Journal of Fluids Engineering: Recent submissions
Now showing items 1361-1380 of 9024
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Effect of Gurney Flaps on an Elliptical Airfoil
(The American Society of Mechanical Engineers (ASME), 2017)A low-speed wind tunnel investigation is presented characterizing the impact of Gurney flaps on an elliptical airfoil. The chordwise attachment location and height of the flaps were varied, as was the Reynolds number. The ... -
Experimental Study of Suction Flow Control Effectiveness in a Serpentine Intake
(The American Society of Mechanical Engineers (ASME), 2017)The intakes of modern aircraft are subjected to ever-increasing demands in their performance. Particularly, they are expected to carry out diffusion with the highest isentropic efficiency while subjected to aggressive ... -
Acoustic Boundary Layer Attenuation in Ducts With Rigid and Elastic Walls Applied to Cochlear Mechanics
(The American Society of Mechanical Engineers (ASME), 2017)The cochlea is the most important part of the hearing system, due to the fact that it transforms sound guided through air, bone, and lymphatic fluid to vibrations of the cochlear partition which includes the organ of Corti ... -
Transient Flow Study of a Novel Three-Cylinder Double-Acting Reciprocating Multiphase Pump
(The American Society of Mechanical Engineers (ASME), 2017)In petroleum industry, the stability of multiphase pumping is highly disturbed by the gas' presence with high content and variable working conditions. This paper is focused on studying the whole working cycle of the novel ... -
Nozzle Aspect Ratio Effect on Supersonic Elliptic Jet Mixing
(The American Society of Mechanical Engineers (ASME), 2017)Nozzle aspect ratio effect on the mixing of Mach 2 elliptic free jet, issuing from convergent–divergent elliptic nozzles of aspect ratios 2, 3, and 4, in the presence of adverse and marginally favorable pressure gradients ... -
Dye Visualization of In-Line Twin Synthetic Jets in Crossflows—A Parametric Study
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents a parametric study on the interaction of twin circular synthetic jets (SJs) that are in line with a crossflow over a flat plate. The resulting vortex structures under different actuation, and flow ... -
Numerical Investigations of Unsteady Flows and Particle Behavior in a Cyclone Separator
(The American Society of Mechanical Engineers (ASME), 2017)Mechanism of particle separation in a cyclone separator is fully clarified by one-way coupled numerical simulations of large eddy simulation and particle tracking. The former resolves all the important vortical structures, ... -
Numerical Study of Turbulent Helical Pipe Flow With Comparison to the Experimental Results
(The American Society of Mechanical Engineers (ASME), 2017)Turbulent flow through helical pipes with circular cross section is numerically investigated comparing with the experimental results obtained by our team. Numerical calculations are carried out for two helical circular ... -
Finite Volume, Computational Fluid Dynamics-Based Investigation of Supercavity Pulsations
(The American Society of Mechanical Engineers (ASME), 2017)Computations of pulsating supercavity flows behind axisymmetric disk cavitators are presented. The method of computation is a finite volume discretization of the equations of mixture fluid motion. The gas phase is treated ... -
Experimental and Numerical Investigation of the Growth of an Air/SF6 Turbulent Mixing Zone in a Shock Tube
(The American Society of Mechanical Engineers (ASME), 2017)Shock-induced mixing experiments have been conducted in a vertical shock tube of 130 mm square cross section located at ISAE. A shock wave traveling at Mach 1.2 in air hits a geometrically disturbed interface separating ... -
A Functional Relationship for Modeling Laminar to Turbulent Flow Transitions
(The American Society of Mechanical Engineers (ASME), 2017)A dimensional analysis which is based on the scaling of the two-dimensional Navier–Stokes equations is presented for correlating bulk flow characteristics arising from a variety of initial conditions. The analysis yields ... -
Water Droplet Adhesion on Hydrophobic Surfaces: Influence of Droplet Size and Inclination Angle of Surface on Adhesion Force
(The American Society of Mechanical Engineers (ASME), 2017)Adhesion of various size sessile droplets on the hydrophobic surfaces is considered, and the moment generated about the locus of the droplet meniscus is determined for several inclination angles of hydrophobic surface. An ... -
Numerical Investigation of Air/Water and Hydrogen/Diesel Flow Across Tube Bundles With Baffles
(The American Society of Mechanical Engineers (ASME), 2017)Two-phase flows across tube bundles are very commonly found in industrial heat exchange equipment such as shell and tube heat exchangers. However, recent studies published in the literature are generally performed on devices ... -
Coalescence Prevention Algorithm for Level Set Method
(The American Society of Mechanical Engineers (ASME), 2017)An algorithm to prevent or delay bubble coalescence for the level set (LS) method is presented. This novel algorithm uses the LS method field to detect when bubbles are in close proximity, indicating a potential coalescence ... -
Evolutions of Pressure Fluctuations and Runner Loads During Runaway Processes of a Pump-Turbine
(The American Society of Mechanical Engineers (ASME), 2017)The pressure fluctuations and runner loads on a pump-turbine runner during runaway process are very violent and the corresponding flow evolution is complicated. To study these phenomena and their correlations in depth, the ... -
Pressure Drop Analysis of Pilot-Control Globe Valve With Different Structural Parameters
(The American Society of Mechanical Engineers (ASME), 2017)Pilot-control globe valve (PCGV) can use the pressure drop caused by fluid flowing through the orifice located at valve core bottom to open or close the main valve using a small pilot valve. In this paper, computational ... -
Particle Image Velocimetry Investigation of the Leakage Flow Through Clearance Gaps in Cambered Hydrofoils
(The American Society of Mechanical Engineers (ASME), 2017)In Francis turbines, which are normally designed at a reaction ratio of 0.5, the available pressure energy in the fluid is converted into 50% kinetic energy before entering the runner. This causes high acceleration of the ... -
Experimental and Numerical Studies on Gas Flow Through Silicon Microchannels
(The American Society of Mechanical Engineers (ASME), 2017)The present work investigates the extension of Navier–Stokes equations from slip-to-transition regimes with higher-order slip boundary condition. To achieve this, a slip model based on the second-order slip boundary condition ... -
Static Pressure Characteristics in a Pin-Fin Channel With Shaped Cylindrical Pins
(The American Society of Mechanical Engineers (ASME), 2017)Standard pin-fins in the heat transfer channels are shaped to reduce the pressure penalty and increase the thermal performance. The paper presents experimental results of the wall-static pressure distributions in an array ... -
Design Optimization of a Vaneless “Fish-Friendly” Swirl Injector for Small Water Turbines
(The American Society of Mechanical Engineers (ASME), 2017)Large-scale power generation and delivery to remote locales is often prohibitively expensive, due in part to the excessive costs of delivering the materials required to build the necessary infrastructure. In addition, these ...