Results 21 to 30 of about 12,197 (302)
Study of aeration efficiency at stepped channels [PDF]
Water Management, 2003 The oxygen concentration in surface waters is a prime indicator of the quality of that water for human use as well as use by the aquatic biota. Hydraulic structures can increase dissolved oxygen levels by creating turbulent conditions where small air bubbles are carried into the bulk of the flow. Stepped channels are a particular instance of this, and
A. Baylar, M. E. Emiroglu
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AERATED FLOW CHARACTERISTICS ON STEPPED CHANNELS
PROCEEDINGS OF HYDRAULIC ENGINEERING, 2005 Stepped channels are effective for dissipating the energy of supercritical flows that occur at steep channels, dams, weirs, and drop structures. As stepped channel flows are characterized as aerated flows, it is important to estimate the energyh ead of the aerated flow for a hydraulic design of the stepped channel.
TAKAHASHI, Masayuki +2 more
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Characteristics of Regular Pulse Bursts Generated From Lightning Discharges
Frontiers in Environmental Science, 2021 In this work, we studied the waveforms of all lightning discharges from about 15 min. Eighty-three percent of all lightning discharges contain particular waveforms called regular pulse bursts (RPBs), which have regular microsecond-scale electric or ...
Wang Yanhui +7 more
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History of stepped channels and spillways: a rediscovery of the “wheel” [PDF]
Canadian Journal of Civil Engineering, 1995 Recently, spillways with a stepped profile have regained interest and favor among design engineers to pass flood waters over the dams. The stepped geometry enhances the energy dissipation above the spillway and reduces the size of a downstream stilling basin.
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Nappe Flow Surges down a Rough-Stepped Sloping Channel [PDF]
, 2017 Nappe flow applies to small discharges, and investigation of nappe flow surges helps to understand the mechanism of water flow in stepped open channels.
Xiekang Wang +7 more
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Discharge coefficient of flow over Al-Shalalat stepped weir on Al-Khusr River
Applied Water Science, 2021 Many hydraulic structures are constructed in an open channel according to the purposes and the nature of the region. Weir is one of these structures which is used for discharge measurements as well as rising water depth in irrigation channels.
Azza N. Altalib
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Aircraft observations of a lightning channel in STEPS [PDF]
Geophysical Research Letters, 2003 We analyze a portion of an intracloud lightning channel that was captured on video by an instrumented aircraft and mapped three‐dimensionally by a ground‐based lightning mapping array (LMA). By comparing the electric fields measured on the aircraft with a model which simulates the electrostatic field present after charge was effectively deposited by ...
Tom A. Warner +2 more
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Optimal Design and Analysis of the Cooled Turbine Blade in Gas Turbines with CFD [PDF]
Journal of Applied Fluid MechanicsIn this study, the effects of the structural geometries of the channels used for cooling blades in the heated regions of the gas turbine exposed to high temperature were investigated.
E. Yildiz, F. Koca, I. Can
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Energy Loss in Steep Open Channels with Step-Pools [PDF]
Water, 2020 Three-dimensional numerical simulations were performed for different flow rates and various geometrical parameters of step-pools in steep open channels to gain insight into the occurrence of energy loss and its dependence on the flow structure. For a given channel with step-pools, energy loss varied only marginally with increasing flow rate in the ...
Suresh Kumar Thappeta +4 more
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Microstrip three-port 4-channel multiplexers using dual-band bandpass filters for wireless applications [PDF]
, 2008 This paper presents a compact microstrip three-port 4-channel multiplexer using dual-band bandpass filters with good transmission and reflection characteristics on each channel.
Budimir, D. +3 more
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