Journal of Fluids Engineering: Recent submissions
Now showing items 461-480 of 9024
-
Experimental and Numerical Investigation of Recirculation Structures in Isothermal Swirling Coaxial Jet
(The American Society of Mechanical Engineers (ASME), 2022)Three-dimensional (3D) unsteady Reynolds-averaged Navier–Stokes (URANS) simulations are conducted in a coaxial swirling jet. Two distinct types of recirculation zones (RZ) relevant to coaxial swirling jets are considered ... -
Transient Regulating Characteristics of V-Port Ball Valve in Opening and Closing Process
(The American Society of Mechanical Engineers (ASME), 2022)V-port ball valves have been widely utilized as a control device in various fluid transmission systems, achieving the function of throttling and controlling the flow direction effectively. However, the flow characteristics ... -
Cavitation Characterization of Fluid Machinery Based on Cyclostationary Analysis: Part 1—Cavity Type Identification by Carrier Distribution
(The American Society of Mechanical Engineers (ASME), 2022)The state characterization of cavitation is significant not only for preventing catastrophic faults in industrial applications but also for keeping equipment stealthiness for military purposes. Many works concerning ... -
A Robust Pseudo-Three-Dimensional Computational Fluid Dynamic Approach for Industrial Applications
(The American Society of Mechanical Engineers (ASME), 2022)Two-dimensional instead of three-dimensional computational fluid dynamic solutions of flow problems are quite often used in industry to facilitate short design turn-around times with varying degrees of success. A simple ... -
Lid-Driven Butterfly Cavity for a Controllable Viscous Flow
(The American Society of Mechanical Engineers (ASME), 2022)The theme of current effort is to numerically analyze physical aspects of the flow triggered by a lid-driven cavity of butterfly cross section. The main goal is to search how the butterfly shape adds to the mixing phenomenon ... -
A New Turbulent Viscosity Correction Model With URANS Solver for Unsteady Turbulent Cavitation Flow Computations
(The American Society of Mechanical Engineers (ASME), 2022)Due to the ignorance of the effect of the water–vapor interface on the cavitation flow field, the standard k–ε turbulence model (ST model) may overestimate the turbulent viscosity. It is unable to simulate cavitation ... -
Combined Effects of the Turbulence and Interfacial Momentum Transfer on Two-Phase Turbulent Bubbly Flows
(The American Society of Mechanical Engineers (ASME), 2022)The paper studies one-way and two-way coupling interactions between the liquid turbulence and bubbles' presence in bubbly jets. One-way coupling focuses on jet with low void fraction in which the bubbles have no significant ... -
Multiphase Flows in Plate and Shell Heat Exchangers
(The American Society of Mechanical Engineers (ASME), 2022)Air–water and air–water–oil flows were analyzed in a complex channel prototype of a plate and shell heat exchanger (PSHE) with the aid of a fast camera. Air–water flows were characterized before the PSHE inlet port by ... -
Characterization of the Flow and Surface Temperature Around Multiple Vortex Generators
(The American Society of Mechanical Engineers (ASME), 2022)An experimental investigation was carried out to study the effects of single and multiple vortex generators (VGs) on the mean velocity, turbulence levels, and surface temperature distributions in a square channel. The flow ... -
Nonlinear Multimodal Model for Tuned Sloshing Dampers With Nonflat Bottoms
(The American Society of Mechanical Engineers (ASME), 2022)A third-order nonlinear multimodal model is developed for tanks with nonflat bottoms. A six-node finite element model is used to determine the mode shapes of the velocity potential and the associated natural sloshing ... -
An Improved One-Dimensional Flow Model for Side Chambers of Centrifugal Pumps Considering the Blade Slip Factor
(The American Society of Mechanical Engineers (ASME), 2022)The blade slip factor significantly influences the prediction accuracy of the self-closure one-dimensional flow model for side chambers of centrifugal pumps. Wiesner's and Stodola's slip factors, which are used to formulate ... -
Stability of Hydrogen Turbopump Rotor Shaft Axially Self-Balanced
(The American Society of Mechanical Engineers (ASME), 2022)Controlling the vibration levels of turbopump rotor shafts is a key feature for the reliability of space engines. Turbopump components are exposed to high static and dynamic stress levels, and therefore are particularly ... -
Numerical Investigation on Blockage-Related Cavitation Surge and Pressure Gain of a Mixed-Flow Pump With Influence of Blade Leading Edge Shape on Suction Performance
(The American Society of Mechanical Engineers (ASME), 2022)The blade leading edge is a design variable that can affect the local flow patterns and pressure peaks, implying a direct effect on the cavitation performance. This study was conducted to analyze the effect of the blade ... -
Numerical Investigation of the Effect of Rigid Vegetation at an Inclined Bank, on Streamflow Hydrodynamics
(The American Society of Mechanical Engineers (ASME), 2022)This study is a computational analysis of hydrodynamic alterations of flow such as secondary current, turbulent kinetic energy, and shear stress, in an open channel with an increased vegetation density at an inclined bank. ... -
Numerical Study of Unsteady Cavitating Flow in an Inducer With Omega Vortex Identification
(The American Society of Mechanical Engineers (ASME), 2022)To accurately capture the behaviors of cavitation and reveal the unsteady cavitating flow mechanism, a condensate pump inducer is numerically analyzed in a separate numerical experiment with large eddy simulation (LES) at ... -
Response of a Tandem-Staged Compressor to Circumferential Inflow Distortion
(The American Society of Mechanical Engineers (ASME), 2022)Tandem rotor, as a concept, promises a higher diffusion capacity than a single rotor. However, it is reported to have a lower operating range than the conventional rotor. Inflow distortion can lead to significant changes ... -
Numerical Study of Mitigating Cloud Cavitation Shedding Using Biomimetic Protuberant Stripes
(The American Society of Mechanical Engineers (ASME), 2022)Cloud cavitation usually appears on impeller blades of hydraulic machinery. When unsteady cloud cavitation travels downstream to a high-pressure region and collapses, performance drops and cavitation erosion appears. It ... -
Modified Savonius Wind Turbine for Wind Energy Harvesting in Urban Environments
(The American Society of Mechanical Engineers (ASME), 2022)The flow-induced rotation of the modified Savonius rotor, for which the blade consists of a semicircular profile and an elliptical shape, is studied using a series of unsteady computational fluid dynamics (CFD) simulations. ... -
Validation of the Porous Medium Approximation for Hydrodynamics Analysis in Compact Heat Exchangers
(The American Society of Mechanical Engineers (ASME), 2022)Compact heat exchangers (HXs) have gained attention in recent years in various fields such as solar and nuclear power generation, oil and gas, and refrigeration due to their low cost, high power density, and robustness in ... -
Influence of Geometric Variations of an Inlet Cover Bleed System on Inducer Performance for an Axial Pump Operating Under Cavitating Conditions
(The American Society of Mechanical Engineers (ASME), 2022)A stability control device (SCD) is a passive inlet cover treatment that can be applied to high suction performance inducers. Significant improvements in stability have been observed when an inducer operates with an SCD, ...