초록 ▼

The invention provides a system for selective reduction of infrared signature of a vehicle subjected to aerodynamic heating. Liquid coolant under pressure vaporizes in porous sections of the skin of the vehicle to transpiration-cool the skin. Adjacent downstream solid skin sections are film-cooled b

The invention provides a system for selective reduction of infrared signature of a vehicle subjected to aerodynamic heating. Liquid coolant under pressure vaporizes in porous sections of the skin of the vehicle to transpiration-cool the skin. Adjacent downstream solid skin sections are film-cooled by the vapor introduced in the boundary layer. Coolant flow control is achieved by pressurizing the liquid coolant, by modulating flow control valves, and, optionally, by configuring the porous section to operate as a cavitating venturi, or combinations of these methods.

대표청구항 ▼

An apparatus for reducing the temperature of a surface subjected to heating comprising: a skin having porous wall sections and solid wall sections; said porous wall sections further comprise an inner high-pressure loss portion and an outer low-pressure loss portion; a means for storing a liquid cool

An apparatus for reducing the temperature of a surface subjected to heating comprising: a skin having porous wall sections and solid wall sections; said porous wall sections further comprise an inner high-pressure loss portion and an outer low-pressure loss portion; a means for storing a liquid coolant; a means for pressurizing the liquid coolant; and a manifold means for delivering the liquid coolant from the storage means to the porous wall sections whereby vaporization is induced in a pressure-temperature environment below the coolant vapor pressure line with liquid coolant passing through said inner portion being vaporized to make the latent heat of vaporization available for cooling said outer portion.