EFFECTS OF CURVATURE RADII AND ASPECT RATIOS ON COOLING CHANNELS HEAT TRANSFER FOR LIQUID ROCKET ENGINES
Coolant flow heat transfer characteristics in curved rectangular cooling channels are numerically modeled
and studied. It is determined that the heat transfer coefficient varies differently on three surfaces of cooling channel. In this study, we demonstrated that the heat transfer enhances significantly on the outer surface of cooling channel while it was reduced on the inner surface as coolant enters the curved section. This process
reverses as coolant exits the curve section of cooling channel. The three variables that are incorporated in the
heat transfer coefficient correlations include dimensionless distance from entrance or exit of the curved
section, the normalized radius of curvature and cooling channel aspect ratio. Finally new correlations are
developed for developing and diminishing coolant flow heat transfer coefficient as the coolant flow enters
and leaves curved section of cooling channels.