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On the hydrodynamics of hydraulic machinery and flow control

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Abstract

Hydraulic machinery mainly includes turbine and pump, which is closely related to national economy and people’s livelihood involving aerospace industry, marine engineering, hydropower engineering, petroleum industry, chemical industry, mining industry, biomedical engineering, environmental engineering, agricultural water-soil engineering, etc.. The internal flow of hydraulic machinery is extremely complex, and its characteristics can be summarized as high Reynolds number, multi-scales, inhomogeneous and vortex-dominant unsteady turbulence which interact with the rotating dynamic boundary (rotor blade). Based on the analysis of the internal flow characteristics of hydraulic machinery, the author and his research team successively proposed a rotation correction model, a curvature corrected filter-based model, a scalable detached eddy simulation method, and a non-linear hybrid RANS/LES turbulence model to capture unsteady flow structures and then predict hydraulic performance and dynamic characteristics more accurately. According to the analysis on the internal flow, the corresponding flow control measures were put forward. It was verified by experiments that these methods could significantly improve the hydraulic performance, anti-cavitation performance and dynamic characteristics (pressure pulsation and vibration) of hydraulic machinery in a certain range of operating conditions. In addition, the mechanism how flow control measures influence internal flow was analyzed in depth, aiming at finding a feasible and effective way to improve hydraulic performance, anti-cavitation performance and dynamic characteristics of hydraulic machinery.

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Authors and Affiliations

  1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, 200072, China

    Hong-xun Chen  (陈红勋), Wei Zhang  (张伟), Bing Zhu  (朱兵), Rui Zhang  (张睿), Qun Wei  (魏群), Zheng-chuan Zhang  (张正川), Chao Liu  (刘超) & Jian-wu He  (何建武)

  2. Chinese Ship Scientific Research Center, Wuxi, 214082, China

    Zheng Ma  (马峥)

Authors
  1. Hong-xun Chen  (陈红勋)
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  2. Zheng Ma  (马峥)
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  3. Wei Zhang  (张伟)
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  4. Bing Zhu  (朱兵)
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  5. Rui Zhang  (张睿)
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  6. Qun Wei  (魏群)
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  7. Zheng-chuan Zhang  (张正川)
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  8. Chao Liu  (刘超)
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  9. Jian-wu He  (何建武)
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Corresponding author

Correspondence to Hong-xun Chen  (陈红勋).

Additional information

Project supported by the National Natural Science Foundation of China (Grant Nos. 51379120, 51179100).

Biography: Hong-xun Chen (1962-), Male, Ph. D., Professor

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Chen, Hx., Ma, Z., Zhang, W. et al. On the hydrodynamics of hydraulic machinery and flow control. J Hydrodyn 29, 782–789 (2017). https://doi.org/10.1016/S1001-6058(16)60789-8

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  • DOI: https://doi.org/10.1016/S1001-6058(16)60789-8

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