Aerodynamic performance of new conceptual configuration of high speed vehicle's heat flux and drag reduction

A heat flux and drag reduction conceptual configuration combining the forward-facing cavity and the channel was proposed with high speed.The ength-to-depth ratio of forward-facing cavity was set as 1.The first series of channel height with 0,10,20,30,40 mm,and the second series of channel entrance height with 30 mm and channel exit height with 35,40,45,50 mm were taken into consideration.The wall heat flux distributions and drag coefficient were extracted from the flow field structures to evaluate the heat flux and drag reduction characteristics via solving Navier-Stokes （N-S） equations.The results showed that the cavity-channel configuration can achieve the expected heat flux and drag reduction.Compared with the baseline blunt cone,the cavity-channel configuration （the channel entrance height to exit height ratio of 30/50） had the optimal but not best heat flux and drag reduction performance within the range considered,and the heat flux and drag reduction rates reached approximately 40.1% and 16.8%,respectively.Higher channel height indicated better the drag reduction,but the heat flux protection effectiveness became weakened.Moreover,higher channel exit height with a constant channel entrance height could enhance the drag reduction effectiveness without any heat flux reduction penalty.