Thermal protection systems and methods for vehicles moving through a free stream of air

Abstract

A thermal protection system is provided for a vehicle moving with velocity through a free stream of air. The system comprises a substrate layer having coolant feed holes through which coolant can pass, and an insulation layer bonded to the substrate layer and covering the coolant feed holes of the substrate layer. The system also comprises a honeycomb layer including (i) a first major surface bonded to the insulation layer, (ii) a second major surface opposite the first major surface and exposed to the free stream of air, and (iii) a cell structure that shifts a thermal boundary interface from between the insulation layer and the first major surface of the honeycomb layer to the second major surface of the honeycomb layer. Surface cooling of the insulation layer and the substrate layer is provided by coolant passing through the coolant feed holes of the substrate layer into the insulation layer as the vehicle moves with velocity through the free stream of air.