Results 221 to 230 of about 1,385,615 (259)

Method of Calculating Secondary Flow

Water Resources Research, 1971
Secondary flow plays an important role in a number of areas in hydraulics, such as sediment transport, distribution of primary flow velocity and boundary shear, flow resistance, and stream meandering. In this study, secondary currents generated in a straight, triangular open channel are investigated and used to develop a method of calculating secondary
Chao‐Lin Chiu, Teh‐Shee Lee
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Secondary Flows and Losses in Axial Flow Turbines

Journal of Engineering for Power, 1982
A simple approach to the estimation of angle variation and losses produced by the secondary flows near the hub and casing of a turbine is presented. The angle variation is predicted by ‘classical’ secondary flow theory, and the loss by estimating three components of the loss and adding them together.
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The secondary instability in Goertler flow

Physics of Fluids A: Fluid Dynamics, 1991
The ‘‘high-frequency’’ secondary instability of nonlinearity developed and strongly modified Goertler vortices is numerically studied by considering two kinds of secondary instability modes, i.e., sinuous modes and varicose modes. A spectral collocation method with Chebyshev polynomials is used for calculations. It is found that secondary instabilities
Yu, Xiuyang, Liu, J. T. C.
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Secondary Flows in Cascades of Twisted Blades

Journal of the Aeronautical Sciences, 1955
Squire and Winter's definitive paper on secondary flow treats the situation of a nonuniform velocity profile through a cascade of blades whose properties—i.e., geometry—are uniform with height. The analysis focuses on the flow in a single passageway between blades.
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Secondary Flows in Pipes

1966
In Lecture 10 we have seen that steady rectilinear flow down a straight pipe is possible for a general incompressible fluid only for certain exceptional cross-sections, and for all cross-sections only for certain exceptional fluids. Both the Navier-Stokes fluid and the fluid of second grade are exceptional in this sense, since their viscometric ...
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The Secondary Flow around an Oscillating Circular Cylinder in a Uniform Flow

Journal of the Physical Society of Japan, 1999
Summary: The secondary flow around an oscillating circular cylinder in a uniform flow is investigated with the successive approximation of Navier-Stokes equations for low Reynolds numbers. The approximation is based on the Oseen's equations, and the equations and solution are expanded in power series in Reynolds number.
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Secondary Flow in Rotating Bends

Journal of Engineering for Power, 1978
An equation describing the development of streamwise vorticity is derived. The fluid is assumed inviscid and incompressible and to have a gradient of rotating total pressure across the streamtube. The equation is used to calculate, by finite difference techniques, the streamwise vorticity development for bends, rotating straight pipes, rotating axial ...
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Secondary Flow in Noncircular Conduits

Journal of the Hydraulics Division, 1978
A requirement for calculating an accurate velocity distribution in noncircular conduits is a knowledge of the secondary flow distribution in these conduits. The cause of these secondary flows is considered in this paper and a simple momentum transfer model for Reynolds stresses is used to effect a solution for the secondary flow in a square duct.
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Flow Visualization Study of Secondary Flow in a Corner.

1979
Abstract : An experimental investigation has been made of secondary flow in a 90 degree corner. The tests were run in a water tunnel at low speed (approximately 0.3 ft. per sec.) with emphasis on an attempt to visualize the embedded vortices in the laminar flow. The Reynolds number range was 11,000 to 52,500 per foot; the corner model was 9.75 in. wide
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Secondary flow in a cascade of airfoils

1959
Secondary flows were studied experimentally in a diffusing cascade. A family of screens were installed ahead of the blade row at the midspan position to produce a controlled distortion of the up-stream velocity profile. In this way it was possible to focus attention on those regions of the flow field which were distant from the tunnel walls and to ...
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