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Keywords: wake
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Proceedings Papers

Proc. ASME. FEDSM2020, Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation, V001T02A002, July 13–15, 2020
Paper No: FEDSM2020-20322
... measurements were carried out in the duct top by visualizing the flow downstream obstacles in order to study the 3D effects of the flow. PIV 2D numerical simulations (CVFEM) von Karman vortex wake coherent structures instabilities Γ 2 criterion EXPERIMENTAL AND NUMERICAL INVESTIGATIONS...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A087, July 28–August 1, 2019
Paper No: AJKFluids2019-5164
... to be 0.1 ≤ M ≤ 0.5 by using the low-pressure wind tunnel. From the schlieren visualization, frequency of the vortex shedding was obtained by performing frequency analysis on the time series schlieren images. Near wake structure by the circular cylinder is measured by time-averaged schlieren image. Even...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A042, July 28–August 1, 2019
Paper No: AJKFluids2019-4971
... cylinders, such as the stagnant bubbly flow and the bubbly wake. microbubble plume cylinders in tandem separated shear layer wake flow visualization FLOW PAST TWO CYLINDERS ARRANGED IN TANDEM WITHIN A MICROBUBBLE PLUME Tomomi Uchiyama Nagoya University Nagoya, Japan Ryota Kano Brother...
Proceedings Papers

Proc. ASME. FEDSM2009, Volume 1: Symposia, Parts A, B and C, 1655-1662, August 2–6, 2009
Paper No: FEDSM2009-78189
... 30 07 2010 An experimental investigation was carried out to study the unsteady flow field behind a sinusoidally pitching airfoil at reduced frequencies 0.091, 0.182 and 0.273. Streamwise instantaneous velocity and streamwise mean velocity in the wake were measured by hot-wire...
Proceedings Papers

Proc. ASME. FEDSM2009, Volume 1: Symposia, Parts A, B and C, 2285-2293, August 2–6, 2009
Paper No: FEDSM2009-78483
... coefficient increased and for further increase of the vent ratio diameter, the drag coefficient decreased, but the general variation of drag coefficient was the same as of same parachute with no vent. Parachute Wake Vent Drag coefficient Turbulent CFD Analysis 1 Copyright © 2009 by ASME...
Proceedings Papers

Proc. ASME. FEDSM2009, Volume 1: Symposia, Parts A, B and C, 1399-1407, August 2–6, 2009
Paper No: FEDSM2009-78272
... the turbulent flow around the cube since this method is more accurate to model time-depended flows than other numerical methods. When the air as an ideal fluid flows over the cube, flow separate from the back of the body and unsteady vortices appears, causing a large wake behind the cube. The Near-Wake (wake...
Proceedings Papers

Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 1069-1076, July 30–August 2, 2007
Paper No: FEDSM2007-37077
... 26 03 2009 Disturbance growth in the wake of a circular cylinder moving at a constant acceleration is examined experimentally. The cylinder is installed on a carriage moving in the still air. The results show that the critical Reynolds number for the onset of the global instability...
Proceedings Papers

Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 1873-1882, July 30–August 2, 2007
Paper No: FEDSM2007-37440
... 26 03 2009 A series of experiments were carried out to study the unsteady wakes behind an oscillating airfoil. The airfoil is a section of a wind turbine blade oscillating in pitch about the quarter chord axis at various reduced frequencies, oscillation amplitude and mean angles...
Topics: Airfoils, Wakes
Proceedings Papers

Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 1171-1178, July 30–August 2, 2007
Paper No: FEDSM2007-37222
.... An unsteady airfoil in pitching and heaving motions forms thrust producing vortex streets with vortices accompanied with large vorticities, without disturbing flow around an airfoil, comparing to airfoils with independent pitching and heaving motions. In the wake of an unsteady airfoil in pitching and heaving...
Topics: Airfoils, Thrust
Proceedings Papers

Proc. ASME. FEDSM2002, Volume 2: Symposia and General Papers, Parts A and B, 147-154, July 14–18, 2002
Paper No: FEDSM2002-31166
... The study of the recovery of an open channel boundary flow in the presence of increased freestream turbulence ( FST ) generated in the wake region of a surface mounted flat plate is presented. Detailed LDA velocity measurements were obtained upstream and downstream of the flat plate, which is 3...
Proceedings Papers

Proc. ASME. FEDSM2003, Volume 2: Symposia, Parts A, B, and C, 811-817, July 6–10, 2003
Paper No: FEDSM2003-45081
... depth value was found to be insignificant. Flow field solutions of velocity vectors, trace lines, pressure, and turbulence intensity have also been obtained, and some are used to show how the changes of dimple depth, dimple diameter, as well as the ball backspin motion, will affect the wake formation...
Proceedings Papers

Proc. ASME. FEDSM2006, Volume 2: Fora, 893-901, July 17–20, 2006
Paper No: FEDSM2006-98008
... 08 09 2008 Swirl with bluff body wake in jets finds application in gas turbine engines, turbo machinery etc. to strengthen the recirculation region, improve combustion efficiency, enhance flame stabilization, improve fuel air mixing and blow off limits and lower pollutant formation...
Topics: Jets, Wakes
Proceedings Papers

Proc. ASME. FEDSM2006, Volume 2: Fora, 737-742, July 17–20, 2006
Paper No: FEDSM2006-98487
... and π is much larger than that on pitching and heaving airfoils. However, the maximum thrust efficiency of a combination airfoil at φ = π/2 was approximately 0.42 and was slightly higher than that on a pitching airfoil. Airfoil Wake Vortex Thrust Visualization PIV be ai an in dy m H ai hi...