PROBLEM TO BE SOLVED: To provide a frictional resistance reducing method for reducing frictional resistance of an object (structure) such as hull, a structure with reduced frictional resistance and a method for forming electrodes for reducing frictional resistance of which direct actions against turbulent boundary layer, for example, a viscosity bottom layer and a buffer area near a surface of hull, for example, realize a local high void ratio or volume concentration of particles, and restrict turbulent flow.SOLUTION: Electrodes 20 are formed at a surface of an object 11 to reduce frictional resistance caused by fluid X, particles and/or air bubbles generated by electrolysis action under application of electrical power to the electrodes 20 are acted from the surface of the object 11 that is an inner wall surface of a turbulent flow interface layer to reduce frictional resistance at the object 11 caused by fluid X.SELECTED DRAWING: Figure 1
【課題】乱流境界層のなかでも、例えば船体の表面近くの領域である粘性底層とバッファー域に直接作用することにより、局所的に高いボイド率あるいは粒子の体積濃度を実現し、乱流を抑制し、船体等の対象物(構造物)の摩擦抵抗を低減させる摩擦抵抗低減方法、摩擦抵抗を低減した構造物、及び摩擦抵抗低減用の電極形成方法を提供すること。【解決手段】流体Xによる摩擦抵抗の低減を図る対象物11の表面に電極20を形成し、電極20に電力を印加することによる電気分解作用により発生する粒子及び/又は気泡を乱流境界層の内部の壁面である対象物11の表面から作用させることによって、対象物11の流体Xによる摩擦抵抗を低減する。【選択図】図1
FRICTIONAL RESISTANCE REDUCING METHOD, STRUCTURE WITH REDUCED FRICTIONAL RESISTANCE AND METHOD FOR FORMING ELECTRODES FOR REDUCING FRICTIONAL RESISTANCE
摩擦抵抗低減方法、摩擦抵抗を低減した構造物、及び摩擦抵抗低減用の電極形成方法
2017-06-01
Patent
Electronic Resource
Japanese
IPC: | F15D FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS , Strömungsdynamik, d.h. Verfahren oder Vorrichtungen zum Beeinflussen der Strömung von Gasen oder Flüssigkeiten / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F16L PIPES , Rohre / F17D Rohrleitungssysteme , PIPE-LINE SYSTEMS |
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