Theoretical approach and experimental verification of the role of diffusive transport under binary scaling conditions
| Autor: | Olivier Chazot, Richard G. Morgan, G. de Crombrugghe |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics 020301 aerospace & aeronautics Hypersonic speed Mechanical Engineering Binary scaling Binary number 02 engineering and technology Condensed Matter Physics Stagnation point 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Damköhler numbers 0203 mechanical engineering Flow (mathematics) 0103 physical sciences Statistical physics Diffusion (business) Wind tunnel |
| Zdroj: | International Journal of Heat and Mass Transfer. 97:675-682 |
| ISSN: | 0017-9310 |
| DOI: | 10.1016/j.ijheatmasstransfer.2016.02.018 |
| Popis: | The binary scaling law is commonly used to study the aerothermodynamics of hypersonic vehicles in ground-based facilities. Its application is usually restricted to situations where diffusive transport is neglected. However, as demonstrated in this paper, the diffusion processes are embedded in the Peclet and wall Damkohler numbers, which are conserved through the duplication of the binary scaling similitude parameters, namely the nature of the gas, the free-stream enthalpy h ∞ and the product of a density and a length-scale of the flow ρ L . The role of diffusion is first demonstrated theoretically, and then experimentally through the obtention of binary scaled boundary layers in the Plasmatron, a plasma wind tunnel at the von Karman Institute. The stagnation point heat fluxes were measured and exhibit a good agreement with the theoretical scaling law. This also validates the use of the binary scaling law in subsonic high enthalpy flows. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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