Abstract
An experiment by taking photos of the spray field behind plain orifice atomizer was conducted to study its atomization in preheated air flow. The air flow condition was 0.14~0.2 Mach number and 300~400°C. Fuel-to-air momentum flux ratioQvaried from 0.4 to 9, and Weber numberWecovered the range of 60~140. Photos were analyzed by Matlab image processing toolbox. The results indicate that under the experiment conditions: (1) Under the same temperature, jet breakup length increases withQincreasing, and decreases with the increase ofWe. (2) As the air flow temperature increases from 300°C to 400°C, jet and air flow interaction affect the liquid column breakup more greatly than surface tension. (3) Under the same temperature, spray angle increases with the increase ofQ. (4) As the air flow temperature increases from 300°C to 400°C, evaporation affects the atomization more greatly than pneumatic nebulization.
Publisher
Trans Tech Publications, Ltd.
Reference17 articles.
1. Xiaohua Gan, Aero gas gurbine engine fuel nozzle technology[M]. Beijing, 2006: 22-23. (in Chinese).
2. Schweitzer P H. Mechanism of disintegration of liquid jets [J]. Journal of Applied Physics, 1937, 8(8): 513-521.
3. Abramovich G N, Girshovich T A, Krasheninnikov S I, et al. The theory of turbulent jets [J]. Moscow Izdatel Nauka, 1984, 1.
4. K. Yokota, S. Matsuoka. An experimental Study of Fuel Spray in a Diesel Engine [J]. JSME, 1977, Vol. 43: 373～383.
5. Reitz R D, Bracco F B. On the dependence of spray angle and other spray parameters on nozzle design and operating conditions [J]. Future, 1979, 2012: 12-11.