PARTICLE INFRARED (IR) OPTICAL PROPERTY MEASUREMENT TECH NIQUE DEFINITION AND DESIGN

THE FUNDAMENTAL OPTICAL PROPERTIES OF SEVERAL PURE AND CONTAMINATED PARTICULATE SPECIES AT HIGH TEMPERATURES ARE CITICAL INGREDIENTS IN THE NUMBERICAL PREDICTION OF THE RADIATIVE SIGNATURES OF ROCKET EXHAUST PLUMES. PSI PROPSES TO INVESTIGATE EXPERIMENTAL METHODS FOR MEASURING THE DESIRED OPTICAL PROPERTIES OVER THE WIDEST POSSIBLE RANGE OF WAVELENGTH, TEMPERATURE, AND PARTICLE SIZE, AND TO DESIGN A SERIES OF EXPERIMENTS TO ACHIEVE OPTIMAL RESULTS FOR USE IN PREDICTIVE CODES. ALTHOUGH SEVERAL POSSIBLE TECHNIQUES WILL BE EVALUATED, ONE OF THE MORE ATTRACTIVE POSSIBILITIES INVOLVES THE USE OF A SHOCK TUBE COUPLED WITH A VARIETY OF EXTINCTION, EMISSION, AND SCATTERING DIAGNOSTICS, INCLUDING RAPID-SCANNING MONOCHROMATORS AND DIODE ARRAY DEVICES.