Construction of catalytic model on SiO2-based surface and application to real trajectory

Numerical Analysis of Rarefied Oxygen Flow around Catalytic Materials

“…In addition, the experimental results discussed in this study are those obtained for the test piece temperature of 300K. In such a temperature regime, the LH reaction is believed to be a rare event [1]. For this reason, the discussion will be made by eliminating the recombination reaction through the LH reaction in the present study.…”

“…A SiC-based material is one of the candidate materials for the reusable TPS in the future planetary mission. Based on the recent theoretical studies, in which the heating environments over the OREX entry vehicle are analyzed, 1) the recombination processes of the atomic species behind a shock wave are so slow that a lot of atomic species in the boundary layer can reach the TPS surface. As a result, a recombination reaction occurs at the TPS surface depending on a surface catalysis of the TPS material.…”

“…Recently, the catalytic efficiency value of the recombination reaction of atomic oxygen occurred at a SiC material surface; O + O → O 2 + 5.08eV (1) was experimentally investigated by Osawa et al 2) In the experiment, oxygen and argon gas mixture was flown into a quartz tube, and was then discharged by supplying a radio-frequency current to an induction coil. The emission intensity ratio of oxygen line to argon line around the test piece was measured during the testing.…”

Numerical Calculation of Rarefied Oxygen Flow for Surface Catalysis Evaluation

“…O + O → O 2 + 5.08eV (1) was experimentally investigated by Osawa et al [2]. In the experiment, oxygen and argon gas mixture was flown into a quartz tube, and was then discharged by supplying a radio-frequency current to an induction coil.…”

“…A silicon carbide (SiC)-based material is one of the candidate materials for the reusable TPS in the future planetary mission. Based on the recent theoretical studies, in which the heating environments over the OREX entry vehicle are analyzed [1], the recombination processes of the atomic species behind a shock wave are so slow that a lot of atomic species in the boundary layer can reach the TPS surface. As a result, a recombination reaction occurs at the TPS surface depending on a surface catalysis of the TPS material.…”