Emittance measurements of RCG coated Shuttle tilesThe spectral and total normal emittance of the Reaction Cured Glass (RCG) coating used on Shuttle tiles has been measured for surface temperatures of 300 to 1905 K. These measurements were made on two virgin and two flown Shuttle tile samples. Room temperature directional emittance data were also obtained and used to determine the total hemispherical emittance of RCG as a function of temperature. The data obtained from this calculation indicate that the total hemispherical emittance decreases from a room temperature value of 0.83 to a value of 0.76 at 1905 K. The flown Shuttle tiles exhibited a change in the spectral distribution of emittance compared to that of the virgin tile, but no significant trends in the total emittance from a virgin to a flown tile could be established.
Document ID
19920046993
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bouslog, Stanley A. (Lockheed Engineering and Sciences Co. Houston, TX, United States)
Cunnington, George R., Jr. (Lockheed Research Laboratories Palo Alto, CA, United States)