Journal of Fluids Engineering: Recent submissions
Now showing items 261-280 of 9024
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The Interaction of Turbulent Spots With Low-Speed Streaks1
(The American Society of Mechanical Engineers (ASME), 2024)Turbulent spots are regions of turbulence surrounded by laminar flow that appear during the late stages of boundary layer transition. While turbulent spots are often studied in isolation, they usually occur near low-speed ... -
Inflow Conditions and the Flow Behavior of Submerged Annular Viscoplastic Non-Newtonian Jets
(The American Society of Mechanical Engineers (ASME), 2024)Submerged annular viscoplastic jet flows were studied numerically within the steady laminar flow regime. The impacts of inner-to-outer annular nozzle diameter ratio, and yield number, for uniform and fully-developed inflow ... -
Numerical Study of the Fluid Flow Over the Array of Rough Cylindrical Particles: An Analysis of Porous Media Flow1
(The American Society of Mechanical Engineers (ASME), 2024)The objective of the study is to thoroughly analyze the flow and heat transfer of Bingham plastic fluids through an array of uniformly gapped rough surface cylinders embedded between two confined boundaries. Radial notches ... -
A Multiscale Euler–Lagrange Model for High-Frequency Cavitation Noise Prediction
(The American Society of Mechanical Engineers (ASME), 2024)To simulate the microscale bubble distribution and its effect on high-frequency cavitation noise, we present a two-way transition and coupling Euler–Lagrange model. The model accounts for both cavity fission and environmental ... -
Experimental Investigation of the Performance of a Novel Adiabatic Swirl-Flow Separation Apparatus in Air–Water Two-Phase Flow
(The American Society of Mechanical Engineers (ASME), 2024)Experiments were performed for determining the efficacy of a swirl-flow apparatus for phase separation of a premixed two-phase air–water mixture. In the experiments gas and liquid flow rates were parametrically varied. The ... -
Comparison of Heat Transfer and Friction in Pipes With Various Internal Roughness
(The American Society of Mechanical Engineers (ASME), 2024)The heat transfer and friction factor of turbulent pipe flows with different internal roughness are experimentally investigated. Three types of roughness in forms of a mesh, hemispherical elements, and a coil are added to ... -
Effect of Bypass Duct on the Thrust Vectoring Performance of Dual Throat Nozzle in a Supersonic Aircraft
(The American Society of Mechanical Engineers (ASME), 2024)Due to its ability to maximize thrust vectoring performance, the bypass dual throat nozzle (BDTN) has an advantage over other fluidic vectoring controls. In this study, numerical simulation is performed to analyze the flow ... -
Design Method for Impeller of Centrifugal Pump With Guide Vanes Based on Oseen Vortex
(The American Society of Mechanical Engineers (ASME), 2024)Centrifugal pumps with guide vanes (GVs) are widely used in a pump as turbine, energy storage pump station, and water diversion project. The objective of this study is to establish a design method of centrifugal pumps for ... -
Evaluation of Thermoacoustic Instability for Chemically Reacting Flows Using Large-Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2024)Thermoacoustic instability for chemically reacting flows was investigated using large eddy simulations coupled with a lookup table for turbulence-chemistry closure. The onset of instability was evaluated from pressure ... -
An Aerodynamic Investigation of the Last-Stage Turbine in an Upgraded Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Due to the lengthy certification process for newly designed turbine blades, product upgrading of industrial gas turbine units is often performed solely on compressor and combustor. Since their inlet conditions are significantly ... -
Numerical Investigation of the Influence of Cavitation on the Runner Speed at Speed-No-Load and Runaway for a Francis Turbine of Low Specific Speed
(The American Society of Mechanical Engineers (ASME), 2024)Studies have shown that the runner speed of hydraulic turbines at no-load conditions is affected by cavitation. However, those studies did not provide explanations relating the variation of the no-load runner speed to ... -
Effect of Perforation on Vortex Characteristics of a Microvortex Generator Mounted on a Flat Plate
(The American Society of Mechanical Engineers (ASME), 2024)The effects of perforation on the characteristics of the downstream vortex of a microvortex generator (MVG) mounted on a flat plate, are numerically investigated in this paper. A single rectangular MVG with circular and ... -
Orifice Jet Curvature and Its Interaction With a Row of Short Pin-Fins
(The American Society of Mechanical Engineers (ASME), 2024)The fluidic behaviors and interactions present in a setup utilizing perforated blockages and downstream pin-fin are elucidated: specifically, the role of jet curvature in flow interactions and the interaction of end-wall ... -
Instability of Poiseuille Flow in a Bidisperse Porous Medium Subject to a Uniform Vertical Throughflow Effect
(The American Society of Mechanical Engineers (ASME), 2024)In this article, we investigate the influence of the vertical throughflow Reynolds number on the instability of Poiseuille flow in a bidisperse porous medium. The Brinkman model was employed to describe fluid flow in the ... -
The Effect of Curved Geometry on Exiting Flow of Fluidic Oscillators
(The American Society of Mechanical Engineers (ASME), 2024)Traditionally fluidic oscillators are designed to be planar. However, there are applications that may desire the exiting fluid to move in the third dimension. This could allow these oscillators to be more effective in ... -
The Effects of Rotation and Solidity on the Aerodynamic Behavior of Low-Pressure Axial Flow Fans
(The American Society of Mechanical Engineers (ASME), 2024)Implicit axial flow fan models are commonly used for the numerical analysis of industrial heat exchanger systems. However, these fan models perform poorly within the often complex off-design flow environments characteristic ... -
Aerodynamic Analysis of Low-Pressure Axial Fans Installed in Parallel
(The American Society of Mechanical Engineers (ASME), 2024)Ducted rotor-only low-pressure axial fans play an integral role in automotive thermal management. The tightly packed under-hood region and down-stream heat-exchanger shape limit the fan diameter. In order to circumvent ... -
Interstage Performance and Power Consumption of a Multistage Mixed-Flow Electrical Submersible Pump in Gas–Liquid Conditions: An Experimental Study
(The American Society of Mechanical Engineers (ASME), 2024)The performance degradation of electrical submersible pump (ESP) caused by high gas volume fraction (GVF) has always been a common problem in the field of oil and gas production. Experiments are conducted to investigate ... -
Aerodynamics and Flowfield of Distributed Electric Propulsion Tiltwing During Transition With Deflected Trailing-Edge Flap
(The American Society of Mechanical Engineers (ASME), 2024)The aerodynamics and flowfield of a rectangular semiwing equipped with four four-bladed propellers and a 40%-chord full-span plain trailing-edge flap were investigated by using force balance and particle image velocimetry ... -
Energy Contribution Study of Blade Cavitation Control by Obstacles in a Waterjet Pump Based on mPOD and EEMD
(The American Society of Mechanical Engineers (ASME), 2024)It has been confirmed that the passive obstacles would substantially depress the leading-edge cavitation in a waterjet pump. Combined with the experiments and numerical simulations, this work revisits blade cavitation ...