Large eddy simulation of hydrogen combustion in supersonic flows using an Eulerian stochastic fields method. (12th January 2017)

• Record Type: Journal Article
• Authors: Gong, Cheng; Jangi, Mehdi; Bai, Xue-Song; Liang, Jian-Han; Sun, Ming-Bo
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 2(2017)
• Page Start: 1264
• Page End: 1275
• Publication Date: 2017-01-12
• Subjects: Transported probability density function -- Eulerian stochastic fields -- Large eddy simulation -- Supersonic -- Local-extinction -- Re-ignition; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.09.017
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: An Eulerian Monte-Carlo approach, the so-called Eulerian stochastic fields (ESF) method is implemented and evaluated for simulation of non-premixed hydrogen/air combustion in supersonic flows. The ESF method is integrated into a compressible flow large eddy simulation (LES) solver, and validated on a supersonic combustor with a strut as flame-holder. Comparison with experimental data and with results from a well-stirred reactor (WSR) model demonstrates the advantage of the LES-ESF method for simulation of local-extinction and re-ignition phenomena. The hydrogen/air flame structure and the stabilization of the combustion process in the supersonic combustor are analysed based on the present LES-ESF method. Oscillation of the recirculation zones is found to be the dominant mechanism for the local-extinction/re-ignition and the flame stabilization under the present condition. Highlights: An developed Eularian stochastic fields method for supersonic combustion. The Eularian stochastic fields method is evaluated on the DLR supersonic combustor. The local-extinction/re-ignition process in the DLR combustor is well predicted. The mechanism of the local-extinction/re-ignition process is analysed.