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Supersonic flow imaging via nanoparticles

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Abstract

Due to influence of compressibility, shock wave, instabilities, and turbulence on supersonic flows, current flow visualization and imaging techniques encounter some problems in high spatiotemporal resolution and high signal-to-noise ratio (SNR) measurements. Therefore, nanoparticle based planar laser scattering method (NPLS) is developed here. The nanoparticles are used as tracer, and pulse planar laser is used as light source in NPLS; by recording images of particles in flow field with CCD, high spatiotemporal resolution supersonic flow imaging is realized. The flow-following ability of nanoparticles in supersonic flows is studied according to multiphase flow theory and calibrating experiment of oblique shock wave. The laser scattering characteristics of nanoparticles are analyzed with light scattering theory. The results of theoretical and experimental studies show that the dynamic behavior and light scattering characteristics of nanoparticles highly enhance the spatiotemporal resolution and SNR of NPLS, with which the flow field involving shock wave, expansion, Mach disk, boundary layer, sliding-line, and mixing layer can be imaged clearly at high spatiotemporal resolution.

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Authors and Affiliations

  1. College of Aerospace and Material Engineering, National University of Defense Technology, Changsha, 410073, China

    YuXin Zhao, ShiHe Yi, LiFeng Tian & ZhongYu Cheng

Authors
  1. YuXin Zhao
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  2. ShiHe Yi
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  3. LiFeng Tian
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  4. ZhongYu Cheng
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Correspondence to YuXin Zhao.

Additional information

Supported by the National Natural Science Foundation of China (Grant No. 10672178)

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Zhao, Y., Yi, S., Tian, L. et al. Supersonic flow imaging via nanoparticles. Sci. China Ser. E-Technol. Sci. 52, 3640–3648 (2009). https://doi.org/10.1007/s11431-009-0281-3

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  • DOI: https://doi.org/10.1007/s11431-009-0281-3

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