ダンプディフューザ形燃焼器内の流動機構 : 燃焼筒高さと急拡大部における傾斜壁の影響

抄録

The cold flow experiments are made in a two-dimensional dump diffuser. Flow behavior over a flame dome head and its reattachment to the casing wall are presented, when a symmetric or distorted flow is provided at the diffuser inlet. A Laser-Doppler Velocimeter was used for the velocity measurements. The effects of three types of flame tube depth and two types of vertical and inclined wall in a sudden expansion region on the diffuser performance are clarified. Both flame tube depth and inclination of the combustor wall are the dominant parameters affecting the diffuser performance of total pressure loss and flow rate distribution into the branched channels.