Serial experiments were conducted to obtain the flow and heat transfer characteristics of boiling two-phase pipe flow under different diameters and side load.By analyzing the measured parameters such as pressure drop

Reynolds number

void fraction

heat flux and heat transfer coefficient in the test pipe

the effects of side load and pipe diameter on the characteristics of boiling two-phase flow were studied.The results show that the greater the side load

the higher the pressure drop

the heat dissipation

and the lower the flow rate

the void fraction and the heat flux.Dynamic load increases the heat transfer coefficient for single-phase water flow.However for boiling two-phase flow

with the increase in side load

the heat transfer coefficient decreases somewhat first

then increases and finally decreases again.Pipe diameter also has great influence on Reynolds number

pressure drop

void fraction and heat dissipation.The pipe with smaller diameter has a larger flow resistance

and good heat exchange ability.