水力学および音響性能のための3次元リブレット表面の多目的最適化
Zixiao Wei1, Zilan Zhang1, Dahyun Daniel Lim1
1Mechanical Engineering, University of California Berkeley, 1112 Etcheverry Hall, Berkeley, California, 94720, UNITED STATES.
Bioinspiration & biomimetics
|September 2, 2025
まとめ
この研究はサメの皮膚に触発された新しい3Dリブレット表面設計を紹介しています. 最適化された地形は,水中でのアプリケーションの効率と音響のステルス性を高め,ドラッグとフローのノイズを軽減します.
科学分野:
- バイオインスピレーションエンジニアリング
- 流体力学
- 音響学
背景:
- サメの皮膚の歯は 摩擦力を減らすために リブレットに刺激を与えます
- 3Dトポグラフィは未探査のまま,以前の研究は2Dリブレットに焦点を当てていた.
- 複雑で3Dのデンティクルに触発された表面は パラメータ化,シミュレーション,製造に挑戦します
研究 の 目的:
- 3Dでリブレット強化された表面のトポグラフィを導入します.
- 抵抗を軽減し,フロー誘発のノイズを抑制します.
- 牽引式配列ソナーアプリケーションのためのスケーラブルなソリューションを提供します.
主な方法:
- ベイジアン最適化と計算流体力学 (CFD) を利用した.
- 新しい3Dリブレット強化表面地形を開発し分析した.
- 壁の近くの渦の動態を理解するためにフローフィールド分析を行った.
主要な成果:
- 最適な設計により,音圧レベルは6.87dB,抵抗は0.34%低下しました.
- 最大の騒音削減は8.81dBで,わずかな抵抗が増加しました.
- 最大抵抗の減少は5. 18%で,騒音の抑制が顕著でした.
結論:
- CFDシミュレーションとベイジアン最適化は 3Dリブレット表面を効率的に精製します.
- 開発された地形は,騒音軽減と水力学的性能のバランスをとります.
- このバイオインスピレーションによるデザインは 音響の隠蔽と水中での効率を 改善します
関連する概念動画
Turbulent Flow: Problem Solving
183
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
183
Hydrostatic Pressure Force on a Curved Surface
2.0K
Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
2.0K
Response Surface Methodology
263
Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:
The process of RSM involves several key steps:
263
Laminar Flow: Problem Solving
250
Laminar flow occurs when a fluid moves smoothly in parallel layers with minimal mixing and turbulence. In fluid mechanics, ensuring laminar flow within a pipe is essential for precise control of flow characteristics, especially in engineering applications. The key factor in determining whether flow remains laminar is the Reynolds number, a dimensionless quantity that depends on the fluid's velocity, density, viscosity, and the pipe's diameter. A Reynolds number of 2100 or lower...
250
Hydrostatic Pressure Force on a Plane Surface
539
When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...
539
Fluid Pressure over Curved Plate of Constant Width
1.7K
When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
1.7K


