Evaluation of hydrogen-blended methane explosion

Abstract

The purpose of this work is to evaluate the characteristics of hydrogen-blend methane explosion. The explosion characteristics without initial turbulence or with initial turbulence are firstly explored. Then the factors affecting laminar burning velocity and turbulent flame regime are revealed. Finally, the different prediction models are developed to evaluate peak explosion pressure of hydrogen-blended methane fuel. The results indicated that the MFFV, PEP, PRPR and laminar burning velocity of MR = 10% and MR = 30% continue to increase with the increase of ER, the peak value of MFFV, PEP, PRPR and laminar burning velocity of other MRs is arrived at ER = 1.0. The MFFV, PEP and PRPR increase gradually with increasing root-mean-square velocity. Regardless of initial turbulence, the MFFV, PEP and PRPR continue to decrease with increasing MR, the PEP and PRPR decrease obviously with increasing distance from ignition location. The turbulent flame regime is highly sensitive to MR, not root-mean-square velocity. The predicted value of laminar model, wrinkled model and turbulent model is relatively conservative, maximum wrinkling coefficient induced by flame instabilities and flame front itself needs to accurately evaluated.