Skills in CFD methods will be acquired. This will allow the ESR to calculate the rate of heat release distributed over the combustor domain. Reaction progress variable models are available, and the ESR will be taught how to predict unsteady turbulent combustion at high-amplitude oscillations in syngas and natural gas flames. This work will be performed with the CFD and combustion tools developed in the earlier projects DESIRE, HEGSA and FLUISTCOM. The calculated rate of heat release will be relevant to the use of numerical methods (FEM, lumped parameter) to calculate the propagation of pressure fluctuations in the combustor with variable end conditions. Specific attention will be given to: nonlinear thermo-acoustic behaviour of the system, compact or distributed heat release, vibrating walls, end conditions, turbulent damping and temperature gradients in the fluid.