Abstract
This paper investigated turbulent suppression caused by the thermal stratification in horizontal pipe.The present study finds that when the pipe flow becomes stratified,the mixing in vertical direction is suppressed and pressure drop decrease.Therefore,we investigated the tendency to decrease the pressure loss of pipe flow by changing the flow rate of upper-hot flow in a pipe.Experiments were performed using the differential pressure meter to measure the pressure drop.The experimental results show that the reduction of pressure drop is more remarkable in the stratified condition that velocity difference between upper and lower flow is high.
