A Development of the Fuel Atomizing Device Utilizing High Rotational Speed

Abstract

A fuel atomizing device was developed for a combustor of a small gas turbine engine. The device is a rotary atomizer in which liquid fuel is supplied through a stationary nozzle onto a specially shaped disc rotating with a high tangential velocity (over 200 m/sec). The rotary atomizer has shown remarkably good atomization characteristics when used in the engine. The mean droplet size of the atomizer is explained by the following equation for water: SMD = 0.033 • U−0.7 • Q0.2 • D0.3. The SMD for fuel can be evaluated by the correlation of: SMD∞(σ/ρ)0.5. The performance together with its configurations will be discussed in detail.