Simulation of the interaction between partially-ionized air and the catalytic surface of high-temperature reusable thermal insulation

Experimental and Theoretical Simulation of Heterogeneous Catalysis in Aerothermochemistry (a Review)

“…At high T w the model [69] gives significantly greater values of k wO (T w ) than the experiment. The model [73][74][75] is in good agreement with the experimental data. At high T w models [67,71] predict similar values of k wO (T w ).…”

“…At high T w models [67,71] predict similar values of k wO (T w ). They occupy an intermediate position between the values obtained by means of models [69,74]. The results are similar for k wN .…”

“…The model [69] gives overestimated values of the heat fluxes on the surface interval 0.1 < x/L < 0.6. The model [73][74][75], in which the rate coefficients of the elementary stages are determined from the data of [76], is in good agreement with the flight data. The models [67,71] give intermediate results.…”

“…Calculated coefficient of catalytic activity k wO of a heat shield tile. The points correspond to experiment [19], curves 1-3 to [69] with account for both recombination mechanisms (curve 1), the shock mechanism (curve 2), and the associative mechanism (curve 3); and curves 4-6 to model [67,71,74] In aerothermochemistry problems, the parameters of the catalysis models are determined by fitting the calculated values of the heat fluxes to those measured experimentally. The values of the parameters of the catalysis model significantly depend on the chosen mechanism of heterogeneous recombination.…”

“…For example, in [72] it was shown that for the "Space Shuttle" vehicle models [64,66], which take into account both recombination mechanisms with different values of the parameters, predict the same heat flux level. The model [73][74][75] based only on the shock recombination mechanism likewise gives the same heat flux level. This also applies to the "OREX" vehicle (see Fig.…”