Active Cooling for Reentry Vehicles

Period of Performance: 11/01/1987 - 03/01/1990

$401K

Phase 2 SBIR

Recipient Firm

Applied Technology Assoc., Inc.
411 NW 97th LANE
Coral Springs, FL 33071
Principal Investigator

Abstract

TRANSPIRATION COOLED NOSE TIPS (TCNT) ARE AN ATTRACTIVE MEANS FOR PROVIDING ACTIVE COOLING TO RE-ENTRY VEHICLES. THEY HAVE THE ABILITY TO MAINTAIN A STABLE RE-ENTRY VEHICLE SHAPE IN A HARSH THERMAL AND ERROSIVE ENVIRONMENT. THE ABILITY TO ACCURATELY PREDICT TCNT PERFORMANCE IS NOT AT A SUFFICIENT LEVEL TO PERMIT HIGH CONFIDENCE LEVEL PREDICITIONS IN THE NOSE REGION AND IN THE DOWN STREAM COOLING REGION TO BE PERFORMED. THE OBJECTIVE OF THE PROPOSED PHASE II WORK IS TO DEVELOP A MULTI-LAYER THEORETICAL MODEL THAT CONSISTS OF A LIQUID LAYER, A VISCOUS TWO SPECIE BOUNDARY LAYER AND AN INVISCID LAYER. SUBSCALE WIND TUNNEL TESTING WILL BE PERFORMED TO VALIDATE THE RESULTING MODEL. THE MODEL WILL THEN BE EXERCISED TO DETERMINE PERFORMANCE AT GROUND TEST CONDITIONS AND FLIGHT TEST CONDITIONS.