Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Underwater bionic rudder wing design and its hydrodynamic performance research
| DOI: | 10.11809/bqzbgcxb2025.02.019 |
| Keywords: | bionic hydrofoil; lift increase and drag reduction; flow separation; wingtip vortices |
| Abstract: | In order to enhance the hydrodynamic performance of the hydrofoil, a new bionic hydrofoil model is designed by adopting the humpback whale fin limb leading edge wavy structure as a design reference, expressing the leading edge profile through a function model, and combining with a new wing profile. The hydrodynamic performance of the bionic hydrofoil and the typical hydrofoil is measured through the water tunnel test, and the numerical simulation method is used to reveal the mechanism of the bionic hydrofoil’s lift and drag reduction. The test results show that in the Reynolds number range of 1.8×105 to 3.0×105, the bionic hydrofoil shows more obvious advantages of lift and drag reduction, in which the lift performance is increased by 14% at maximum and the drag performance is optimized by 47% at maximum. Further in depth analysis of the numerical results and comparison of the surface pressure and flow field structure visualization show that: compared with a typical hydrofoil, the low pressure peak on the suction surface of the biomimetic hydrofoil is higher, and the high momentum region maintained by the leading edge wave structure significantly reduces the flow separation area. In addition, the optimization of the leading edge profile reduces the induced drag caused by the wingtip vortices, which significantly improves the hydrodynamic performance of the hydrofoil. |
| Issue: | Vol. 46 No. 2 (2025) |
| Published: | 2025-02-28 |