| OCR Text |
Show 200 be determined not regions were in definitely, but it the induction the boundaries of the surface means and contracting. that a From the zone and occurred 0.9 to 0.2 external the of 0.15 seconds darkening, cylindrical and small enough have been observed. Edge a the light passed in diameter that circle about 0.35 effects by inter burning occurred burning rate, the to only in detector, those events diameter, could associated with the jet boundary and the ambient, cooler, gases this the period, the noted sweeps all at induction on was followed lightening through which portion, by it The seconds, and depended within the central gas alternately expanding wave to This wave. combustion zone. lighter flux. The view port, was but the surface rapidly, 0.05 frequencies, slowly, i.e. the the reactive interfacial facial more are light transmission record, rapid lighting. Presumably rates regions darkening period (induction phase) occurred, a away cycle while by the combustion over the darker that suspected the of phase regions had been recently swept was are propellant thus avoided design. Figure F-20 shows the combustion wavelet frequency data from tests in whic4 samples of translucent propellant, UBR, repeatedly surface can a range of flux perturbation combustion fronts obstruct frequencies One over over a from the light two-fold range of heat conclude that the frequency was rates. flux not heated was Note that the furnace at perturbation system coupled, regular rates. at least |
