Atomization of Centrifugal Atomizers and Improved Performance by Added Airflow Interaction

摘要

In the present paper, atomization of two types of centrifugal atomizer used in aero-engine was experimentally studied. To improve their atomization quality, airflow was inducted into these atomizers to form new tapes, termed as pneumatic and air-assist atomizers. Experiments were conducted with kerosene at room temperature and atmospheric pressure. The experiments show that for both centrifugal atomizers, a higher pressure of fuel supply will result in a smaller spray droplet SMD, and vise versa. But at a lower pressure the atomization quality is fairly poor. As the pressure lower than 0.6MPa, the spray droplet SMD will be approximately larger than 70 μ m. After improved from pure centrifugal to pneumatic and air-assist atomizers, under the interaction of airflow and fuel flow, atomization quality of the atomizers was greatly improved, especially at low fuel pressure supply conditions.