Journal of Fluids Engineering: Recent submissions
Now showing items 3621-3640 of 9024
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Vorticity Dynamics in Axial Compressor Flow Diagnosis and Design
(The American Society of Mechanical Engineers (ASME), 2008)It is well recognized that vorticity and vortical structures appear inevitably in viscous compressor flows and have strong influence on the compressor performance. However, conventional analysis ... -
Plasma-Based Flow-Control Strategies for Transitional Highly Loaded Low-Pressure Turbines
(The American Society of Mechanical Engineers (ASME), 2008)Recent numerical simulations have indicated the potential of plasma-based active flow control for improving the efficiency of highly loaded low-pressure turbines. The configuration considered in ... -
Turbulence and Secondary Flows in an Axial Flow Fan With Variable Pitch Blades
(The American Society of Mechanical Engineers (ASME), 2008)This paper analyzes the structure of turbulence and secondary flows at the exit of an axial flow fan with variable pitch blades. The influence of changing the blades’ pitch angle over the ... -
Study of Oscillating Flow of Viscoelastic Fluid With the Fractional Maxwell Model
(The American Society of Mechanical Engineers (ASME), 2008)The oscillating flow of the viscoelastic fluid in cylindrical pipes has been applied in many fields, such as industries of petroleum, chemistry, and bioengineering. It is studied using the ... -
A Separation Criterion With Experimental Validation for Shear-Driven Films in Separated Flows
(The American Society of Mechanical Engineers (ASME), 2008)The behavior of a shear-driven thin liquid film at a sharp expanding corner is of interest in many engineering applications. However, details of the interaction between inertial, surface tension, ... -
Design and Validation of a Scale-Adaptive Filtering Technique for LRN Turbulence Modeling of Unsteady Flow
(The American Society of Mechanical Engineers (ASME), 2008)An adaptive low-pass filtering procedure for the modeled turbulent length and time scales is derived and applied to Wilcox’ original low reynolds number k-ω turbulence model. It is shown that ... -
Fluid Flow in an Annular Microchannel Subjected to Uniform Wall Injections
(The American Society of Mechanical Engineers (ASME), 2008)Analytical analysis of fluid flow in an annular microchannel subjected to uniform wall injection at various Reynolds numbers is presented. The classical Navier–Stokes equations are used in the ... -
A Series Pressure Drop Representation for Flow Through Orifice Tubes
(The American Society of Mechanical Engineers (ASME), 2008)A simple model is developed here to predict the pressure drop and discharge coefficient for incompressible flow through orifices with length-to-diameter ratio greater than zero (orifice tubes) ... -
A Moving Boundary Analysis for Start-Up Performance of a Nuclear Steam Generator
(The American Society of Mechanical Engineers (ASME), 2008)Thermohydraulic phenomena of a steam-water natural-circulation (SWNC) system are very complicated, particularly, during its start-up and shutdown. Its performance strongly depends on the circulation ... -
On the Interaction of Water Waves With a Surface-Parallel Vortex
(The American Society of Mechanical Engineers (ASME), 2008)An experimental study was performed to investigate the interaction of water waves with a surface-parallel oriented vortex at a free surface. Shadowgraph images were obtained visualizing surface ... -
Turbulent Boundary Layer With Negligible Wall Stress
(The American Society of Mechanical Engineers (ASME), 2008)The turbulent boundary layer subjected to strong adverse pressure gradient near the separation region has been analyzed at large Reynolds numbers by the method of matched asymptotic expansions. ... -
Linear Stability of Weakly Forced Taylor-Vortex Flow
(The American Society of Mechanical Engineers (ASME), 2008)Linear stability analysis of fully developed axisymmetric steady spatially modulated Taylor–Couette flow (TCF) is carried out in the narrow-gap limit. In contrast to unforced TCF, only the vortical ... -
Characterization of Air Flow Through Sintered Metal Foams
(The American Society of Mechanical Engineers (ASME), 2008)This study investigates air flow in metallic foams, which are produced by the slip reaction foam sintering (SRFS) process. It was conducted as part of the collaborative research center (SFB) ... -
Numerical Simulation for Vortex Structure in a Turbopump Inducer: Close Relationship With Appearance of Cavitation Instabilities
(The American Society of Mechanical Engineers (ASME), 2008)Unsteady cavitation phenomena such as rotating cavitation and cavitation surge are often observed in a turbopump inducer of a rocket engine, sometimes causing undesirable oscillation of the system. ... -
Hysteresis Curve in Reproduction of Reynolds’ Color-Band Experiments
(The American Society of Mechanical Engineers (ASME), 2008)This article describes the reproduction and extended analysis of Reynolds’ color-band experiment. Reynolds found two critical Reynolds numbers (Rc) in pipe flows: Rc1 of 12,830 from laminar to ... -
Acoustic Power Calculation in Deep Cavity Flows: A Semiempirical Approach
(The American Society of Mechanical Engineers (ASME), 2008)Acoustic power generated by turbulent flow over a coaxial side branch (deep cavity) resonator mounted in a rectangular duct is calculated using a semiempirical approach. Instantaneous flow velocity ... -
The Effects of Splitter Plates on Turbulent Boundary Layer on a Long Flat Plate Near the Trailing Edge
(The American Society of Mechanical Engineers (ASME), 2008)An experimental investigation has been made on a turbulent boundary layer near the trailing edge on a long flat plate. The flow was controlled by an additional splitter plate fitted to the ... -
An Experimental Study of the Laminar Flow Separation on a Low-Reynolds-Number Airfoil
(The American Society of Mechanical Engineers (ASME), 2008)An experimental study was conducted to characterize the transient behavior of laminar flow separation on a NASA low-speed GA (W)-1 airfoil at the chord Reynolds number of 70,000. In addition ... -
Computational Modeling and Simulation of a Single-Jet Water Meter
(The American Society of Mechanical Engineers (ASME), 2008)A single-jet water meter was modeled and simulated within a wide measuring range that included flow rates in laminar, transitional, and turbulent flow regimes. The interaction between the turbine ... -
A Runback Criterion for Water Drops in a Turbulent Accelerated Boundary Layer
(The American Society of Mechanical Engineers (ASME), 2008)Predicting the runback threshold for liquid drops in aerodynamic boundary layers is a challenging problem with numerous applications including aircraft icing simulations. The critical parameters ...