【名词&注释】
对流传热系数(convective heat transfer coefficient)、总传热系数(overall heat transfer coefficient)、饱和水蒸汽(saturated steam)、传热系数K(heat transfer coefficient k)、接近于(close to)、水蒸汽加热(heated with water steam)
[填空题]在传热实验中用饱和水蒸汽加热(heated with water steam)空气,总传热系数K接近于(close to)()侧的对流传热系数,而壁温接近于(close to)()侧流体的温度值。