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Details van artikel 123 van 243 gevonden artikelen
| Titel: |
Influence of Buoyancy on Turbulent Hydrogen/Air Diffusion Flames |
| Auteur: |
Pergament, H. S. Fishburne, E. S. |
| Verschenen in: |
Combustion science and technology |
| Paginering: | Jaargang 18 (1978) nr. 3-4 pagina's 127-137 |
| Jaar: |
1978-06-01 |
| Inhoud: |
A model which treats the axisymmetric turbulent mixing of co-flowing streams, including non-equilibrium chemistry, is applied to the prediction of buoyant H2/air diffusion flame properties. The model, which employs the Donaldson/Gray eddy viscosity formulation, is first tested against the nonbuoyant laboratory H2/air flame data of Kent and Bilger. It is shown that centerline temperatures and species mole fractions can be predicted to good accuracy. However, the calculated rate of radial transport of energy and mass is greater than that measured in the laboratory experiments. The results of a series of parametric calculations on buoyant flames and comparisons with buoyant flame length data show that: (1) flame properties scale with nondimensional distance for Froude numbers (Fr) greater than about 106, (2) buoyancy significantly affects temperature decay rates downstream of the location of maximum temperature (after all the H2 has burned), and (3) the predicted influence of Fr on buoyant flame lengths is consistent with the available data. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 123 van 243 gevonden artikelen
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