Computation of Conditional Average Scalar Dissipation in Turbulent Jet Diffusion Flames |
| |
Authors: | A Kronenburg RW Bilger JH Kent |
| |
Institution: | (1) Department of Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW, 2006, Australia |
| |
Abstract: | The modelling of conditional scalar dissipation in locally self-similar turbulent reacting jets is considered. The streamwise
dependence in the transport equation of the conserved scalar pdf is represented by a function solely dependent on centreline
mixture fraction. This procedure provides a simple model suitable for non-homogeneous flows and ensures positive values for
conditional scalar dissipation. It has been tested in pure hydrogen-air jet diffusion flames using a Conditional Moment Closure
method with detailed 12species, 23 reactions chemistry. The calculations show good agreement of the averaged scalar dissipation
with reference values and the model proves to be superior to previous models based on homogeneous flows if the distribution
of the conditional scalar dissipation in mixture fraction space is compared with experimental results. A dependence of NO
predictions on the model of conditional scalar dissipation can be observed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | scalar dissipation turbulent diffusion flame modelling NO |
本文献已被 SpringerLink 等数据库收录! |