Based on the rocket engine regenerative cooling application,the flow and heat transfer of supercritical-pressure methane in a square cooling channel with asymmetric heating on the top,bottom,and side outer-walls have been numerically investigated.The characteristic and mechanism of heat trans-fer under these three heated modes are studied.The effect of operating pressure on heat transfer is dis-cussed.The prediction correlation for average heat transfer in the channel circumferential direction is proposed.The results show that the pseudo-film boiling leads to the heat transfer deterioration.There are the largest secondary flow velocity and intensity in the side heated mode compared with other two heated conditions.Increasing the operating pressure helps the greater proportion of heat flux to be ab-sorbed by the heated inner-wall,and less heat flux is transmitted to other inner-walls.
supercritical-pressuremethaneheat transfer deteriorationbuoyancy effectsecondary flow intensity
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