Abstract: In order to study the flow and heat transfer laws and physical mechanisms of supercritical n-decane in pipelines under the influence of rolling maneuver during flight, numerical simulations were carried out to analyze and discuss the effects of rolling maneuver conditions such as flight speed and rolling radius on the velocity field and temperature field, as well as the relevant mechanisms. The results show that both the increase of rolling radius and the decrease of flight speed will reduce the heat transfer coefficient and increase the flow velocity. For the fact that the buoyancy coefficient Bo^* and the thermal acceleration coefficient Kv of the fluid under different working conditions are both less than the critical value, the heat transfer of the fluid is only affected by inertial forces. The fundamental reason is that under the action of centrifugal force and Coriolis force, the uneven distributions of fluid velocity lead to eddy currents in the inner wall of the pipeline, resulting in deterioration of heat transfer. The proposed research may provide a reference for the scramjet thermal management by the scheme of active regenerative cooling with supercritical n-decane.