Propellant Combustion Diagnostics via Multichannel Absorption Spectroscopy

Dark Zones of Solid Propellant Flames: Critical Assessment and Quantitative Modeling of Experimental Datasets With Analysis of Chemical Pathways and Sensitivities

“…In typical experiments, the strand is oriented vertically, but it is shown here rotated 90° clockwise to make the correlation to the temperature profile clear. [53,98]). Note, the mole fractions of H shown are added to the mole fractions of table 4, which total slightly greater than 1.0, and then renormalized; thus, the added mole fractions are actually slightly less than shown.…”

“…Ordered temperature sensitivities for the JA2 16 atm case of VKMT-JA2 (53, 98) at 9.33 ms, the time of the maximum in the predicted heat release profile, which is taken to be the DZ ignition delay time; computed T = 2741 K. Table 19. Modeled τ DZ for the JA2 16 atm case of VKMT-JA2 (53,98) when k i of the chosen reaction is multiplied by 2.0 or 0.5. The reader is reminded that the result with the nominal mechanism is 9.33 ms. Also note that the last reaction, R50, does not appear on the sensitivity lists; it was included as a control (see text).…”

“…Table 18. Ordered temperature sensitivities for the JA2 16 atm case of VKMT-JA2 (53,98) at 9.33 ms, the time of the maximum in the predicted heat release profile, which is taken to be the DZ ignition delay time; computed T = 2741 K. . Table 19.…”

“…Table 19. Modeled τ DZ for the JA2 16 atm case of VKMT-JA2 (53,98) when k i of the chosen reaction is multiplied by 2.0 or 0.5. The reader is reminded that the result with the nominal mechanism is 9.33 ms. Also note that the last reaction, R50, does not appear on the sensitivity lists; it was included as a control (see text Table 23.…”

“…Vanderhoff and coworkers performed several studies on XM39 (55,98,127). A compilation of mixture results from the three studies is given in table 1 of Vanderhoff et al (98); L DZ may be estimated from NO profiles in Teague et al (127), suggesting the possibility of combining results to form a dataset (note that YTLY06 apparently incorrectly interpreted the infrared probe height of 0.15 cm given by us in table 1 of Vanderhoff et al (98) as L DZ ). However, the C : O ratio of measured DZ species can be readily checked; note that H 2 and N 2 were not probed due to use of infrared absorption techniques, thus, they have to be estimated, which precludes checking H and N ratios.…”