Journal of Fluids Engineering: Recent submissions
Now showing items 1221-1240 of 9024
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Effect of Pressure-Equalizing Film on Hydrodynamic Characteristics and Trajectory Stability of an Underwater Vehicle With Injection Through One or Two Rows of Venting Holes
(The American Society of Mechanical Engineers (ASME), 2018)Pressure-equalizing film is a slice of air film generated through exhausting and attached to the vehicle's exterior with nearly uniform inner pressure. Similar to ventilated cavity in composition, but of interest, here is ... -
Flow Mechanism and Characteristics of Pressure-Equalizing Film Along the Surface of a Moving Underwater Vehicle
(The American Society of Mechanical Engineers (ASME), 2018)Pressure-equalizing film is a slice of air layer attached to vehicle exterior with nearly uniform inside pressure, similar to ventilated cavity in composition; it is generated through exhaust process of the inside air ... -
Drag Reducing Flows by Polymer Solutions in Annular Spaces
(The American Society of Mechanical Engineers (ASME), 2018)We analyze the use of water solutions of Xanthan Gum (XG) for drag reduction (DR) in annular spaces. We provide a direct quantitative comparison between the DR in an annulus and that in straight tubes. We can fairly compare ... -
Research on the Turbine Blade Vibration Base on the Immersed Boundary Method
(The American Society of Mechanical Engineers (ASME), 2018)This paper is concerned with the study of a kind of discrete forcing immersed boundary method (IBM) by which the loosely aero-elasticity coupled method is developed to analyze turbine blade vibration. In order to reduce ... -
Multiphase Flow Performance Prediction Model for Twin-Screw Pump
(The American Society of Mechanical Engineers (ASME), 2018)This study is focused on the development and validation of an analytical model to predict the performance characteristics of multiphase flow twin-screw pump for wide range of operating conditions. A 200 HP, 635 gpm capacity ... -
Influence of Stator Blade Geometry on Torque Converter Cavitation
(The American Society of Mechanical Engineers (ASME), 2018)Cavitation in torque converters may cause degradation in hydrodynamic performance, severe noise, or even blade damage. Researches have highlighted that the stator is most susceptible to the occurrence of cavitation due to ... -
Influence of Geometry of Inlet Guide Vanes on Pressure Fluctuations of a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2018)Prewhirl regulation by inlet guide vanes (IGVs) has been proven as an effective method for operation regulation of centrifugal pumps. By contrast, the influence of the geometry of IGVs on operation stability of centrifugal ... -
Numerical Simulation of Cloud Cavitation in Hydrofoil and Orifice Flows With Analysis of Viscous and Nonviscous Separation
(The American Society of Mechanical Engineers (ASME), 2018)Three-dimensional (3D) numerical flow simulations with a mass transfer cavitation model are performed to analyze cloud cavitation at two different flow configurations, i.e., hydrofoil and orifice flows, focusing on the ... -
Effects of Damping on Flow-Mediated Interaction Between Two Cylinders
(The American Society of Mechanical Engineers (ASME), 2018)This study investigates the flow-mediated interaction between two vibrating cylinders of the same size immersed in an otherwise still fluid. The master cylinder carries out forced vibration, while the slave cylinder is ... -
Comparisons of Shear Stress Transport and Detached Eddy Simulations of the Flow Around Trains
(The American Society of Mechanical Engineers (ASME), 2018)Shear stress transport (SST) k–ω model and detached eddy simulation (DES) have been widely applied in crosswind stability simulations for trains in the literature. In the previous research, the influence of the SST and DES ... -
A Method of Measuring Turbulent Flow Structures With Particle Image Velocimetry and Incorporating Into Boundary Conditions of Large Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2018)The setup of inlet conditions for a large eddy simulation (LES) is a complex and important problem. Normally, there are two methods to generate the inlet conditions for LES, i.e., synthesized turbulence methods and precursor ... -
An Experimental Analysis of the Structural Response of Flexible Lightweight Hydrofoils in Cavitating Flow
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents an original experimental study concerning the structural response of a flexible lightweight hydrofoil undergoing various flow conditions including partial cavitating flow. It is based on the analysis ... -
Computational Analysis of Foil Air Journal Bearings Using a Runtime-Efficient Segmented Foil Model
(The American Society of Mechanical Engineers (ASME), 2018)This contribution is concerned with the development and the implementation of a foil air journal bearing model. For this purpose, the numerical procedure solving the Reynolds equation for compressible fluids has to be ... -
Experimental Investigation of the Aerodynamics and Flowfield of a NACA 0015 Airfoil Over a Wavy Ground
(The American Society of Mechanical Engineers (ASME), 2018)Experimental Investigation of the Aerodynamics and Flowfield of a NACA 0015 Airfoil Over a Wavy Ground;The aerodynamic properties and flowfield of a NACA 0015 airfoil over a wavy ground were investigated experimentally via ... -
Ground Effect on the Vortex Flow and Aerodynamics of a Slender Delta Wing
(The American Society of Mechanical Engineers (ASME), 2018)The ground effect on the aerodynamic loading and leading-edge vortex (LEV) flow generated by a slender delta wing was investigated experimentally. Both the lift and drag forces were found to increase with reducing ground ... -
Experimental Study on Cavitation-Induced Air Release in Orifice Flows
(The American Society of Mechanical Engineers (ASME), 2018)Cavitation leads to rapid degassing of fluids. Up to date, there is a lack of model approaches of cavitation-induced degassing. The aim of the present study is to gain a more thorough knowledge of the process. Therefore, ... -
Response of a Circular Cylinder Wake to Periodic Wave Excitations
(The American Society of Mechanical Engineers (ASME), 2018)Two-dimensional (2D) numerical simulations of multiphase flows past a circular cylinder close to free surface waves were performed to investigate an interaction of vortex formation around a cylinder with periodic waves by ... -
Effects of Chemical Composition on the Electromechanical Properties of Microfluidically Synthesized Hydrogel Beads
(The American Society of Mechanical Engineers (ASME), 2018)This investigation demonstrates microfluidic synthesis of monodisperse hydrogel beads with controllable electromechanical properties. Hydrogel beads were synthesized using aqueous monomer solutions containing difunctional ... -
A Numerical Investigation of the Onset of Flow Separation in Round-Edge Diverging Tees
(The American Society of Mechanical Engineers (ASME), 2018)The onset condition of flow separation in diverging tee junctions was investigated numerically. Flow separation and recirculation at the proximal region of a bypass graft can contribute to early phase graft failure in ... -
Numerical Analysis of Suppression Effect of Asymmetric Slit on Cavitation Instabilities in Cascade
(The American Society of Mechanical Engineers (ASME), 2018)In this study, numerical analysis is carried out around the cyclic flat-plate cascade with symmetric and asymmetric slit, so as to examine the suppressing or controlling effect of the slit on cavitation instabilities such ...