Mechanics of Swirling Turbulent Pipe Flow PDF Download
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Author: James Davis Cresswell
Publisher:
ISBN:
Category : Pipe
Languages : en
Pages : 70
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Book Description
Author: James Davis Cresswell
Publisher:
ISBN:
Category : Pipe
Languages : en
Pages : 70
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Book Description
Author: Wiendelt Steenbergen
Publisher:
ISBN: 9789038604046
Category :
Languages : en
Pages : 187
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Book Description
Author: Akay Aydin Islek
Publisher:
ISBN:
Category : Axial flow
Languages : en
Pages :
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Book Description
The impact of swirl (i.e., flow with axial and azimuthal velocity components) on the turbulent flow in a pipe is studied using two-component laser-Doppler velocimetry (LDV). There are practical motivations for the flow geometry. For example, previous studies demonstrate that introducing swirl in the tube bank of a paper machine headbox can significantly increase mixing, and hence increase fiber dispersion and orientation isotropy in the finished paper product. The flow characteristics in a pipe downstream of a single straight tapered fin, a single fin with 180ʻ twist but otherwise identical geometry, and four twisted fins were therefore studied at a pipe-based Reynolds number of 80,000. Radial profiles of the mean and rms fluctuations of the streamwise and azimuthal velocity components are measured; results for the straight and twisted single fin are compared to determine the effects of fin geometry and swirl on the turbulent wake downstream of the fin. From a practical viewpoint, it is also desirable to have "adjustable" swirl, where swirl can either be turned "on" or "off" depending upon the type of paper product being produced. The next generation "swirler" concept consists of fins fabricated from two-way shape memory alloys. Using the two-way memory effect, the fins will be in their straight configuration when "cold" and twisted configuration (hence acting as a swirler) when "hot". This study is the initial phase in developing new active control mechanisms, known as the Vortigen concept, for increasing productivity, and hence reducing wasted raw material and energy, in the pulp and paper industry.
Author: Wolfgang Merzkirch
Publisher: Springer Science & Business Media
ISBN: 9783540222422
Category : Science
Languages : en
Pages : 280
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Book Description
Flow meters measure the volumetric flow rate in a pipeline. Most meters are based on deriving a signal from the fluid flow and calibrating the signal against the volumetric flow rate. The calibration is done in fully-developed flow, and the same state of flow must exist at the meter’s position when it is in practical use. Because the field of flow metering has been neglected by fluid mechanicists for a long time, this book addresses two major fluid mechanical problems in flow metering: the analysis of signal generation in turbulent pipe flow, which explains the function of the meter beyond a simple calibration, and the possible use of a meter in non-developed flows. These problems are investigated with reference to, and examples from, a variety of meters, e.g. ultrasound cross-correlation meters, vortex meters, and turbine meters. Studying these problems requires consideration of specific phenomena in turbulent non-developed pipe flow, as caused by installations, and finding special solutions with signal processing, both of which are included in the book.
Author: Wolfgang Merzkirch
Publisher: Springer Science & Business Media
ISBN: 3540267255
Category : Technology & Engineering
Languages : en
Pages : 261
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Book Description
Flow meters measure the volumetric flow rate in a pipeline. Most meters are based on deriving a signal from the fluid flow and calibrating the signal against the volumetric flow rate. The calibration is done in fully-developed flow, and the same state of flow must exist at the meter’s position when it is in practical use. Because the field of flow metering has been neglected by fluid mechanicists for a long time, this book addresses two major fluid mechanical problems in flow metering: the analysis of signal generation in turbulent pipe flow, which explains the function of the meter beyond a simple calibration, and the possible use of a meter in non-developed flows. These problems are investigated with reference to, and examples from, a variety of meters, e.g. ultrasound cross-correlation meters, vortex meters, and turbine meters. Studying these problems requires consideration of specific phenomena in turbulent non-developed pipe flow, as caused by installations, and finding special solutions with signal processing, both of which are included in the book.
Author: R. G. Backshall
Publisher:
ISBN:
Category : Axial flow
Languages : en
Pages : 6
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Author: Diamantis Kounadis
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: David W. Baker
Publisher:
ISBN:
Category : Flow meters
Languages : en
Pages : 300
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Book Description
Author:
Publisher:
ISBN:
Category : Combustion chambers
Languages : ka
Pages : 70
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Book Description
Author: L. W. Roberts
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
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Book Description
