Scientific Results

  • ID:
    publications-4887
  • Type:
    Article
  • Year:
    2024
  • Authors:
    Tang Y.; Shen L.; Wu J.; Zhang Y.; Cheng Y.; Xu Y.
  • Title:
    Numerical Simulation of Hydraulic Characteristics of Frame-type Current Meter Based on Dynamic Grid 6DOF Model and Prediction of Flow Measurement Rate Constant in Open Channel; [ε_x009f_ΊδΊ_x008e_ε_x008a_¨η½‘ζ Ό6DOF模ε_x009e_‹η_x009a_„框ζ_x009e_¶εΌ_x008f_流ι€_x009f_δ»ζ°΄ε_x008a_›η‰Ήζ€§]
  • Venue/Journal:
    Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
  • DOI:
    10.6041/j.issn.1000-1298.2024.09.032
  • Research type:
  • Water System:
  • Technical Focus:
  • Abstract:
    A six degrees of freedom rigid body dynamics coupled numerical simulation model under dynamic grid was established, and the passive rotation process of the propeller caused by water impacting the frame-type current meter was simulated. It was based on the Navier - Stokes equation for incompressible fluid flow and the SST k - u> turbulence model, combined with the VOF multiphase flow model. This was done to analyze the flow field characteristics and motion posture of the frame-type current meter in the open channel, while calibrating the multiplier constant K and friction coefficient C. In this way, this can analyze the influence of different positions of the current meter on the multiplier constant K and friction coefficient C. The results showed that the use of the dynamic grid 6D0F model can effectively simulate the flow state of the frame-type current meter in open channels, and the simulation results were highly reliable. By analyzing the fitting curves of rotational speed and flow velocity at different times, it can be concluded that the different positions of the current meter would affect the magnitude of the friction coefficient C of the current meter, and it had little effect on the multiplication constant K of the current meter. This achievement can provide theoretical basis and technical support for the construction of digital twin irrigation areas and the measurement of open channel water in irrigation areas. The research results can provide necessary references for further research on the optimization of frame-type current meter and the wear of current meters under different sediment flow conditions. Β© 2024 Chinese Society of Agricultural Machinery. All rights reserved.
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