[1]武浩,章振宇,张付军.低压双流体雾化的液滴与流场特性分析[J].内燃机学报,2022,(06):528-536.
　Wu Hao,Zhang Zhenyu,Zhang Fujun.Analysis of Droplet Characteristics and Flow Field Under Low-Pressure Twin-Fluid Atomization[J].,2022,(06):528-536.
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低压双流体雾化的液滴与流场特性分析
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年06
页码:
528-536
栏目:
出版日期:
2022-11-25

文章信息/Info

Title:
Analysis of Droplet Characteristics and Flow Field Under Low-Pressure Twin-Fluid Atomization
作者:
武浩; 章振宇; 张付军
北京理工大学 机械与车辆学院，北京 100081
Author(s):
Wu Hao; Zhang Zhenyu; Zhang Fujun
School of Mechanical Engineering，Beijing Institute of Technology，Beijing 100081，China
关键词:
双流体雾化; 喷雾特性; 液滴直径分布; 湍流破碎
Keywords:
twin-fluid atomization; spray characteristics; droplet diameter distribution; turbulent break-up
分类号:
TK413.8
文献标志码:
A
摘要:
对低压双流体雾化方式产生的气/液两相射流的喷雾宏观特性与液滴微观特性进行了研究．采用背光成像技术对喷雾宏观形态进行可视化观测，得到喷雾形态的演变以及外部扩散特性；采用相位多普勒粒子分析仪(PDPA)对流场内的液滴速度和直径进行测量，并进一步分析液滴与气流的相互作用．结果表明：气/液混合射流产生的喷雾流场呈高度湍流状态，油、气质量比对喷雾的宏观微观特性和微观特性均有明显的影响．液滴的索特平均直径(SMD)处于10～20μm范围内，最大液滴直径接近40μm．喷雾中的大尺度液滴难以发生剪切破碎，但存在进一步发生湍流破碎的可能．
Abstract:
Spray macroscopic characteristics and droplet microscopic characteristics of the gas-liquid two-phase jet under low-pressure twin-fluid atomization were experimentally investigated. Backlight imaging technology was used to visually observe the spray in order to obtain time-resolved evolution of spray morphology and external diffusion characteristics. Phase-doppler particle anemometer(PDPA) was used to measure droplet velocity and diameter within the flow field in order to further analyze the interaction between droplets and airflow. The results show that the flow field of the gas-liquid two-phase jet spray is highly turbulent，and the mass ratio of liquid fuel to gas has a significant effect on the macro and micro characteristics of the spray. The droplet Sauter mean diameter(SMD) is within the range of 10—20μm，and the maximum droplet diameter is close to 40μm. Large-scale droplets in the spray are difficult to undergo shear break-up，but the possibility of further turbulent break-up exists.

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更新日期/Last Update: 2022-11-25