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Keywords: Mach number
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Journal Articles
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111104.
Published Online: November 8, 2011
... flow past a semi-infinite parabola with a far-field circulation governed by a parameter à that is related to the airfoil’s angle of attack, nose radius of curvature, and camber and to the flow Mach number. The model parabola problem consists of a compressible and viscous flow described by the steady...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. June 2011, 133(6): 061102.
Published Online: June 15, 2011
... be expected for a wing that is not close to a ground plane. A three-dimensional computational fluid dynamics study was conducted, involving a modified NASA GA(W)-2 LS [1]-0413 MOD inverted wing with an endplate, to investigate the onset and significance of compressibility for low subsonic Mach numbers...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. March 2011, 133(3): 031001.
Published Online: March 10, 2011
... 10 03 2011 computational fluid dynamics cryogenics Mach number mathematical analysis nozzles turbines wheels radial turbine wheel nozzle vaneless space diffuser An attempt was made to design and develop a turboexpander suitable for indigenous condition for the purpose...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2010, 132(12): 121301.
Published Online: December 3, 2010
... equations with the AUSM + -up scheme to handle convective terms in the presence of large density gradients. The stiffness of the system due to the incompressibility of the liquid phase is addressed through an artificial increase in the Mach number. The simulation predicts the formation of a vapor cavity...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. November 2010, 132(11): 111101.
Published Online: November 18, 2010
... in the hub static pressure of approximately 7% at the vane trailing edge. This local reduction of the stator exit Mach number decreases the trailing edge losses in the transonic regime. Finally, a numerically predicted loss breakdown is presented, focusing on the relative importance of the trailing edge...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. March 2010, 132(3): 034502.
Published Online: March 18, 2010
... tube by rear-body shape adjustment. The complete Mach number regime ( M < 2 ) has been computationally analyzed for three different rear-body profiles. The results of our study indicate that significant variation in subsonic compensation characteristics of a Pitot tube is possible by this method...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. October 2009, 131(10): 101201.
Published Online: September 17, 2009
... to a much larger slip velocity than that for incompressible flow with the same value of Knudsen number and results in a corresponding decrement of friction factor. General correlations for the Poiseuille number ( f Re ) , the Knudsen number (Kn), and the Mach number (Ma) containing the first-order...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. March 2009, 131(3): 031301.
Published Online: February 4, 2009
...Si Huang; A. A. Mohamad Investigation on cavitation in multicomponent (solid-liquid and liquid-liquid) mixtures has many applications in the industries and engineering. In this paper, for simulation of multicomponent mixtures, a set of equations with first-order bubble-wall Mach number is derived...
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...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. June 2008, 130(6): 064501.
Published Online: May 19, 2008
... by using a family of inserts. The current work focused on a variety of recessed leading edge step arrangements. Configurations were tested at transonic Mach numbers spanning the range Mach 0.7–0.9, and unsteady pressure measurements were recorded at various stations within the cavity in order to obtain...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2007, 129(12): 1497–1503.
Published Online: July 27, 2007
... 2007 27 07 2007 flow instability flow simulation Mach number shock waves This paper investigates the effect of the order of accuracy of the reconstruction step in so-called “high-resolution” methods, through simulations of the multicomponent two-dimensional single-mode Richtmyer...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. October 2007, 129(10): 1328–1338.
Published Online: May 15, 2007
... are adapted to these wind-tunnel cone experiments. Here, both sharp and blunt cones are considered. For the STDS blunt-cone case, the flow conditions are a freestream Mach number of M ∞ = 8 , a freestream unit Reynolds number of Re ∞ ∕ m = 8.2021 × 10 6 , and a freestream...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. October 2007, 129(10): 1268–1276.
Published Online: April 11, 2007
...-dimensional compressible momentum and energy equations were solved for a wide range of Reynolds and Mach numbers for constant wall temperatures that are lower or higher than the inlet temperature. The channel height ranges from 2 μm to 10 μm and the channel aspect ratio is 200. The stagnation pressure p stg...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. September 2006, 128(5): 976–986.
Published Online: January 28, 2006
... plate subjected to suction and blowing from the opposite side of the plate, even though the imposed transpiration is steady. Depending on the Mach number, the Reynolds number, the distance of the transpiration boundary to the lower wall, and the transpiration profile, the unsteadiness can be inviscid...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. July 2006, 128(4): 847–855.
Published Online: November 16, 2005
... considering the problem of the computation of the corrections needed to recover equivalent free-flight conditions from wind-tunnel experiments. Using the surface response approach, optimal corrected values of the freestream Mach number and the angle of attack for the compressible turbulent flow around the RAE...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. May 2006, 128(3): 494–506.
Published Online: October 21, 2005
...Venkata Nori; Nelson Lerma; Jonas Gustavsson; Corin Segal; Rene Fernandez The effects of oscillatory backpressure on the air induction system for pulse detonation engines were examined for a two-dimensional, mixed-compression configuration at a freestream Mach number of 3.5. The pressure...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. May 2006, 128(3): 568–578.
Published Online: October 16, 2005
...Qiang Zhang; Matt Goodro; Phillip M. Ligrani; Ricardo Trindade; Sri Sreekanth The effects of surface roughness on the aerodynamic performance of a turbine vane are investigated for three Mach number distributions, one of which results in transonic flow. Four turbine vanes, each with the same shape...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. March 2006, 128(2): 239–246.
Published Online: September 22, 2005
...Eric Tromeur; Eric Garnier; Pierre Sagaut In order to assess the capability of the Sutton model to evaluate aero-optical effects in a turbulent boundary layer, large-eddy simulation (LES) evolving spatially and Reynolds averaged Navier-Stokes (RANS) computations are carried out at Mach number equal...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. November 2005, 127(6): 1071–1084.
Published Online: July 12, 2005
... supersonic flow turbulence flow measurement Mach number jets After more than five decades of research, investigations of delta wing vortices continue to be of both practical and academic importance. However, a quantitative comparison of these vortices between incompressible and supersonic regimes...
Journal Articles
Article Type: Technical Papers
J. Fluids Eng. November 2005, 127(6): 1085–1094.
Published Online: July 5, 2005
... were conducted in an intermittent blowdown wind tunnel at the University of Illinois Gas Dynamics Laboratory. This tunnel uses an annular converging-diverging nozzle with an exit Mach number of 2.46 ( 16 ). The stagnation temperature and pressure are 302 ± 2 K and 545 kPa ± 2...