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Experimental and Numerical Studies on Flow and Turbulence Characteristics of Impinging Stream Reactors with Dynamic Inlet Velocity Variation

Author

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  • Xueqing Liu

    (School of Energy and Power Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

  • Song Yue

    (Power Generation Branch, Powerchina Hubei Electric Engineering Corporation Limited, No.1 Xinqiaosi Road, Jinyinhu Street, Dongxihu District, Wuhan 430040, China)

  • Luyi Lu

    (School of Energy and Power Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

  • Wei Gao

    (School of Energy and Power Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

  • Jianlan Li

    (School of Energy and Power Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

Abstract

Impinging stream technique has been widely used in engineering industries. Insufficient data are available on the effects of dynamic inflow conditions on the flow and turbulence characteristics of an impinging stream reactor. In this study, we investigate and discuss the flow and turbulence characteristics of an impinging stream reactor with dynamic inlet velocity variation, e.g., sinusoidal, parabolic, step or triangular variation. The effects of period, amplitude, phase difference, mean inlet velocity and type of dynamic inlet velocity variation on the motional behaviors of the impinging surface and the mean turbulence kinetic energy ( k ) of the impingement region are investigated and discussed using particle image velocimetry (PIV) and computational fluid dynamics (CFD) at various values of L / D (the ratio of impinging spacing to nozzle diameter). The results show that the impinging surface makes back-and-forth motions in impinging stream reactors with dynamic inlet velocity variation. The mean k of the impingement region during one period is dominated by both the inlet velocity conditions and the geometric configuration. Dynamic inflow conditions bring more turbulence energy and pulsating characteristics to impinging zones over constant inlet velocity for an instantaneously moving impinging surface. Impinging stream reactors with dynamic inlet velocity variation provides more intense turbulence properties over conventional impinging stream reactors at the same mean inlet velocity. This work shows that the impinging streams with dynamic inlet velocity variation has strong potential for future relevant reactors and processes for engineering applications.

Suggested Citation

  • Xueqing Liu & Song Yue & Luyi Lu & Wei Gao & Jianlan Li, 2018. "Experimental and Numerical Studies on Flow and Turbulence Characteristics of Impinging Stream Reactors with Dynamic Inlet Velocity Variation," Energies, MDPI, vol. 11(7), pages 1-24, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:7:p:1717-:d:155533
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    Citations

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    Cited by:

    1. Ge Zhao & Wei Li & Jinsong Zhu, 2019. "A Numerical Investigation of the Influence of Geometric Parameters on the Performance of a Multi-Channel Confluent Water Supply," Energies, MDPI, vol. 12(22), pages 1-21, November.
    2. Xueqing Liu & Song Yue & Luyi Lu & Wei Gao & Jianlan Li, 2018. "Numerical Simulations of a Gas–Solid Two-Phase Impinging Stream Reactor with Dynamic Inlet Flow," Energies, MDPI, vol. 11(7), pages 1-24, July.
    3. Vadim Lemanov & Vladimir Lukashov & Konstantin Sharov, 2022. "Hydrogen Vortex Flow Impact on the Catalytic Wall," Energies, MDPI, vol. 16(1), pages 1-17, December.

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