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THIS SOFTWARE IS OPEN SOURCE. TO DOWNLOAD, PLEASE CLICK ON THE LINK NEAR THE BOTTOM OF THE PAGE.

OSCILOS is an open source code for simulating combustion instability. It is written in Matlab® / Simulink® and is very straightforward to run and edit.

  • Simulates both longitudinal and annular combustor geometries.
  • Represents a combustor as a network of connected modules.
  • Acoustic waves are modelled as either 1-D plane waves (longitudinal combustors) or 2-D plane/circumferential waves (annular combustors).
  • A variety of inlet and exit acoustic boundary conditions are possible, including open, closed, choked and impedance boundary conditions.
  • The response of the flame to acoustic waves is captured via a flame model; flame models ranging from linear n-tau models to non-linear flame describing functions can be prescribed.
  • The mean flow is calculated simply by assuming 1-D flow conditions, with changes only across module interfaces or flames; the capability to couple with the mean flow obtained from CFD simulations will be added in the future. 

OSCILOS is being developed by Dr Aimee Morgans and co-workers in the Department of Aeronautics, Imperial College.

To download OSCILOS, please click on the link below:

Note: The link above is to an external site. Imperial Innovations and Imperial College are not responsible for the content of external websites. Users proceed at their own risk.

 

 

More information on OSCILOS can be found in the following papers:

Li and Morgans (2015) Time domain simulations of nonlinear thermoacoustic behaviour in a simple combustor using a wave-based approach, J. Sound and Vibration 346:345-60

Han, Li and Morgans (2015) Prediction of combustion instability limit cycle oscillations by combining flame describing function simulations with a thermoacoustic network model, Combustion and Flame 162:3632–3647

Yang and Morgans (2015) Helmholtz resonators for damping combustor thermoacoustics, 22nd International Congress on Sound and Vibration, 22nd International Congress on Sound and Vibration

Morgans and Li (2015) The effect of entropy noise on combustion instability in the presence of advective shear dispersion, 22nd International Congress on Sound and Vibration

OSCILOS

Matlab/Simulink simulation tool for combustion instability

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