The experimental investigation on liguid cooling mechanism was carried out with water through an even-heated adiabatic straight pipe.The flow pattern

the heat transfer coefficient along full-flow-path

and the correlation between them

have been studied.In order to imitate the actual working conditions of the cooling passage of turbine vane

the heat transfer flux

the coolant inlet parameters

and the pipe angle are changeable.Some empirical formulas for come-to-saturated point Z B and come-annular point Z N have been derived and several useful conclusions have been drawn for engineering application.