Impacts of Micro-Deviations of Aperture on the Characteristics of Collision Atomization Field

Applied Sciences

Hui Wang¹  Jiubin Tan¹  Jiwen Cui¹  Yarui Ma¹ 

[1] Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080, China;

关键词: drop collisions in sprays;    aperture deviation;    internal flow;    cavitation;    ultra-precise measurement;   

DOI  :  10.3390/app12094685

来源: DOAJ

【 摘 要 】

As the final flow channel of the liquid rocket engine, the manufacturing of impinging atomization nozzles has become a critical link in the manufacture of impinging atomization components. At present, the high-precision machining of millimeter nozzles in large-scale production is quite difficult, which inevitably leads to the diversity of internal flow field and atomization field parameters. In this investigation, the influence of the diameter deviation of impinging nozzles on the atomization field is analyzed by experiment. The transparent nozzle is installed in a typical colliding atomizer. The ultra-precision measurement is carried out by the optical fiber measurement system and the flow field in the nozzle is visualized. The information of atomized droplets in the atomization field is assembled by the laser interferometric particle imaging technology (IPI). The experimental results indicate that the micro-deviations of the collision aperture have a profound influence on the cavitation state of the flow field in the nozzles and the atomization characteristics (droplet diameter and atomization cone angle) of the atomization field.

【 授权许可】

Unknown