Accession Number : AD0921718

Title :   Preliminary Study of a Self-Regulating Transpiration System (SERTS) for Application to Reentry Vehicle Nose Tips.

Descriptive Note : Final rept. 15 Jun-14 Dec 73,


Personal Author(s) : Costello,Frederick A. ; McDonough,Thomas B. ; Snedeker,Richard S.

Report Date : MAR 1974

Pagination or Media Count : 87

Abstract : A Self-Regulating Transpiration System (SERTS) concept has been developed through the design of ground test and flight hardware by means of which the nose tip of a reentering missile might retain its sharp shape. The concept uses the thermal expansion of a liquid to open a valve through which a liquid coolant flows, admitting the coolant to a vaporization chamber. Aerodynamic heating of the nose tip causes the actuator temperature to rise, opening the valve and permitting the coolant to absorb the heat input. The vapor so generated is expelled into the boundary layer so the heat transfer to the nose tip will be diminished by blowing. A successful ground test has been made at A.R.A.P. (Author)

Descriptors :   (*Nose tips, Reentry vehicles), (*Cooling, Transpiration), Atmosphere entry, Slender bodies, Self operation, Aerodynamic configurations, Retention(General), Heat transfer, Thermal expansion, Liquid cooling, Coolants, Valves, Vapors, Boundary layer, Expulsion, Blowers, Aerodynamic heating, Shape, Stability

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Guided Missile Reentry Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE