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Measurement of airblast atomization of low temperature kerosene with 25 kHz digital holography

机译：测量低温煤油的空质雾化，具有25 kHz数字全息术

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摘要

Atomization of low temperature fuel is of great importance in a jet engine combustor, and its visualization and diagnostics are challenging, especially in the presence of shreds and ligaments. A 25 kHz picosecond pulsed digital inline holography system is applied to measure the spray produced by an airblast atomizer with low temperature kerosene. The breakup process of shreds and ligaments of -37 degrees C kerosene are visualized and analyzed, revealing the transition of liquid jet disintegrating into droplets under the atomizing air film. Three-dimensional positions and size distributions of droplets in spray are acquired. It is found that a decrease in the kerosene temperature increases shreds and ligaments in the spray, which eventually leads to reduction of droplet density and increase of droplet size, while increasing the air pressure can compensate the degradation. This work also demonstrates that high speed holographic imaging is a powerful tool in spray diagnostics and liquid breakup visualization. (C) 2020 Optical Society of America
机译：低温燃料雾化在喷气发动机燃烧室中非常重要，其可视化和诊断具有挑战性，尤其是在存在碎片和韧带的情况下。采用25kHz皮秒脉冲数字在线全息术系统测量了低温煤油气动雾化器产生的喷雾。对-37℃煤油的碎片和韧带的破碎过程进行了可视化和分析，揭示了液体射流在雾化空气膜下分解为液滴的转变。获得了喷雾中液滴的三维位置和尺寸分布。研究发现，煤油温度降低会增加喷雾中的碎片和韧带，最终导致液滴密度降低和液滴尺寸增大，而增加空气压力可以补偿降解。这项工作还表明，高速全息成像是喷雾诊断和液体破裂可视化的有力工具。（C） 2020美国光学学会

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  • 来源
    《Applied optics》 |2021年第4期|共9页
  • 作者

    Wu Xuecheng; Lin Wenhui; Wang Lei; Song Ge; Wu Yingchun;

  • 作者单位

    Zhejiang Univ State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

    Zhejiang Univ State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

    Zhejiang Univ State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

    Aero Engine Corp China Beijing 100089 Peoples R China;

    Zhejiang Univ State Key Lab Clean Energy Utilizat Hangzhou 310027 Peoples R China;

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