流体与固体表面之间的换热能力,比如说,物体表面与附近空气温差1℃,单位时间(1s)单位面积上通过对流与附近空气交换的热量。单位为W/(m^2·℃)或J/(m^2·s·℃)。表面对流换热系数的数值与换热过程中流体的物理性质、换热表面的形状、部位以及流体的流速等都有密切关系。物体表面附近的流体的流速愈大,其表面对流换热系数也愈大。如人处在风速较大的环境中,由于皮肤表面的对流换热系数较大,其散热(或吸热)量也较大。对流换热系数可用经验公式计算,通常用巴兹公式计算。
... convection superheater 对流过热器 convection transfer rate 对流换热系数 convection tubes 对流管束 ...
基于8个网页-相关网页
The heat transfer coefficient of the hot side is determined with the theoretics of transient heat conduction in the semi-infinite slab and the instantaneous temperature measured by the infrared thermography.
壁面的对流换热系数是根据半无限大物体瞬态导热的理论和热像仪测得的壁面瞬态温度场确定的。
参考来源 - 致密微孔壁复合冷却数值模拟与实验研究·2,447,543篇论文数据,部分数据来源于NoteExpress
对流换热系数随着颗粒直径的增大而增大。
The coefficient of convection heat transfer increases with increasing the particle diameters.
升力体模型对流换热系数测量不确定度大致为15%左右。
The uncertainty in measured convective heat-transfer coefficient on lifting body model was about 15%.
当对流换热系数足够大时,再改变对流换热系数对温度影响较小。
If the convective heat transfer coefficient is great enough, its rechange has smaller effect on temperature response.
应用推荐