Experiment on primary atomization of flat prefilm nozzle under high temperature and high pressure

被引：0

作者：

Zhang J. ^{[1
]}

Di D. ^{[1
]}

Zhang P. ^{[1
]}

Zhang T. ^{[1
]}

Yan Y. ^{[1
]}

Li J. ^{[1
]}

机构：

[1] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Hangkong Dongli Xuebao/Journal of Aerospace Power | 2022年 / 37卷 / 01期

关键词：

Atomization characteristics; High temperature and high pressure; Prefilm nozzle; Primary atomization; Proper orthogonal decomposition;

D O I：

10.13224/j.cnki.jasp.20210047

中图分类号：

学科分类号：

摘要：

In order to deeply explore the primary atomization mechanism of prefilm nozzle, the influences of different working parameters on the primary atomization characteristics of flat prefilm nozzle under high temperature and high pressure were experimentally studied.The atomization characteristics such as liquid film thickness, liquid film fluctuation pattern and Sauter mean diameter (SMD) of the prefilm plate were obtained by high⁃speed photography visualization technology and Malvern particle size analyzer.The film thickness of extraction solution was obtained by image post⁃processing technology.The experimental results showed that the film thickness decreased with the increase of inlet pressure, inlet temperature and inlet Weber number, and increased with the increase of fuel flow rate.Proper orthogonal decomposition (POD) was used to perform fast Fourier transform on the main mode time coefficients of liquid film fluctuation.The experimental results also showed that under the same working conditions, the fluctuation frequency of liquid film presented opposite result with the change of liquid film thickness.When the inlet pressure changed, the inlet Weber number kept unchanged.The experimental results showed that the inlet pressure had no obvious effect on the average size of the final droplet, demonstrating that the inlet Weber number is more suitable for characterizing the fuel atomization effect, and the droplet size decreases with the increase of inlet Weber number. © 2022, Editorial Department of Journal of Aerospace Power. All right reserved.

引用

页码：55 / 66

页数：11

共 21 条

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