Turbulent premixed natural gas - air flame velocities have been measured in a stationary axi-symmetric burner using LDA. The flame was stabilized by letting the flow retard toward a stagnation plate downstream of the burner exit. Turbulence was generated by letting the flow pass through a plate with drilled holes. Three different hole diameters were used, 3, 6 and 10 mm, in order to achieve different turbulent length scales. Turbulent integral length scales were measured using two-point LDA and the stretching in terms of the Karlovitz number could be estimated from these measurements. The results support previous studies indicating that stretching reduces the flame speed.
Measurements of Turbulent Flame Speed and Integral Length Scales in a Lean Stationary Premixed Flame
Sae Technical Papers
International Congress & Exposition ; 1998
23.02.1998
Aufsatz (Konferenz)
Englisch
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