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Reacting gas-surface interaction and heat transfer characteristics for high-enthalpy and hypersonic dissociated carbon dioxide flow
- Source :
- International Journal of Heat and Mass Transfer. 146:118869
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Hypersonic carbon dioxide reacting gas-surface interaction occurs on the heat shield of high-speed Mars entry capsules, which has great influences on the heat transfer characteristics. Based on hypersonic reacting flow solver with complex surface thermochemistry, the hypersonic chemical non-equilibrium flow with oxygen/carbon gas mixture was numerically simulated, and the interaction between non-equilibrium flow and surface reactions was numerically analyzed to reveal the mechanism of aerodynamic heating from surface thermochemistry. Numerical results of catalytic effects show that the near-wall thermochemical behaviors are essentially dominated by the near-wall diffusion and chemical reactions. Various surface reactions alter the flow structure in the boundary layer, and generate different aerodynamic heating patterns. Results from ablating simulations indicate that the ablating surface can induce additional near-wall diffusion and injection energy though their influence on the thermal boundary layer structure is neglectably small. The modeling of reacting gas-surface interaction can be of benefit to promoting the fidelity and precision of aerodynamic heating with complex surface thermochemistry.
- Subjects :
- Fluid Flow and Transfer Processes
Hypersonic speed
Materials science
Mechanical Engineering
Diffusion
Aerodynamic heating
Thermodynamics
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Chemical reaction
010305 fluids & plasmas
Boundary layer
0103 physical sciences
Heat transfer
Heat shield
Thermochemistry
0210 nano-technology
Subjects
Details
- ISSN :
- 00179310
- Volume :
- 146
- Database :
- OpenAIRE
- Journal :
- International Journal of Heat and Mass Transfer
- Accession number :
- edsair.doi...........54c439cc24b93314afda46b5e73ee82b