%X In the present work, experimental investigation on laminar combustion of iso-butane-air mixtures was conducted in constant volume explosion vessel. The experiments were conducted at wide range of equivalence ratios ranging between δ = 0.6 and 1.4 and atmospheric pressure of 0.1 MPa and ambient temperature of 303K. Using spherically expanding flame method, flame parameters including stretched, unstretched flame propagation speeds, laminar burning velocities and Markstein length were calculated. For laminar burning velocities the method of error bars of 95 confidence level was applied. In addition, values of Markstein lengths were measured in wide range of equivalence ratios to study the influence of stretch rate on flame instability and burning velocity. It was found that the stretched flame speed and laminar burning velocities increased with equivalence ratios and the peak value was obtained at equivalence ratio of δ = 1.1. The Markstein length decreased with the increases in equivalence ratios, which indicates that the diffusion thermal flame instability increased at high equivalence ratios in richer mixture side. However, the total deviations in the laminar burning velocities have discrepancies of 1.2-2.9 for all investigated mixtures. © Owned by the authors, published by EDP Sciences, 2016.
%K Atmospheric pressure; Butane; Combustion; Equivalence classes; Mixtures, Ambient conditions; Equivalence ratios; Experimental investigations; Flame instability; Flame propagation speed; Laminar burning velocity; Laminar combustion; Spherically expanding flame, Velocity
%D 2016
%R 10.1051/matecconf/20163801010
%O cited By 4; Conference of UTP-UMP Symposium on Energy Systems 2015, SES 2015 ; Conference Date: 7 October 2015; Conference Code:121434
%J MATEC Web of Conferences
%L scholars7257
%T An experimental measurement on laminar burning velocities and markstein length of iso-butane-air mixtures at ambient conditions
%I EDP Sciences
%A A.A. Yousif
%A S.A. Sulaiman
%A M.S. Nasif
%V 38