Journal of Fluids Engineering: Recent submissions

Now showing items 5761-5780 of 9024

    • The Experimental Investigation of Jet Fan Aerodynamics Using Wind Tunnel Modeling 

      K. R. Mutama; A. E. Hall (The American Society of Mechanical Engineers (ASME), 1996)
      Jet fan aerodynamic behavior was investigated using wind tunnel modeling. Conditions were created to simulate mine and vehicular tunnel ventilation where these fans are finding increased application. ...

    • Arbitrary Blade Section Design Based on Viscous Considerations. Blade Optimization 

      B. Bouras; F. Karagiannis; P. Chaviaropoulos; K. D. Papailiou (The American Society of Mechanical Engineers (ASME), 1996)
      A blade design and optimization procedure is presented in this work, which is based on viscous flow considerations. This procedure concerns the design of optimum rotating arbitrary compressible ...

    • Jet Interaction in Liquid-Liquid Coaxial Injectors 

      D. Sivakumar; B. N. Raghunandan (The American Society of Mechanical Engineers (ASME), 1996)
      Interaction between two conical sheets of liquid formed by a coaxial swirl injector has been studied using water in the annular orifice and potassium permanganate solution in the inner orifice. ...

    • The Simulation of Mixing Layers Driven by Compound Buoyancy and Shear 

      D. M. Snider; M. J. Andrews (The American Society of Mechanical Engineers (ASME), 1996)
      Fully developed compound shear and buoyancy driven mixing layers are predicted using a k-ε turbulence model. Such mixing layers present an exchange of equilibrium in mixing flows. The k-ε ...

    • Gas-Liquid Bubbly Flow in Vertical Pipes 

      V. E. Nakoryakov; O. N. Kashinsky; V. V. Randin; L. S. Timkin (The American Society of Mechanical Engineers (ASME), 1996)
      Gas-liquid bubbly flow was investigated in vertical pipes for different flow conditions: fully developed turbulent downward flow in a 42.3 mm diameter pipe and upward flow in a 14.8 mm diameter ...

    • Numerical Study of Viscous Flows Inside Partially Filled Spinning and Coning Cylinders 

      Mohamed Selmi (The American Society of Mechanical Engineers (ASME), 1996)
      This paper is concerned with the solution of the 3-D-Navier-Stokes equations describing the steady motion of a viscous fluid inside a partially filled spinning and coning cylinder. The cylinder ...

    • Friction Factor In Sine-Pipe Flow 

      C. O. Popiel; D. F. van der Merwe (The American Society of Mechanical Engineers (ASME), 1996)
      Measurements of pressure losses in a sine-waved hydraulically smooth pipe, having a centerline described by the formula y = h sin (2πx/λ), are presented. The effect of the dimensionless wave-length ...

    • Application of Chaos Theory in Identification of Two-Phase Flow Patterns and Transitions in a Small, Horizontal, Rectangular Channel 

      Y. Cai; M. W. Wambsganss; J. A. Jendrzejczyk (The American Society of Mechanical Engineers (ASME), 1996)
      Various measurement tools that are used in chaos theory were applied to analyze two-phase pressure signals with the objective of identifying and interpreting flow pattern transitions for two-phase ...

    • Lift and Drag Distributions of Yacht Sails Using Wake Surveys 

      N. J. Locke; P. S. Jackson; R. G. J. Flay (The American Society of Mechanical Engineers (ASME), 1996)
      The theory and numerical methods used to determine the lift and drag of a yacht model from wind-tunnel wake measurements are discussed. The results from wake surveys taken downstream of a ...

    • Large-Eddy Simulation of Turbulent Flow in a Curved Pipe 

      B. J. Boersma; F. T. M. Nieuwstadt (The American Society of Mechanical Engineers (ASME), 1996)
      In this paper, we use Large-Eddy Simulation (LES) to compute a fully-developed turbulent flow in a curved pipe. The results allow us to study how the curvature influences the mean velocity ...

    • Effect of Dispersed Phase on Modification of Turbulent Flow in a Wall Jet 

      Yohei Sato; Koichi Hishida; Masanobu Maeda (The American Society of Mechanical Engineers (ASME), 1996)
      The interaction between dispersed particles and fluid turbulence for a vertical down-flow turbulent wall jet embedded in a uniform stream was investigated experimentally and numerically. Three ...

    • A New Low-Reynolds-Number k-ε Model for Turbulent Flow Over Smooth and Rough Surfaces 

      Hanzhong Zhang; Mohammad Faghri; Frank M. White (The American Society of Mechanical Engineers (ASME), 1996)
      A new low-Reynolds-number k-ε model is proposed to simulate turbulent flow over smooth and rough surfaces by including the equivalent sand-grain roughness height into the model functions. The ...

    • Effect of Nonaxisymmetric Forcing on a Swirling Jet With Vortex Breakdown 

      Ismet Gursul (The American Society of Mechanical Engineers (ASME), 1996)
      Nonaxisymmetric forcing was applied to the vortex breakdown flowfield of a strongly swirling jet and its effects were investigated experimentally. It is shown that the spreading rate of the jet ...

    • Modeling Reynolds-Number Effects in Wall-Bounded Turbulent Flows 

      R. M. C. So; T. P. Sommer; H. Aksoy; S. P. Yuan (The American Society of Mechanical Engineers (ASME), 1996)
      Recent experimental and direct numerical simulation data of two-dimensional, isothermal wall-bounded incompressible turbulent flows indicate that Reynolds-number effects are not only present in the ...

    • Measurements of the Turbulence Structure in the Vicinity of a 3-D Separation 

      C. J. Chesnakas; R. L. Simpson (The American Society of Mechanical Engineers (ASME), 1996)
      The flow in the cross-flow separation region of a 6:1 prolate spheroid at 10 deg angle of attack, ReL = 4.20 × 106 , was investigated using a novel, miniature, 3-D, fiber-optic Laser ...

    • High Freestream Turbulence Effects on Turbulent Boundary Layers 

      K. A. Thole; D. G. Bogard (The American Society of Mechanical Engineers (ASME), 1996)
      High freestream turbulence levels significantly alter the characteristics of turbulent boundary layers. Numerous studies have been conducted with freestreams having turbulence levels of 7 percent ...

    • Turbulent Flow Simulation of a Runner for Francis Hydraulic Turbines Using Pseudo-Compressibility 

      Chuichi Arakawa; Yi Qian; Takashi Kubota (The American Society of Mechanical Engineers (ASME), 1996)
      A three-dimensional Navier-Stokes code with pseudo-compressibility, an implicit formulation of finite difference, and a k – ε two-equation turbulence model has been developed for the Francis ...

    • Development of a Two-Dimensional Turbulent Wake in a Curved Channel With a Positive Streamwise Pressure Gradient 

      J. John; M. T. Schobeiri (The American Society of Mechanical Engineers (ASME), 1996)
      The development of turbomachinery wake flows is greatly influenced by streamline curvature and streamwise pressure gradient. This paper is part of a comprehensive experimental and theoretical study ...

    • The Turbulent Incompressible Jet in a Curved Coflow 

      M. V. Ötügen; F. Girlea; P. M. Sforza (The American Society of Mechanical Engineers (ASME), 1996)
      The effects of small streamline curvature on the growth and axial flow development of a turbulent incompressible jet in a curved coflow was investigated experimentally. The jet streamline curvature ...

    • Collaborative Testing of Turbulence Models 

      P. Bradshaw; B. E. Launder; J. L. Lumley (The American Society of Mechanical Engineers (ASME), 1996)
      This is a brief report on a special project. Data from experiments and simulations were collected and distributed to over 100 turbulence modelers and other participants in 16 different countries. ...