Combustion instability phenomenon arises from the coupling between heat release and acoustics. Several studies have been carried out in the past years with very dierent tools, from analytical studies to high delity simulations, like large eddy simulations (LES) or hybrid RANS-LES simulations. Despite the promising results, the computational eort required for such detailed numerical tools can be prohibitive for many applications. For this reason simplied models represent an alternative approach that needs to be improved. The main dierence between the simplied approaches with respect to detailed simulations is the necessity, for the former, of the preliminary knowledge of response functions, describing the coupling between heat release and acoustics. Looking for response function suitable to model longitudinal combustion instabilities in one-dimensional formulations, three dierent approaches are presented to extract them from hybrid RANS-LES simulations data.
Determination of heat release response function from 2D hybrid RANS-LES data for the CVRC combustor / Frezzotti, MARIA LUISA; Nasuti, Francesco; Huang, C.; Merkle, C.; Anderson, W. E.. - ELETTRONICO. - 2:(2015), pp. 1636-1648. (Intervento presentato al convegno 51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015 tenutosi a ORLANDO, FL USA nel 2015) [10.2514/6.2015-3841].
Determination of heat release response function from 2D hybrid RANS-LES data for the CVRC combustor
FREZZOTTI, MARIA LUISA;NASUTI, Francesco;
2015
Abstract
Combustion instability phenomenon arises from the coupling between heat release and acoustics. Several studies have been carried out in the past years with very dierent tools, from analytical studies to high delity simulations, like large eddy simulations (LES) or hybrid RANS-LES simulations. Despite the promising results, the computational eort required for such detailed numerical tools can be prohibitive for many applications. For this reason simplied models represent an alternative approach that needs to be improved. The main dierence between the simplied approaches with respect to detailed simulations is the necessity, for the former, of the preliminary knowledge of response functions, describing the coupling between heat release and acoustics. Looking for response function suitable to model longitudinal combustion instabilities in one-dimensional formulations, three dierent approaches are presented to extract them from hybrid RANS-LES simulations data.File | Dimensione | Formato | |
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