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Centre of basic and applied research specialized in modelling and numerical simulation, Cerfacs, through its facilities and expertise in high-performance computing, deals with major scientific and technical research problems of public and industrial interest.

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NEWS

First 360-degrees Large-Eddy Simulation of a full engine

Jérôme DOMBARD |  17 June 2020

Within the PRACE project FULLEST (First fUlL engine computation with Large Eddy SimulaTion), a joint collaboration between CERFACS, SAFRAN and AKIRA technologies, Dr. C. Pérez Arroyo (post doctoral fellow at CERFACS) has carried out under the supervision of Dr. J. Dombard the first high-fidelity simulation of a part of the real engine DGEN380 (for now, from the fan to the combustion chamber). This 360-degrees integrated large-eddy simulation contains around two billion cells on the three instances, carried out with the AVBP code of CERFACS.  The CPU cost is obviously large but still within reach, performing around one turn of fan during 5 days over 14400 skylake cores. Post-treatments are in progress and already show, among other complex phenomena, a strong interaction between the high pressure compressor and the combustion chamber (see forthcoming paper GT2020-16288 C. Pérez Arroyo et al). Below a video showing: in the fan an isosurface at mid-height of the vein colored by the Mach number, in the high pressure compressor a gradient of density, in the bypass of the combustion chamber the static pressure and in the flame tube a temperature field. One of the goals of the project is to create a high-fidelity unsteady database to study interactions between modules and may help other teams to develop new lower order models and/or validate existing ones. Beyond the feasibility and the maturity of the AVBP code, this kind of calculation is an important milestone for the aeronautical industry and would allow to apprehend earlier in the design the effect of integration and installation and thus, to reduce the cycle and therefore the cost of the future aircraft engines. We acknowledge PRACE for awarding us access to Joliot-Curie (Genci) hosted at CEA/TGCC, FRANCE, Safran Tech and DGAC fundings within the project ATOM, along with the invaluable technical support at...Read more


B. Cuenot distinguished as Program Chair of international Symposium on Combustion

superadmin |  29 May 2020

B. Cuenot has been distinguished as Program Chair for the 39th International Symposium on Combustion, to be held in Vancouver (Canada) in 2022. The International Symposium on Combustion is a major event for the combustion community, where the current best research is presented.Read more

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RESEARCH PUBLICATIONS

Roberts, M. J., Bellucci, A., Vannière, B., Camp, J., Roberts, C. D., Putrashan, D., Mecking, J., Hodges, K., Terray, L., Caron, L. P., Vidale, P. L., Haarsma, R., Senan, R., Seddon, J., Moine, M. -P., Kodama, C., Yamada, Y., Zarzycki, C., Ullrich, P., Mizuta, R., Fu, D., Danabasoglu, G., Wu, L., Rosenbloom, N. A., Zhang, Q., Scoccimarro, E., Chauvin, F., Valcke, S. and Wang, H. (2020) Projected Future Changes in Tropical Cyclones using the CMIP6 HighResMIP Multi-model Ensemble, Geophysical Research Letters, 47 (14), pp. e2020GL088662, doi:10.1029/2020GL088662

[pdf] [doi]

@ARTICLE{AR-CMGC-20-58, author = {Roberts, M.J. and Bellucci, A. and Vannière, B. and Camp, J. and Roberts, C.D. and Putrashan, D. and Mecking, J. and Hodges, K. and Terray, L. and Caron, L.P. and Vidale, P.L. and Haarsma, R. and Senan, R. and Seddon, J. and Moine, M.-P. and Kodama, C. and Yamada, Y. and Zarzycki, C. and Ullrich, P. and Mizuta, R. and Fu, D. and Danabasoglu, G. and Wu, L. and Rosenbloom, N.A. and Zhang, Q. and Scoccimarro, E. and Chauvin, F. and Valcke, S. and Wang, H. }, title = {Projected Future Changes in Tropical Cyclones using the CMIP6 HighResMIP Multi-model Ensemble}, year = {2020}, number = {14}, volume = {47}, pages = {e2020GL088662}, doi = {10.1029/2020GL088662}, journal = {Geophysical Research Letters}, pdf = {https://cerfacs.fr/wp-content/uploads/2020/05/GlobC-Article-Valcke-essoar.10503125.1.2020.pdf}}

Bador, M., Boé, J., Terray, L., Alexander, L. V., Baker, A., Bellucci, A., Haarsma, R., Koenigk, T., Moine, M. -P., Lohmann, K., Putrasahan, D., Roberts, C., Roberts, M., Scoccimarro, E., Schiemann, R., Seddon, J., Senan, R., Valcke, S. and Vannière, B. (2020) Impact of higher spatial atmospheric resolution on precipitation extremes over land in global climate models, Journal of Geophysical Research, 125 (13), pp. e2019JD032184, doi:10.1029/2019JD032184

[Supplementary Material] [doi]

@ARTICLE{AR-CMGC-20-60, author = {Bador, M. and Boé, J. and Terray, L. and Alexander, L.V. and Baker, A. and Bellucci, A. and Haarsma, R. and Koenigk, T. and Moine, M.-P. and Lohmann, K. and Putrasahan, D. and Roberts, C. and Roberts, M. and Scoccimarro, E. and Schiemann, R. and Seddon, J. and Senan, R. and Valcke, S. and Vannière, B. }, title = {Impact of higher spatial atmospheric resolution on precipitation extremes over land in global climate models}, year = {2020}, number = {13}, volume = {125}, pages = {e2019JD032184}, doi = {10.1029/2019JD032184}, journal = {Journal of Geophysical Research}, supplementaryMaterial = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JD032184}}

Boé, J., Terray, L., Moine, M. -P., Valcke, S., Bellucci, A., Drijfhout, S., Haarsma, R., Lohmann, K., Putrasahan, D., Roberts, C. D., Roberts, M. J., Scoccimarro, E., Senan, R. and Wyser, K. (2020) Past long-term summer warming over western Europe in new generation climate models: role of large-scale atmospheric circulation, Environmental Research Letters, doi:10.1088/1748-9326/ab8a89

[pdf] [doi]

@ARTICLE{AR-CMGC-20-52, author = {Boé, J. and Terray, L. and Moine, M.-P. and Valcke, S. and Bellucci, A. and Drijfhout, S. and Haarsma, R. and Lohmann, K. and Putrasahan, D. and Roberts, C.D. and Roberts, M.J. and Scoccimarro, E. and Senan, R. and Wyser, K. }, title = {Past long-term summer warming over western Europe in new generation climate models: role of large-scale atmospheric circulation}, year = {2020}, doi = {10.1088/1748-9326/ab8a89}, journal = {Environmental Research Letters}, pdf = {https://iopscience.iop.org/article/10.1088/1748-9326/ab8a89}}

Dupuy, F., Gatti, M., Mirat, C., Gicquel, L. Y. M. and Nicoud, F. (2020) Combining analytical models and LES data to determine the transfer function from swirled premixed flames, Combustion and Flame, 217 (July), pp. 222-236, doi:10.1016/j.combustflame.2020.03.026

[doi]

@ARTICLE{AR-CFD-20-76, author = {Dupuy, F. and Gatti, M. and Mirat, C. and Gicquel, L.Y.M. and Nicoud, F. }, title = {Combining analytical models and LES data to determine the transfer function from swirled premixed flames}, year = {2020}, number = {July}, volume = {217}, pages = {222-236}, doi = {10.1016/j.combustflame.2020.03.026}, journal = {Combustion and Flame}, abstract = {A methodology is developed where the acoustic response of a swirl stabilized flame is obtained from a reduced set of simulations. Building upon previous analytical Flame Transfer Functions, a parametrization of the flame response is first proposed, based on six independent physical parameters: a Strouhal number, the mean flame angle with respect to the main flow direction, the vortical structures convection speed, a swirl intensity parameter, a time delay between acoustic and vortical perturbations, as well as a phase shift between bulk and local velocity signals. It is then shown how these parameters can be deduced from steady and unsteady simulations. The methodology is applied to a laboratory scale premixed swirl stabilized flame exhibiting features representative of real aero-engines. In this matter, cold and reactive flow Large Eddy Simulations are first validated by comparing results with reference data from experiments. The high fidelity simulations are seen to be able to capture the flame structure and velocity profiles at different locations while forced flame dynamics for the frequency range of interest also match the experimental data. From the same analytical transfer function model, three methodologies of increasing complexity are presented for the determination of the model parameters, depending on the available data or computational resources. A first estimation of the flame acoustic response is obtained by evaluating parameters from a single stationary flame simulation in conjunction with analytical estimations for the acoustic-convective time delay. Flame dynamics and swirl related parameters can then be determined from a series of robust treatments on pulsed simulations data to improve the model accuracy. It is shown that good qualitative agreement for the flame transfer function can be obtained from a single non-forced simulation while quantitative agreement over the frequency range of interest can be obtained using additional reactive or non-reactive pulsed simulations at one single forcing frequency corresponding to a local gain minimum. The method also naturally handles different perturbation levels.}, keywords = {Flame transfer Function, Swirling flame, Large Eddy Simulation, Analytical model}}

Menary, M. B., Robson, J., Allan, R. P., Booth, B. B. B., Cassou, C., Gastineau, G., Gregory, J., Hodson, D., Jones, C., Mignot, J., Ringer, M., Sutton, R., Wilcox, L. and Zhang, R. (2020) Aerosol‐Forced AMOC Changes in CMIP6 Historical Simulations, Geophysical Research Letters, 47 (14), doi:10.1029/2020GL088166

[pdf] [doi]

@ARTICLE{AR-CMGC-20-78, author = {Menary, M.B. and Robson, J. and Allan, R.P. and Booth, B.B.B. and Cassou, C. and Gastineau, G. and Gregory, J. and Hodson, D. and Jones, C. and Mignot, J. and Ringer, M. and Sutton, R. and Wilcox, L. and Zhang, R. }, title = {Aerosol‐Forced AMOC Changes in CMIP6 Historical Simulations}, year = {2020}, number = {14}, volume = {47}, doi = {10.1029/2020GL088166}, journal = {Geophysical Research Letters}, pdf = {https://cerfacs.fr/wp-content/uploads/2020/07/GlobC-Article-Aerosol‐Forced-AMOC-Changes-in-CMIP6-2020-GRL.pdf}}

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Impact of climate change on clear air turbulence for aviation

 

Context: In the context of the CERFACS / AIRBUS / Météo-France collaboration and the "Climate and...Read more


Numerical simulation of metal particle combustion

 

Context: Metal powder is a very energetic material, which may be used as a fuel. However...Read more

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