Numerical Study of the Hydrogen/Air Combustion with CEDRE on LAERTE Dual Mode Ramjet Combustion Experiment

摘要

In the frame of the LAPCAT Ⅱ project (European 7th Framework Program) dealing with the preliminary design of a high-speed civilian transport airplane, the study of high-speed hydrogen combustion has been performed. First, some experiments were performed within the Dual Mode Ramjet combustor (connected tube) of the ONERA-LAERTE facility and, secondly, some simulations were realized with the CFD code CEDRE. For one test condition and one geometry, several computations have been carried out for different sizes of mesh, different roughness of the walls, different combustion models and different turbulence models. Also, the role of the wall temperature on the behavior of the hydrogen/air combustion has been investigated. These numerical results have been compared to the experiments in order to specify which simulation parameters should be preferred to run hydrogen/air combustion computations. These computations showed that the mesh refinement at walls and the wall temperature have a major influence on the combustion behavior as the fuel injections are located at walls. Moreover, k-Ω SST turbulence model and Jachimowski combustion model gave the most accurate results compared to tests.