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Monday, August 3, 2020 | History

2 edition of Swirling pipe flow with axial switch found in the catalog.

Swirling pipe flow with axial switch

Arnold F. Moene

Swirling pipe flow with axial switch

experiment and large eddy simulation.

by Arnold F. Moene

  • 198 Want to read
  • 30 Currently reading

Published by Technische Universiteit Eindhoven in EIndhoven .
Written in English


The Physical Object
Pagination237p. : Paperback
Number of Pages237
ID Numbers
Open LibraryOL16312579M
ISBN 109038616953

axial inlet was determined by measuring the pressure drop at the tube bundle flow straightener. A predetermined calibration curve, obtained using pure axial flow and the vortex flowmeter, was used to correlate the pressure drop with the flowrate. This method is simple, yet effective, and it avoided extra pipe setting and a second flowmeter.   (1). I must say that the near field of tangential inlet flow will be different from that of the pure axial inlet flow. (2). But the size and extend of the region will depend on the tangential velocity, the mass flow rate (which determine the axial velocity), the viscosity, the size of the pipe.

Numerical and experimental study of an axially induced swirling pipe flow Article in International Journal of Heat and Fluid Flow March with Reads How we measure 'reads'. Investigation of the turbulent swirl flow in pipe generated by axial fans using PIV and LDA methodsCited by: 1.

  Plotting swirl momemtum ratio vs pipe diameters, I got swirl ratios of and for MS smooth and rough pipe at 15 pipe diameters downstream of the swirl source. MS Beta values for decay of axial velocity profile offset(or skew) downstream of a single 90 degree bend was somewhat greater than to reduce an initial offset of to. A doublet swirl vanes influence air flow in both axial and radial direction. The CFD analysis has been performed in a doublet swirl vanes under a subsonic speed. The objective of this paper is to increase the vortices around the swirl vanes by changing the area, angle of swirl vanes and increasing the swirl : R G Bhuvana, Sowmya A Srinivasan, D Thanikaivel Murugan.


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Swirling pipe flow with axial switch by Arnold F. Moene Download PDF EPUB FB2

Abstract. Swirling flow in combination with deformation still forms a major test case for many turbulence models. In order to better understand the relevant processes in such flows and to provide quantitative data for model validation, laboratory and numerical experiments are by: 1.

Swirling pipe flow with axial strain: experiment and large eddy simulation Citation for published version (APA): Moene, A. Swirling pipe flow with axial strain: experiment and large eddy by: The first flow is a fully developed rotating pipe flow (Imao, Itoh and Harada, ).

This flow was used for model development; however, a pipe flow with various axial rotating rates is still a critical test case for the model. The second flow is a more complex swirling flow with recirculation and separation (Roback and Johnson, ), which is File Size: 1MB.

A vertical pipe system with 11 m long and 62 mm inner diameter was carried out to investigate axial development of flow pattern, void fraction and pressure drop in the annular flow with and without swirl.

The experimental results show that a swirling annular flow with swirling streak and less disturbed waves is observed downstream of the : Wen Liu, Xiaofei Lv, Bofeng Bai. the turbulent rotating pipe flow and the swirling jet. The turbulent pipe flow has been investigated at the outlet of the pipe both by hot-wire anemometry and Laser Doppler Velocimetry (LDV).

The LDV has also been used to measure the axial velocity component inside the pipe. The research presents the effects of the rotation and Reynolds number. The empirical correlations for the above quantities are derived, and by using these empirical correlations, the decay process and pressure distributions along the pipe for the swirling flow can be successfully computed by giving discharge velocity and a wall static pressure at any axial Cited by: A variational analysis of flow-reversal condition in a turbulent swirling pipe flow using the bulk- helicity concept Phys.

Flu (); / Numerical and experimental study of an axially induced swirling pipe flow. International Journal of Heat and Fluid Flow53, DOI: /fluidflow Shi-ying Shi, Jing-yu Xu.

Flow field of continuous phase in a vane-type pipe oil–water separator. Experimental Thermal and Fluid Science60, DOI: 10 Cited by: Abstract. An experimental study of swirling turbulent flow through a curved bend and its downstream tangent has been carried out.

This study reports on the recovery from swirl and bend curvature and relies on measurements obtained in the downstream tangent and data reported in Part 1 to assess the by: The swirling flow is regarded as a fully developed pipe flow with mean axial velocity U m, which is in solid body rotation at an angular velocity ω, hence W ̄ =ωr until very close to the wall.

In the “wall layer”, the circumferential velocity is 1/2 by:   Abstract. DNSs of pipe flow with two different swirl strengths (S 1 and S 2) are carried flow is driven by an axial pressure gradient sufficient to keep a constant bulk Reynolds number Re b = U b D/ν = U p = 2U b is the centerline velocity of the corresponding laminar flow.

A body force in tangential direction is setting up a swirl in the Author: F. Nygård, H. Andersson. Swirling pipe flow due to pipe rotation has been reported numerous times in the past, e.g. by DNS in [5] or by experiments in [2]. In the present case, a pressure gradient in the azimuthal direction is setting up a swirl in the near wall : Frode Nygård, Helge I.

Andersson. Clamp-on laboratory results are presented for water in unperforated 2-inch pipes (1D≈51 mm) and for air in inch (mm ID) steel pipe containing one hole for the measurement of swirl or circulation, a second hole for cross flow and a third hole for axial flow.

As a matter of fact, the flow features in the C-shaped discharge passage of an ordinary vertical axial-flow pumping system are similar to that of "the swirling turbulent flow through a pipe.

Swirl Flows. Ashwani K. Gupta acoustic aerodynamic AIAA annular axial velocity axisymmetric Beer boundary layer Chigier combustion chamber Combustion Inst combustion Reynolds number rotation shown in Fig stratified charge engines swirl burner swirl number swirl vane swirl velocity swirling flow swirling jet Symposium Int Syred.

An experimental study of a swirling turbulent flow through a curved pipe with a pipe-to-mean-bend radius ratio of and a flow Reynolds number based on pipe diameter and mean bulk velocity of 50, has been carried out.

A rotating section, six pipe diameters long, is set up at six diameters upstream of the curved bend entrance. The rotating section is Cited by: 1. Introduction. Swirl flows have many important engineering applications such as the cyclone for separation of solid, liquid, and gas, swirl atomizers, swirl combustion devices, heat transfer enhancement, and others.In most of these devices, swirl flow transport in a straight pipe is the most commonly by: In particular, the three dimensional flow field at the exit of the curved pipe is documented for non-swirling and swirling flow conditions, with the latter being generated through a unique axially.

The vortex breakdown of a swirling jet flow entering a finite-length pipe is studied in this thesis. The theories of Rusak and co-authors which provide fundamental tools to predict the first occurrence of breakdown and simulate the flow behavior are applied.

To demonstrate the ideas, the detailed experimental data of Novak and Sarpkaya () are used, specifically, the upstream (inlet) axial Author: Obdulio Ochoa. I have same problem. I'm attempting to simulate a swirling compressible air flow in a pipe (diameter 39mm, lenght 60mm) with a combination of tangential inlet (4 square pipes, 10mm) and axial inlet (circular hole in the pipe end, diameter 12mm).

Axial solids volume fraction distributions from nonswirling flows with estimated concentrations of % (a and c) and % (d), and a swirling flow with a concentration of % (b and e).

The water flow velocities in all cases are m/s (Wang et al., ).Swirling flow was introduced into the test section via a rotating tube bundle, which yielded solid body rotation of the flow at the inlet. It was found that the evolution characteristics brought out a dominant effect of swirl with a solid body rotation.

It was the aim of the authors to obtain “bench-mark” measurements from their by: circuit, axial flow pump test rig shown diagrammatically in figure 1. The rig is located in the Hydraulics Laboratory of the University of Technology, Sydney. The axial flow pump, which is single-stage, is of an industry-size ( mm pipe diameter) designed by Ornel Pumps, based on the work of O'Brien and.