Measurement of turbulent flame propagation rates of methane using a new facility
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This paper presents results from the turbulent flame speed experiments conducted in a recently developed fan-stirred, cylindrical flame bomb. The high-pressure vessel has four fans installed at its central circumference which generate homogeneous and isotropic turbulence with negligible mean flow. Using this arrangement, RMS turbulence intensity of 1.5 m/s with an integral length scale of 27 mm was measured at the lowest fan speed (8300 rpm). Turbulent combustion experiments of stoichiometric methane in air at 1 atm and 298 K were conducted. Schlieren imaging revealed a lamella-like flame surface which increased as the flame grew in size. A global displacement speed of 66 cm/s was measured when the flame diameter was twice the integral length scale. This value yielded a corresponding turbulent burning velocity of 129 cm/s. These turbulent propagation rates agree well with those obtained from the literature. © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
author list (cited authors)
Ravi, S., Ruelas, A. M., & Petersen, E. L.