抄録
The flow structure and turbulence properties in a can-type model gas turbine combustor were investigated using two types of developed fiber LDV's. The behavior of the recirculation vortex formed in the primary zone was characterized with the negative flow rate and swirl number at different axial positions. It was found that the primary jets did not penetrate into the center axis but bent just from the exit and pushed the adjacent jet in the swirling direction, so that the toroidal vortex is formed near the center axis regardless of momentum ratio. The rms value of the three velocity components was measured and the turbulence energy profiles for different momentum ratios were obtained, which is indispensable to evaluate the numerical simulation. The outline of the flow in the combustor is drawn with four typical flows.
