Results 291 to 300 of about 15,310,679 (339)

The Secondary Flow About Struts and Airfoils

Journal of the Aeronautical Sciences, 1954
The flow about a strut when the approaching velocity varies in the spanwise direction has been examined theoretically and experimentally. The theory supposes that the fluid is inviscid and incompressible and that the flow is a small disturbance of the two-dimensional potential pattern appropriate to the profile.
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Secondary Flows in Axial Turbines—A Review

Annals of the New York Academy of Sciences, 2001
Abstract: An important problem that arises in the design and the performance of axial flow turbines is the understanding, analysis, prediction and control of secondary flows. Sieverding1 has given a review of secondary flow literature, covering up to 1985.
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Flow Visualization Evaluation of Secondary Flow in a Centrifugal Blood Pump

ASAIO Journal, 1993
To design a less hemolytic and more antithrombogenic centrifugal blood pump, secondary flow, i.e., vortex and turbulent flow, must be properly controlled. An irregular stream pattern is a cause of hemolysis, and good wash-out around the shaft minimizes thrombus formation. In this study, flow visualization methods were applied to evaluate secondary flow
I, Sakuma, Y, Fukui, Y, Ohara, K, Makinouchi, S, Takatani, Y, Nosé   +5 more
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On Transverse Secondary Flows in Wave Channels

Journal of Applied Mechanics, 1983
The viscous boundary layer analysis for the sidewalls of a wave tank is presented for the case of two-dimensional waves of small amplitude traveling along the channel length. The second-order transverse streaming motion induced in the interior of the channel by the sidewall layers is determined. The calculations extend the work of Mei and Liu [1] which
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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 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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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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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 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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Secondary flow induced by riblets

Journal of Fluid Mechanics, 1998
The effects of riblets on one wall of a channel bounding fully developed turbulent flow are investigated. Various perturbation elements including wires, fins and slots are modelled in order to understand the effects of riblets. It is found that widely spaced riblets, fins and wires create a substantial increase in turbulent activity just above ...
Goldstein, D. B., Tuan, T.-C.
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