The Effects of Pressure on Turbulent Burning Velocity of Premixed Flames and Their Correlations with Lewis Number

Authors: Toshiaki Kitagawa, Kousaku Tsuneyoshi, and Andrew J. Smallbone

Reference: JSAE Transactions(18ICES/029), (2005)


The influence of pressure on spherically propagating propane-air premixed turbulent flames has been studied with experiments carried out using a constant volume fan-stirred combustion vessel. The effects of mixture strength (equivalence ratio  =0.8, 1.0 and 1.3) and turbulence intensity (u' =0.80 and 1.59m/s) have been studied for mixture pressures of 0.10 to 0.50MPa. It was noted that the ratio of the turbulent to unstretched laminar burning velocity (utn / ul ) increased with mixture pressure. Possible correlations of utn / ul were developed in terms of u' / ul, Markstein, Lewis and turbulent Reynolds numbers.

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