Journal of Fluids Engineering: Recent submissions
Now showing items 3601-3620 of 9024
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An Assessment of the Influence of Environmental Factors on Cavitation Instabilities
(The American Society of Mechanical Engineers (ASME), 2008)Cavitation induced flow instabilities are of interest in numerous applications. Experimental and numerical investigations of this phenomenon are taking place at several institutions around the ... -
Separated Flows Around the Rear Window of a Simplified Car Geometry
(The American Society of Mechanical Engineers (ASME), 2008)A 3D numerical simulation based on the lattice Boltzmann method is carried out on a simplified car geometry (initially proposed by , , and , 1984, SAE Technical Paper series No. 840300) to ... -
Effect of Surface Roughness on Single Cryogen Droplet Spreading
(The American Society of Mechanical Engineers (ASME), 2008)Cryogen spray cooling is an auxiliary procedure to dermatologic laser surgery, which consists of precooling the superficial skin layer (epidermis) during laser irradiation of subsurface targets ... -
Numerical and Experimental Studies of Oscillatory Airflows Induced by Rotation of a Grass-Cutting Blade
(The American Society of Mechanical Engineers (ASME), 2008)Three-dimensional oscillatory airflows induced by a rotating grass-cutting blade in a cylindrical chamber are studied experimentally and numerically in this paper. Experimental pressure results are ... -
Improvement of Hydrofoil Performance by Partial Ventilated Cavitation in Steady Flow and Periodic Gusts
(The American Society of Mechanical Engineers (ASME), 2008)This paper describes a study of the response of a recently developed low-drag partially cavitating hydrofoil (denoted as OK-2003) to periodical perturbations of incoming flow. A two-flap assembly ... -
Influence of Staggering Angle of a Rotating Rod on Flow Past a Circular Cylinder
(The American Society of Mechanical Engineers (ASME), 2008)The influence of the staggering position of a rotating rod on flow past a main circular cylinder is investigated numerically. The rod is rotated at a constant speed ratio of 3. The effect ... -
Unsteady Vortex Flows Produced by Trailing Edge Articulation
(The American Society of Mechanical Engineers (ASME), 2008)The unsteady vortex flows produced by biologically inspired tail articulation are investigated. The application is to provide active means of reducing tonal noise due to upstream wake interaction ... -
Effects of Corrugated Roughness on Developed Laminar Flow in Microtubes
(The American Society of Mechanical Engineers (ASME), 2008)The effects of corrugated surface roughness on developed laminar flow in microtubes are investigated. The momentum equation is solved using a perturbation method with slip at the boundary. Novel ... -
A Model of Piston Sliding Process for a Double Piston-Actuated Shock Tube
(The American Society of Mechanical Engineers (ASME), 2008)A double piston-actuated structure designed for replacing the use of diaphragms in conventional shock tubes has been recently developed. In order to clarify the piston sliding process for this ... -
Analysis of the Deterministic Unsteady Flow in a Low-Speed Axial Fan With Inlet Guide Vanes
(The American Society of Mechanical Engineers (ASME), 2008)This paper is conceived as an extension in the analysis of the periodic stator-rotor interaction in a low-speed axial fan with inlet guide vanes. Here, the present work focuses on the ... -
A Numerical and Experimental Study on the Effect of the Cone Angle of the Spindle in Murata Vortex Spinning Machine
(The American Society of Mechanical Engineers (ASME), 2008)To study the effect of the cone angle of the hollow spindle in the nozzle of Murata vortex spinning (MVS) on yarn properties, the k‐ε turbulence model is employed to simulate the airflow ... -
Optimal Performance and Geometry of Supersonic Ejector
(The American Society of Mechanical Engineers (ASME), 2008)The optimum geometries of the ejectors, which give maximum efficiency, are numerically predicted and experimentally measured. The numerical investigation is based on flow equations governing ... -
Numerical Analysis of Cavitation Instabilities in Inducer Blade Cascade
(The American Society of Mechanical Engineers (ASME), 2008)The cavitation behavior of a four-blade rocket engine turbopump inducer was simulated by the computational fluid dynamics (CFD) code FINE∕TURBO ™. The code was modified to take into account a ... -
Near Surface Velocity Distributions for Intermittent Separation of Turbulent Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2008)At the location of intermittent turbulent boundary layer separation a finite positive mean surface shear stress still exists. It is demonstrated that viscous coordinates and a mixing length ... -
Control of Vortex Shedding of Circular Cylinder in Shallow Water Flow Using an Attached Splitter Plate
(The American Society of Mechanical Engineers (ASME), 2008)In the present work, passive control of vortex shedding behind a circular cylinder by splitter plates of various lengths attached on the cylinder base is experimentally investigated in shallow ... -
Nozzle Geometry and Injection Duration Effects on Diesel Sprays Measured by X-Ray Radiography
(The American Society of Mechanical Engineers (ASME), 2008)X-ray radiography was used to measure the behavior of four fuel sprays from a light-duty common-rail diesel injector. The sprays were at 250bar injection pressure and 1bar ambient pressure. ... -
Alternate Scales for Turbulent Boundary Layer on Transitional Rough Walls: Universal Log Laws
(The American Society of Mechanical Engineers (ASME), 2008)The present work deals with four new alternate transitional surface roughness scales for description of the turbulent boundary layer. The nondimensional roughness scale ϕ is associated with the ... -
Friction Factor Measurements in an Equally Spaced Triangular Array of Circular Tubes
(The American Society of Mechanical Engineers (ASME), 2008)Friction factor data for adiabatic cross flow of water in a staggered tube array were obtained over a Reynolds number range (based on hydraulic diameter and gap velocity) of about 10,000–250,000. ... -
Mixing Flow Characteristics in a Vessel Agitated by the Screw Impeller With a Draught Tube
(The American Society of Mechanical Engineers (ASME), 2008)The circulating flow in a vessel induced by rotating impellers has drawn a lot of interests in industries for mixing different fluids. It used to rely on experiments to correlate the performance ... -
One-Dimensional Analysis of Full Load Draft Tube Surge
(The American Society of Mechanical Engineers (ASME), 2008)One-dimensional stability analysis of a hydraulic system composed of a penstock, a runner, and a draft tube was carried out to determine the cause of the full load draft tube surge. It is ...