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The 13 October 2017

Modal analysis of thermoacoustic instabilities using the AVSP solver

nasri |  

Deadline for registration: 15 days before the starting date of each training
Duration : 1 day / (6 hours)



This training session aims at learning the participants the basics of combustion instabilities as well as how to use the thermoacoustic code AVSP developed at Cerfacs. The latter is a general purpose Helmholtz solver which computes the frequency of oscillation, growth rate and spatial structure of the thermoacoutic modes of interest. Several test cases are considered during this one day training session in order to get the participants acquainted with the different features of AVSP (speed of sound inhomogeneities, complex valued boundary impedance, multi-perforated liners, acoustic flame coupling, multi-burner annular combustors, …).

Target participants

This training session is for engineers, physicists, computer scientists and numerical analysts who wish to learn on thermoacoustic instabilities.


Unix, Fortran, numerical simulation.

Scientific contact : Franck Nicoud


  • Trainees/PhDs/PostDocs : 50 €
  • CERFACS shareholders/CNRS/INRIA : 150 €
  • Public : 300 €


( from 9h15 to 17h)
9h15 Welcome and coffee
9h30 Modeling thermoacoustic instabilities – Introduction, Equations of linear acoustics, Modeling of the flame
10h15 How does AVSP work, Files – general organization – boundary conditions.
11h00 Hands-on work on computers , Basic cases – eigenvalues and eigenmodes ,1D pipe ( without and with impedance), Multiperforated cylinder, 1D pipe with an active flame


14h00 Hands-on work on computers, Complex geometries and post-processing, 2D and 3D configurations with sudden enlargement, Industrial configurations (one single sector)


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