Journal of Fluids Engineering: Recent submissions
Now showing items 1241-1260 of 9024
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Vector Control of Synthetic Jets Using an Asymmetric Slot
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents a fundamental study on jet vectoring control by adjusting the dimensionless frequency of synthetic jets over time without changing the injection nozzle shape in actuators. This work involves the ... -
One-Dimensional Analysis Method for Cavitation Instabilities of a Rotating Machinery
(The American Society of Mechanical Engineers (ASME), 2018)Rotating cavitation is an important problem, which makes it difficult to design reliable rotating machines. In this study, a simple analysis method that tried to evaluate the cavitation instabilities of a rotating machinery ... -
The Virtual Mass Theory of a Taylor Bubble Rising in Vertical Pipes
(The American Society of Mechanical Engineers (ASME), 2018)Analytical solutions were obtained for the virtual mass of a Taylor bubble rising in a liquid confined by a circular pipe under transient conditions. The solution of the virtual mass coefficient was based on potential ... -
Flow Characteristics of Three-Dimensional Curved Wall Jets on a Cylinder
(The American Society of Mechanical Engineers (ASME), 2018)Three-dimensional (3D) curved wall jets are a significant topic in various applications related to local heat and mass transfer. This study investigates the effects of the impinging angle and Reynolds number with a fixed ... -
Performance Assessment of Transition Models for Three-Dimensional Flow Over NACA4412 Wings at Low Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2018)The performance of the transition models on three-dimensional (3D) flow of wings with aspect ratios (AR) of 1 and 3 at low Reynolds number was assessed in this study. For experimental work; force measurements, surface oil ... -
Analysis of Aerothermal Characteristics of Surface Microstructures
(The American Society of Mechanical Engineers (ASME), 2018)Recent advances in manufacturing technologies, such as additive manufacturing (AM), have raised the potential of choosing surface finish pattern as a design parameter. Hence, understanding and prediction of aerothermal ... -
Drag Characterization Study of Variable Camber Continuous Trailing Edge Flap
(The American Society of Mechanical Engineers (ASME), 2018)A Reynolds-averaged Navier–Stokes (RANS) computational study was conducted to investigate the effect of various variable camber continuous trailing edge flap (VCCTEF) configurations on the lift and drag of a NASA generic ... -
A General Macroscopic Model for Turbulent Flow in Porous Media
(The American Society of Mechanical Engineers (ASME), 2018)The present study deals with the generalization of a macroscopic turbulence model in porous media using a capillary model. The additional source terms associated with the production and dissipation of turbulent kinetic ... -
Design of the Solenoid Valve of an Antilock Braking System With Reduced Flow Noise
(The American Society of Mechanical Engineers (ASME), 2018)Large eddy simulations are carried out to predict the flow noise produced in the solenoid valve of an antilock braking system (ABS) using Lighthill’s acoustic analogy and the Ffowcs Williams and Hawkings (FW–H) surface ... -
Entry Lengths of Laminar Pipe and Channel Flows
(The American Society of Mechanical Engineers (ASME), 2018)Numerical simulations of laminar pipe and channel flows were carried out: (i) to understand the effect of inlet conditions, viz., flat inlet and streamtube inlet, on entry lengths, and (ii) to investigate the flow development ... -
Elliptical Shape Hole-Pattern Seals Performance Evaluation Using Design of Experiments Technique1
(The American Society of Mechanical Engineers (ASME), 2018)Hole-pattern annular gas seals have two distinct flow regions: an annular jet-flow region between the rotor and stator, and cylindrical indentions in the stator that serve as cavities where flow recirculation occurs. As ... -
A Parametric Study of Hydrodynamic Cavitation Inside Globe Valves
(The American Society of Mechanical Engineers (ASME), 2018)Hydrodynamic cavitation that occurs inside valves not only increases the energy consumption burden of the whole piping system but also leads to severe damages to the valve body and the piping system with a large economic ... -
Toward Cost-Effective Boundary Layer Transition Computations With Large-Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2018)An efficient large-eddy simulation (LES) approach is investigated for laminar-to-turbulent transition in boundary layers. This approach incorporates the boundary-layer stability theory. Primary instability and subharmonic ... -
Numerical Investigation on Multiphase Erosion-Corrosion Problem of Steel of Apparatus at a Well Outlet in Natural Gas Production
(The American Society of Mechanical Engineers (ASME), 2018)The erosion-corrosion problem of gas well pipeline under gas–liquid two-phase fluid flow is crucial for the natural gas well production, where multiphase transport phenomena expose great influences on the feature of ... -
Rotating Corrected-Based Cavitation Model for a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2018)Cavitation has bothered the hydraulic machinery for centuries, especially in pumps. It is essential to establish a solid way to predict the unsteady cavitation evolution with considerable accuracy. A novel cavitation model ... -
Water Hammer Peak Pressures and Decay Rates of Transients in Smooth Lines With Turbulent Flow
(The American Society of Mechanical Engineers (ASME), 2018)Transient pressure peak values and decay rates associated with water hammer surges in fluid lines are investigated using an analytical method that has been formulated, in a previous publication, to simulate pressure ... -
Numerical Modeling of a Wave Turbine and Estimation of Shaft Work
(The American Society of Mechanical Engineers (ASME), 2018)Wave rotors are periodic-flow devices that provide dynamic pressure exchange and efficient energy transfer through internal pressure waves generated due to fast opening and closing of ports. Wave turbines are wave rotors ... -
Optimization of Trailing-Edge Serrations to Reduce Open-Rotor Tonal Interaction Noise
(The American Society of Mechanical Engineers (ASME), 2018)A major source of contra-rotating open rotor (CROR) tonal noise is caused by the interaction of the front-rotor (FR) wakes with the aft-rotor blades. Inspired by chevron nozzles, which increase the mixing process in jet ... -
Study on Lateral Jetting Range During an Arc-Curved Jet Impacting Nonplanar Solid Surfaces
(The American Society of Mechanical Engineers (ASME), 2018)This paper focuses on the lateral jetting commencing points associated with the peak pressure when an arc-curved jet impacts flat, concave, convex, and inclined solid surfaces, respectively. A theoretical method based on ... -
On the Impulse Produced by Chordwise Flexible Pitching Foils in a Quiescent Fluid
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, a parametric study showing the impulsive performance of foils with different flexural stiffness pitching in a quiescent fluid is presented. A wide range of Reynolds numbers (different imposed kinematics) and ...