EFFECTS OF LAMINAR LEADING EDGE TO THE TRANSIENT TURBULENT BOUNDARY LAYER HEAT TRANSFER WITH APPRECIABLE WALL CAPACITY.

An analytical model is presented to predict the transient mean heat transfer coefficient from a steady incompressible flow over a flat plate with finite length and thickness. The transort mechanism from both laminar and fully-turbulent flow regions are taken into account; the thermal capacitance and the resistance of the plate are also included. The integral method and finite difference technique are utilized to obtain the local heat transfer coefficient in the laminar-leading edge while the surface renewal and penetration concept is adapted in the fully turbulent region. With a proper choice of the critical Reynolds number, the numerical results for both flow regions are combined by piecewise integration to yield the average heat transfer coefficient over the entire plate.