关键词: 气动多点供油;雾化;燃油流量;燃烧技术

Abstract: In order to investigate the atomization performance of an partial premixed and evaporated air-assisted multi-point fuel supply device suitable for cavity flame stabilizer, the fuel flow distribution and the Sauter mean diameter (SMD) distribution downstream of the multi-point fuel supply device were obtained by a fuel collector and a phase Doppler particle analyzer (PDA). The flow field inside and outside the fuel supply device, together with the fuel-to-air momentum ratio distribution, were obtained through numerical simulation, which can be seen as the cause of the flux and particle size distribution. The results show that, the downstream fuel of the multi-point fuel supply device is mainly concentrated in the rear section of the distribution pipe. A relatively uniform fuel flow distribution can be acquired inside the downstream spray field corresponding to this location. The well-atomized region in the spray field is approximately an outward inclining belt with a measured SMD around 20μm. Changes in the internal flow lines of the multi-point fueling device lead to an unequal flow in the orifices on the distribution pipe, which in turn causes a change in the fuel-to-air ratio downstream of the distribution pipe, directly forming the distribution of the downstream fuel flow and the Sauter mean diameter.

Key words: Air-assisted multi-point fuel supply;Atomization;Fuel flux;Combustion technology