对尺寸因子、形状因子及风向因子等自然风特性参数对自然通风效果的影响进行了研究,并建立了相应的影响模型。研究结果表明:逐秒自然风风速统计分布服从双参数Weibull统计模型;实际自然风条件下,通风效果随Weibull分布的尺寸因子及风向因子的增加而加强,随形状因子的增加而减弱。

Natural ventilation experiment under Weibull distribution characteristics wind speed condition

Two-parameter Weibull distribution model was used to fit the outdoor wind speed by second.The typicality of the wind data measured was verified according to the spectrum analysis result.And the wind direction factors were defined,according to the influence of natural wind direction on the ventilation.The influence of the parameters,including size factor,shape factor and wind direction factor,on natural ventilation was studied by experiment with 1：10 model geometry scale.And the influence model was set up.The result shows that：the outdoor wind speed by second was subjected to the two-parameter Weibull distribution model;the natural ventilation effect was strengthened with size factor and wind direction factor increasing and weakened with shape factor decreasing.