Results 301 to 310 of about 950,297 (340)
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Turbulent intensity and Reynolds number effects on an airfoil at low Reynolds numbers
Physics of Fluids, 2014This work investigates the aerodynamics of a NACA 0012 airfoil at the chord-based Reynolds numbers (Rec) from 5.3 × 103 to 2.0 × 104. The lift and drag coefficients, CL and CD, of the airfoil, along with the flow structure, were measured as the turbulent intensity Tu of oncoming flow varies from 0.6% to 6.0%.
Wang, S, Zhou, Y, Alam, MM, Yang, HX
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2018
D4 Reynolds Number Corrections We explain why the ratio of inertia to friction forces, as characterized by the Reynolds number, influence gas turbine performance. We describe how the use of the Reynolds Number Index can simplify performance calculations. How to correlate Reynolds number corrections to real data is illustrated through use of a pipe flow
Joachim Kurzke, Ian Halliwell
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D4 Reynolds Number Corrections We explain why the ratio of inertia to friction forces, as characterized by the Reynolds number, influence gas turbine performance. We describe how the use of the Reynolds Number Index can simplify performance calculations. How to correlate Reynolds number corrections to real data is illustrated through use of a pipe flow
Joachim Kurzke, Ian Halliwell
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AIP Conference Proceedings, 2019
This article proposes a definition of the Reynolds number in a form, which is applicable point-wise to an entire volume of fluid. This dimensionless number is termed a local Reynolds number in the article. In the article a few examples of the local Reynolds number distribution are shown using CFD.
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This article proposes a definition of the Reynolds number in a form, which is applicable point-wise to an entire volume of fluid. This dimensionless number is termed a local Reynolds number in the article. In the article a few examples of the local Reynolds number distribution are shown using CFD.
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2009
Newton’s second law of motion stipulates that the rate of change of momentum of a fluid parcel must be balanced by the body force exerted over the parcel volume and by the surface force exerted on the parcel boundary. Under certain conditions, the rate of change of momentum of the parcel is small compared to the body and surface force, and can be ...
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Newton’s second law of motion stipulates that the rate of change of momentum of a fluid parcel must be balanced by the body force exerted over the parcel volume and by the surface force exerted on the parcel boundary. Under certain conditions, the rate of change of momentum of the parcel is small compared to the body and surface force, and can be ...
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Reynolds-Zahl Re (Reynolds number Re)
2000Es handelt sich urn eine dimensionslose Kennzahl im Sinne der Dimensionsanalysis. Als solche tritt sie formal bei der Entdimensionierung der Impulsgleichung (Kraftegleichgewicht an einem Fluidelement) auf. Wegen der Kopplung der Impulsgleichung mit der Thermischen Energiegleichung uber die sog.
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Reynolds Number Effect on Regenerative Pump Performance in Low Reynolds Number Range
International Journal of Fluid Machinery and Systems, 2008The effect of Reynolds number on the performance of a regenerative pump was examined in a low Reynolds number range in experiment. The head of the regenerative pump increased at low flow rates and decreased at high flow rates as the Reynolds number decreased.
Yoshinobu Tsujimoto +4 more
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2009
Having discussed viscous flow at low Reynolds numbers in Chapter 9, now we turn our attention to the diametrically opposite limit of inertia-dominated flow at high Reynolds numbers. Inspecting the changes in the structure of a flow with increasing Reynolds number, we encounter a rich phenomenology and a variety of transition protocols.
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Having discussed viscous flow at low Reynolds numbers in Chapter 9, now we turn our attention to the diametrically opposite limit of inertia-dominated flow at high Reynolds numbers. Inspecting the changes in the structure of a flow with increasing Reynolds number, we encounter a rich phenomenology and a variety of transition protocols.
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Flows at Moderate Reynolds Numbers
2001Abstract This chapter presents the application of LBE to flows at moderate Reynolds numbers, typically hundreds to thousands. This is an important area of theoretical and applied fluid mechanics, one that relates, for instance, to the onset of nonlinear instabilities and their effects on the transport properties of the unsteady flow ...
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High Reynolds Number Turbulence
2007Abstract : The objectives of the grant are to provide a systematic study to fill the gap between existing research on low Reynolds number turbulent flows to the kinds of turbulent flows encountered on full-scale vehicles. We are specifically interested in (1) the behavior of wakes at high Reynolds numbers with increasing complexity, varying from ...
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Some Comments on Reynolds Number
Journal of Engineering for Power, 1964The physical laws that govern fluid motions are examined to gain justification for the grouping of physical variables that we call Reynolds number. First, a perfect incompressible viscous fluid is considered, and it is shown that Reynolds number is the only flow parameter of its kind upon which the performance of a turbomachine can depend.
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