Observations of Flame Behavior in a Laboratory-Scale Pre-Mixed Natural Gas/Air Gas Turbine Combustor From LDA Velocity Measurements

The objective of this study was to obtain simultaneous axial/radial and axial/tangential velocity measurements in a laboratory-scale, gas-turbine combustor (LSGTC) with a pre-mixed, swirl-stabilized, natural gas flame. Velocity measurements were obtained at each of four operating conditions (high swirl and medium swirl at fuel equivalence ratios of 0.80 and 0.65). Example results of mean and standard deviation axial, radial, and tangential velocities are included in this paper for the high swirl (HS), φ = 0.80 case (most stable flame) and the medium swirl (MS), φ = 0.65 case (least stable case). Additionally, example probably density distributions (PDF) for the axial velocity at the 80 mm axial location are presented for the same two cases.