%T Laminar flame speed of methane- air mixtures at atmospheric conditions %A A.A. Yousif %A S.A. Sulaiman %I Institute of Physics Publishing %V 16 %C Beijing %K Air; Methane, Atmospheric conditions; Constant pressures; Equivalence ratios; Experimental studies; Flame propagation speed; Laminar burning velocity; Laminar flame speed; Spherically expanding flame, Mixtures, experimental study; flow velocity; laminar flow; methane %X An experimental study on spherically expanding flames propagation of methane- air mixtures was conducted at constant pressure to measure unstretched laminar flame speeds, laminar burning velocity and flame stretch. The mixtures were ignited at equivalence ratios of 0.7, 0.9 and 1.0, under ambient pressure and temperature. It was found that the unstretched laminar burning velocity increased with the equivalence ratio. The flame propagation speed showed different trends at different equivalence ratio for tested mixtures. © Published under licence by IOP Publishing Ltd. %O cited By 1; Conference of 26th IAHR Symposium on Hydraulic Machinery and Systems ; Conference Date: 19 August 2012 Through 23 August 2012; Conference Code:95632 %J IOP Conference Series: Earth and Environmental Science %L scholars3968 %D 2013 %R 10.1088/1755-1315/16/1/012074 %N 1