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- W2361569758 abstract "Tests were conducted in water tunnel for the turbulent boundary flow and its noise of a hydrofoil and a half-hydrofoil. Measurements were made for the fluctuating velocities of the hydrofoils and its noise relating to various free flows, attack angles and different roughness of the foil-surfaces. It was found that flow velocity, attack angle and roughness of the surface all have obvious effects on the turbulent flow and its noise. The turbulent intensity of 15° attack angle was much larger than that of 0° attack angle, and the turbulent intensity of rough surface was larger than that of smooth surface. The turbulent intensity was nearly independent of the free flow velocity,and the magnitude of the u-wise and v-wise turbulent intensity were of the same order. Generally, the noise of the turbulent boundary layer of the hydrofoil was more intensive for the cases with higher velocity, larger attack angle and rougher surface. From the measuring results of both fluctuating velocity and its noise, we can deduced that the noise source intensity could be qualitatively observed by the turbulent intensity though it is known theoretically that the noise source intensity is determined by the second time derivative of the fluctuating velocity." @default.
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- W2361569758 date "2001-01-01" @default.
- W2361569758 modified "2023-09-23" @default.
- W2361569758 title "An Experimental Study on the Turbulent Boundary Layer Flow Field and Its Noise" @default.
- W2361569758 hasPublicationYear "2001" @default.
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