INSULATIVE PERFORMANCE OF SELECTED ABLATIVE MATERIALS IN A LOW ENTHALPY HYPERSONIC AIRSTREAM
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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Tests were conducted to investigate the insulative performance of selected ablative materials when exposed to a relatively low enthalpy hypersonic airstream. Samples of cork, an elastomeric shield material, phenolic glass containing a buton resin, and phenolic glass, mounted on the surface of a sharp flat plate, were injected into a Mach 10 airstream at 15- and 25-deg angles of attack. The model was tested at a high free-stream Reynolds number, 2,200,000 per foot, to produce turbulent flow over the samples. The test results, which consisted of back surface temperature histories on the 0.15-in. -thick samples, showed that cork provided the greatest heat protection.
- Wood, Paper and Related Forestry Products