摘要
Self-pulsation in fuel injection is an important cause of combustion instability,and the "gas-like" nature of supercritical fuel makes its self-pulsation yield a more significant effect on oil-gas mixing and combustion. The self-pulsation of supercritical kerosene jets in the rotating flow field was investigated to find out the causes of the self-pulsation and the ways to suppress it. The supercritical kerosene injection processes under different companion flow conditions,recess ratios,and gas-liquid area ratios were investigated by using a high-speed schlieren technique using the proper orthogonal decomposition. The results showed that the oscillation modes of self-pulsation were represented by axial and radial oscillations,and the accompanying gas affected the self-pulsation region. When the gas-liquid area ratio was 674,the cause of self-pulsation was oil-associated gas interaction,and the self-pulsation decreased with the decrease of the recess ratio; when the gas-liquid area ratio was 416 and 178,the cause of self-pulsation was associated gas-environment interaction, and the self-pulsation increased with the decrease of the recess ratio.
投稿的翻译标题 | Effect of injection structure on the self-pulsation characteristics of supercritical RP-3 aviation kerosene jet |
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源语言 | 繁体中文 |
文章编号 | 20230359 |
期刊 | Hangkong Dongli Xuebao/Journal of Aerospace Power |
卷 | 40 |
期 | 3 |
DOI | |
出版状态 | 已出版 - 3月 2025 |
关键词
- injection
- proper orthogonal decomposition (POD)
- schlieren techniques
- self-pulsation
- supercritical fuels