RELEVANCE AND TECHNOLOGICAL IMPACT: IN VALIDATING COMPUTATIONAL MODELS AGAINST GROUND TEST DATA RECENT STUDIES HAVE IDENTIFIED SEVERAL ANOMALIES PARTICULARLY IN CO2: SHOCK STAND-OFF DISTANCES VARIED BY A FACTOR OF TWO AND CONCLUSIONS AS TO WHETHER A NONCATALYTIC OR SUPER-CATALYTIC WALL MODEL MATCHED THE LAMINAR HEAT TRANSFER DIFFERED. A KEY EXPERIMENTAL ISSUE IS EXAMINING THE FACILITY DEPENDENCE OF THE DATA. WITH THE MOVE OF THE HYPERVELOCITY EXPANSION TUBE (HET) FACILITY FROM THE UNIVERSITY OF ILLINOIS TO CALTECH WE NOW HAVE UNIQUE ACCESS TO TWO HYPERVELOCITY FACILITIES WITH DIFFERENT MEANS OF GAS ACCELERATION. WE PROPOSE EXPERIMENTS IN BOTH FACILITIES AS DESCRIBED BELOW THAT WILL FORM THE BASIS OF A PHD THESIS FOR A STUDENT MATTHEW LEIBOWITZ WHO IS SUPPORTED BY A NASA SPACE TECHNOLOGY RESEARCH FELLOWSHIP. OBJECTIVES OF THE PROPOSED RESEARCH: WE PROPOSE TO:>INCREASE THE DATABASE OF HEAT FLUX AND SHOCK SHAPE MEASUREMENTS IN CO2 IN THE HET>INVESTIGATE MAKING SPECTRAL MEASUREMENTS IN THE HET TO PROVIDE DATA FOR THERMOCHEMICAL MODEL DEVELOPMENT IN CO AND CO2.>EXAMINE NOZZLE FLOWS AT DIFFERENT AREA RATIOS IN THE T5 REFLECTED SHOCK TUNNEL FACILITY TO PROVIDE DATA FOR ASSESSING NONEQUILIBRIUM EFFECTS. TECHNICAL APPROACH: OUR UNIQUE ACCESS TO TWO HIGH-ENTHALPY FACILITIES PROVIDES THE FLEXIBILITY TO ACCESS A RANGE OF TEST GAS CONDITIONS WITH AN UNDISSOCIATED FREESTREAM (HET) ACHIEVE LONGER TEST TIMES AND SPAN LAMINAR AND TURBULENT CONDITIONS (T5) AND EXAMINE THE FACILITY INDEPENDENCE OF OUR RESULTS.SCIENTIFIC MERIT: THE PROPOSED RESEARCH AIMS TO PROVIDE AN EXTENSIVE HIGH-QUALITY DATABASE FOR HIGH ENTHALPY CO2 CONDITIONS INCLUDING: I) SURFACE HEAT TRANSFER MEASUREMENTS AND II) SHOCK SHAPE QUANTIFICATION AND III) SPECIES AND TEMPERATURE SPECTRAL MEASUREMENTS.