When the radial component of the vapourvelocity and the axial variation of the vapour temperature were neglected, the error of the sonic limit is within 10 per cent.
The model includes solid velocity, space grade of saturation with vapour density and space grade of porous pressure in concrete multiphase system.
考虑了混凝土多相系统中固体速度、饱和度乘蒸汽密度的空间梯度和孔隙压力空间梯度；
3
The Model AS-2 is designed to check velocity and direction of air flow continuously with a smoke tube (No. 301) which reacts with vapour in the air and generates white smoke.