Thin-film boundary-layer diffusion of non-equilibrium flow to kinetically limited reactive surfaces via Damköhler thermochemistry tables
Fuente:
arXiv
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911163305951232 |
|---|---|
| author | Engerer, Jeffrey D. Collins, Lincoln N. |
| author_facet | Engerer, Jeffrey D. Collins, Lincoln N. |
| contents | Traditional ablation thermochemistry tables for atmospheric entry are derived from boundary-layer element diffusion assuming homogeneous and heterogeneous thermochemical equilibrium at the vehicle surface. Prior techniques for finite-rate surface reactions predominantly embed specific heterogeneous reaction models within the homogeneous equilibrium solution procedures and tables. This paper disseminates a boundary-layer integral solution for wall-gas free oxygen coupled to finite-rate surface kinetics. Solutions are pre-tabulated along normalized kinetics variables without direct integration into an equilibrium thermochemistry solver. This technique allows greater flexibility in presumed kinetics rates and wall-gas conditions in simple air-carbon systems, but the extensibility to state-of-the-art simulations and complex materials remains uncertain. A derivation and preliminary results are presented to the encourage further development. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_15427 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Thin-film boundary-layer diffusion of non-equilibrium flow to kinetically limited reactive surfaces via Damköhler thermochemistry tables Engerer, Jeffrey D. Collins, Lincoln N. Applied Physics Traditional ablation thermochemistry tables for atmospheric entry are derived from boundary-layer element diffusion assuming homogeneous and heterogeneous thermochemical equilibrium at the vehicle surface. Prior techniques for finite-rate surface reactions predominantly embed specific heterogeneous reaction models within the homogeneous equilibrium solution procedures and tables. This paper disseminates a boundary-layer integral solution for wall-gas free oxygen coupled to finite-rate surface kinetics. Solutions are pre-tabulated along normalized kinetics variables without direct integration into an equilibrium thermochemistry solver. This technique allows greater flexibility in presumed kinetics rates and wall-gas conditions in simple air-carbon systems, but the extensibility to state-of-the-art simulations and complex materials remains uncertain. A derivation and preliminary results are presented to the encourage further development. |
| title | Thin-film boundary-layer diffusion of non-equilibrium flow to kinetically limited reactive surfaces via Damköhler thermochemistry tables |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2509.15427 |