Comparison of different approaches to determine the effect of uncertainties in detailed chemistry on auto-ignition delay for air-hydrogen mixtures

International audienceThe propagation of uncertainties in the chemical reaction rate constants onto the auto-ignition delay of an air-hydrogen mixture is studied with different approaches. An analysis of variance is carried out to reduce the number of stochastic dimensions of the problem to three reactions for the investigated case. Comparisons between Monte-Carlo method, adaptative cubature method and Polynomial Chaos expansion are then made, regarding both the accuracy and the computational cost