Wei Feng’s scientific contributions

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Publications (1)


Schematic diagram of the three SCPs.
Computational domain and boundary conditions.
Schematic diagram of the dynamic computational domain method.
Results of grid generation.
Comparison the cavity sizes with various grid densities.

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Numerical–experimental study on the stability mechanism of tail slapping motion of supercavitation projectile
  • Article
  • Full-text available

February 2024

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213 Reads

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8 Citations

Rushi Liu

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Wei Feng

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Hui Zhang

Tail slapping is considered to be a prominent mode for facilitating the movement of supercavitating projectiles underwater. Stability mechanism of the tail slapping and stability criterion of projectiles was numerically investigated in this paper. A numerical method was conducted to calculate the free flight of projectiles by combining the finite volume method, the mixture multiphase model, and a dynamic meshing scheme. The accuracy and applicability of the numerical calculation method are verified by experiments. Three typical stability modes of tail slapping motion, namely, stable, conditionally stable, and unstable, were identified through the free flight numerical simulations of projectiles with varying length-to-diameter ratios under different initial angular velocities. The stability criterion of projectiles was proposed, indicating that the tail slapping stability can be determined by analyzing the curve of the moment variation with the angle of attack at any velocity above 200 m/s. Furthermore, it was found that the stable projectiles possess inherent motion states that are exclusively determined by their structural features and are unaffected by the initial motion conditions.

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Citations (1)


... Unlike high-velocity projectile experiments, water tunnel experiments provide detailed insights into cavitation at lower velocities, which are convenient for studying cavitation mechanisms. 18 Foeth et al. 19 investigated the three-dimensional (3D) hydrofoil sheet cavitation in a water tunnel by employing the time-resolved particle image velocity measurement (PIV) method, confirming the significant influence of the 3D geometry of the hydrofoil on the flow dynamics and stability of the cavitation pattern. Since the equipment severely limited the flow velocity in experimental water tunnels, it was challenging to achieve natural supercavitation. ...

Reference:

The rotational effects on the cavitation process for a cylinder vehicle
Numerical–experimental study on the stability mechanism of tail slapping motion of supercavitation projectile