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Keywords: wind tunnels
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Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2011, 133(12): 121402.
Published Online: December 23, 2011
... CFD simulations and physical experiments, has been used to design a quasi-two dimensional closed-circuit wind tunnel model for a VE. Passive control and active flow control have proven to be essential in producing desired flow characteristics for the system. Design and characterization of the vent...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2011, 133(12): 121102.
Published Online: December 19, 2011
... assembly significantly. This work quantifies the impact of these design features on the vibration amplitude, develops a methodology for testing mirror vibrations in a small, low-speed wind tunnel using only the mirror of interest, and delves into the interactions between the bluff body mirror geometry and...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. September 2011, 133(9): 094502.
Published Online: September 8, 2011
...Jack E. Abboud; Wafaa S. Karaki; Ghanem F. Oweis The flow field past a biologically inspired cylindrical model with a cactus-shaped cross section is investigated in a wind tunnel using particle image velocimetry and surface pressure measurements at a biologically relevant Reynolds number of ∼ 2...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. August 2011, 133(8): 081101.
Published Online: August 16, 2011
...Michael Bishop; Serhiy Yarusevych The effect of wall streamlining on flow development over a circular cylinder was investigated experimentally in an adaptive-wall wind tunnel. Experiments were carried out for a Reynolds number of 57,000 and three blockage ratios of 5%, 8%, and 17%. Three test...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. May 2011, 133(5): 051101.
Published Online: May 31, 2011
... performance and the flow condition of the cross-flow rotor, a casing suitable for this sort of prevailing wind conditions is designed in this research and the effect of the casing is investigated by experimental and numerical analysis. In the experiment, a wind tunnel with a square discharge is used and main...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. June 2010, 132(6): 061101.
Published Online: May 19, 2010
...Eric W. M. Roosenboom; Andreas Schröder The flow phenomena in the slipstream around an eight-bladed propeller at thrust reverse conditions are analyzed using double stereoscopic particle image velocimetry in the Airbus Low-Speed Wind Tunnel Facility in Bremen, Germany. Several planes are scanned...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. May 2010, 132(5): 051111.
Published Online: May 14, 2010
... pressure signals. All measurements in this work were conducted at Ford’s acoustic wind tunnel in Cologne. All three simulations accurately predict the velocity magnitude closest to the window and downstream of the mirror head recirculation zone. Some variations in the size and shape of this recirculation...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. February 2010, 132(2): 021201.
Published Online: February 3, 2010
... a confined environment such as a wind tunnel. It includes (a) establishing a relation between the Strouhal number and a modified Strouhal number by a theoretical wake width and (b) incorporating this wake width into a momentum equation to determine the pressure drag. Comparisons have been made with...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. October 2009, 131(10): 101103.
Published Online: September 18, 2009
...Christopher J. Baker; Mark Sterling This paper describes the results of wind tunnel tests that were carried out to measure the aerodynamic characteristics of an electrical multiple unit (EMU) vehicle in a cross wind. The measurements were made on a 1/30 scale model of the Class 365 EMU in a...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. June 2009, 131(6): 064501.
Published Online: May 13, 2009
... ratio from 2/6 to 6/6 (square prism) with the small rectangular-shaped cut-corners at the front-edge. The wind tunnel experiment is carried out to obtain time-averaged hydrodynamic forces measured by the force transducer at Re ≈ 50 , 000 . The contour map of the hydrodynamic coefficients with respect to...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. January 2009, 131(1): 011203.
Published Online: December 2, 2008
... parallel flow at zero incidence was studied in a subsonic wind tunnel. Experiments were performed for 15 m/s and 22 m/s. They showed that electric discharges ( ± 8 kV, 1 kHz) acting on a laminar flow tripped the laminar-to-turbulent transition. Moreover, higher applied voltages (up to ± 12 kV, 1 kHz) were...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. January 2009, 131(1): 011204.
Published Online: December 2, 2008
... = 0.2 and 0.41), as a function of freestream velocities of a 2 × 2 m 2 wind tunnel. Convection velocity of instabilities was measured along the shear layer, using velocity cross-correlations. Experiments have shown that in deep cavity for low Mach numbers, oscillations of discrete frequencies can be...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. November 2008, 130(11): 111104.
Published Online: September 23, 2008
...T. P. Chong; P. F. Joseph; P. O. A. L. Davies This paper represents the results of an experimental program with the aim of controlling the flow in a highly unstable 90 deg curved diffuser. The diffuser, which is an integral part of an open jet wind tunnel at the University of Southampton, has the...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. July 2008, 130(7): 074504.
Published Online: July 22, 2008
...Wen-Guang Li The two-step method for optimizing net positive suction head required (NPSHr) of axial-flow pumps is proposed in this paper. First, the NPSHr at the impeller tip is optimized with impeller diameter based on experimental data of 2D cascades in available wind tunnels. Then, it is...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. July 2008, 130(7): 071103.
Published Online: July 2, 2008
... 6.29. 13 configurations of varying dihedral arrangements were analyzed with a vortex lattice method and tested in a low-speed wind tunnel at a Reynolds number of 600,000. While the analytic method provided fair agreement with the experimental results, the predicted trends in lift, drag, and (to a...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. July 2008, 130(7): 071101.
Published Online: June 25, 2008
...Joseph Katz; Frederic Morey The aerodynamic performance of several vortex generators (VGs) of the type used on the lower surface of race cars was tested in a low-speed wind tunnel. In this particular application, the vortices emanating from the VGs create a suction force between the vehicle and the...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2007, 129(12): 1577–1583.
Published Online: June 13, 2007
... 1.0 was tested in a wind tunnel facility. Surface pressure measurements and wake velocity measurements, using hot-wire anemometry, were conducted to examine the resulting flow regimes. The results indicated several different flow regimes for the different yaw angle and cavity depth configurations...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. September 2007, 129(9): 1241–1244.
Published Online: May 31, 2007
...Con J. Doolan A potential flow and viscous flow solver have been coupled to produce a robust computational tool useful for the design of low-speed wind tunnel contractions. After validation against published numerical and experimental wind tunnel data, the method is used to evaluate recently...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. August 2007, 129(8): 1030–1037.
Published Online: February 23, 2007
... symmetry at the wing/body junction of six different wing shapes. The wings were mounted on the wind tunnel floor at a zero degree angle-of-attack. The six wing shapes tested were: a 3:2 semi-elliptical-nosed NACA 0020 tailed generic body shape (Rood wing), a parallel center-body model, a tear-drop model, a...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. June 2007, 129(6): 682–694.
Published Online: December 5, 2006
...João B. P. Falcão Filho; Marcos A. Ortega Injectors are to be installed in a transonic wind tunnel with the ultimate objective of expanding the Reynolds number envelope. The aim of this research effort is to numerically simulate the steady mixing process involving the supersonic jets and the tunnel...