Clarke, Jason and Wandel, Andrew P. and Mastorakos, E. (2010) Analysis of data to develop models for spray combustion. In: 2010 Southern Region Engineering Conference (SREC 2010), 11-12 Nov 2010, Toowoomba, Australia.
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Modern combustion systems are being designed to operate closer to the lean combustion limit in order to improve fuel economy, reduce operating noise and reduce the production of pollutants. However, this increases the chances of misfiring occurring, particularly when the fuel is injected into the combustion chamber in liquid form and heat is required to vaporise the fuel so that it is available for combustion. Modelling of this process is required to aid in the development of new combustion systems; the Conditional Moment Closure (CMC) model is well suited for such modelling. However, the behaviour of key terms in the CMC transport equation — the conditional scalar dissipation, mixture fraction probability density function (PDF) and conditional source term — is not understood well for this case. Note that the conditional source term only appears when one of the key reactants changes state to become a gas. A Direct Numerical Simulation (DNS) study was performed to collect data on successful and unsuccessful combustion when the fuel is fully comprised of liquid droplets in cold air and spark power is used to evaporate the fuel and ignite the mixture. The data from the DNS are being used to develop models for the three key terms required for CMC modelling.
|Item Type:||Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)|
|Additional Information:||USQ conference. Proceedings of this conference can be found at http://www.usq.edu.au/engsummit/proceedings|
|Uncontrolled Keywords:||spray combustion; DNS; CMC|
|Depositing User:||Dr Andrew Wandel|
|Date Deposited:||04 Feb 2011 05:17|
|Last Modified:||03 Jul 2013 00:27|
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