Journal of Fluids Engineering: Recent submissions
Now showing items 181-200 of 8892
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Simulating the Effect of Electric Bias Voltages on the Electrical Characteristics of Oxyfuel Preheat Flame Using Reduced Combustion Mechanism1
(The American Society of Mechanical Engineers (ASME), 8/8/2023 1)A three-dimensional computational model is presented in this paper that illustrates the detailed electrical characteristics, and the current–voltage (i–v) relationship throughout the preheating process of premixed ... -
Structure Optimization and Cooling Performance of a Heat Sink With Discontinuous Triangular Ribs Impacted by Hybrid Nanofluid Confined Slot Jet Impingement
(The American Society of Mechanical Engineers (ASME), 8/4/2023 1)Due to the increased use of high heat flux electronic equipment, improving the heat transfer capacity and surface temperature uniformity of heat sinks have become a major concern. In this study, a novel confined slot jet ... -
Mitigation of the Pressure Pulsations in an Axial Turbine at Speed-No-Load With Independent Guide Vanes Opening
(The American Society of Mechanical Engineers (ASME), 7/26/2023 )Hydraulic turbines are operated more frequently at no-load conditions, also known as speed-no-load (SNL), to provide a spinning reserve that can rapidly connect to the electrical grid. As intermittent energy sources gain ... -
Experimental Study of Characteristics of Boundary Layer Flows With Pressure Shielding
(The American Society of Mechanical Engineers (ASME), 7/21/2023 )In this study, boundary layer flows over a flat plate with a canopy of an array of rods are experimentally investigated with particle image velocimetry (PIV) measurements. The experiments were carried out in a liquid tunnel, ... -
Investigations of Spoilers to Mitigate Columnar Vortices in Propeller Turbines at Speed-No-Load Based on Steady and Unsteady Flow Simulations
(The American Society of Mechanical Engineers (ASME), 7/21/2023 )With the introduction of an ever-larger share of renewable but intermittent energy sources on electrical grids, hydraulic turbines are more often used as network stabilizers. In such a role, they are generally operated in ... -
The Similarity Law of Cavitation Number on Cavitation Instability in Liquid Rocket Inducer
(The American Society of Mechanical Engineers (ASME), 7/17/2023 )The influence of inducer rotation speed on the propagation characteristics of rotating cavitation and on the unsteady characteristics of cavitation in rotating cavitation and cavitation surge were examined using a three-bladed ... -
Simulative Quantification of the Supersonic Discharge Process of Cold Gas Airbag Inflators
(The American Society of Mechanical Engineers (ASME), 6/7/2023 1)A simulative method for quantifying the discharge process of cold gas airbag inflators is presented. The pressure, mass flow and the influences of the flow field are relevant to a robust and predictive airbag deployment. ... -
Effect of Confinement on Flow Around a Rotating Elliptic Cylinder in Laminar Flow Regime
(The American Society of Mechanical Engineers (ASME), 6/14/2023 )The flow phenomena around a rotating elliptic cylinder placed in a narrow channel is studied numerically. The walls of the channel act as a confinement that limits the flow in the transverse direction. The confinement ratio ... -
Relaxation Fluidic Oscillators: Design Parameters, New Operating Modes, and Characteristics of Their Internal and External Flows
(The American Society of Mechanical Engineers (ASME), 6/14/2023 )Fluidic oscillators are no-moving-part actuators that can be used to produce pulsating jets. The characteristics of these devices and of the flow fields they produce are of particular interest in the field of heat transfer, ... -
Experimental and Numerical Evaluation of Affinity Law of Single-Stage and Multistage Side Channel Pumps at Variable Rotating Speeds
(The American Society of Mechanical Engineers (ASME), 6/14/2023 )In the actual operation of pumps, regulating the rotating speed of the pump based on the affinity law through variable speed drives is deemed as a prudent and convenient approach to mitigate energy loss. However, the ... -
An Assessment of Second Moment Closure Modeling for Stratified Wakes Using Direct Numerical Simulations Ensembles
(The American Society of Mechanical Engineers (ASME), 6/6/2023 1)Buoyant wakes encountered in the ocean environment are characterized by high Reynolds (Re) and Froude (Fr) numbers, leading to significant space–time resolution requirements for turbulence resolving CFD models (i.e., direct ... -
Establishment of Prediction Model for Cavitation Surge Frequency and Onset in an Inducer Considering Dynamic Characteristics of Cavitation Compliance and Mass Flow Gain Factor
(The American Society of Mechanical Engineers (ASME), 5/15/2023 )An accurate prediction method of cavitation surge is desired to design a reliable turbopump for rocket engines that allow complex operational sequences such as controlled reentry and landing. Therefore, the paper aims to ... -
Magneto-Convective Transport of Immiscible Binary Fluids in Inclined Channel
(The American Society of Mechanical Engineers (ASME), 6/6/2023 1)This work theoretically investigates the interfacial transport of immiscible fluid layers in an inclined fluidic channel in the presence of magnetofluidic actuation. Immiscible binary system consists of both non-Newtonian ... -
Suppression of Wave Instability in a Liquid Film Flow Down a Non-Uniformly Heated Slippery Inclined Plane Using Odd Viscosity
(The American Society of Mechanical Engineers (ASME), 6/6/2023 1)We study the effects of odd viscosity on the stability of a thin Newtonian liquid film flowing down a nonuniformly heated plane under a slip boundary condition. The effect of odd viscosity arises in classical fluids when ... -
Numerical Investigation of Parameters Affecting Energy Losses in Multi-Stage Perforated Plates
(The American Society of Mechanical Engineers (ASME), 5/15/2023 )Perforated plates are commonly used for flow control in pressurized systems. In different industrial applications, these devices are also used in series (multistage perforated plates) to manage high-pressure drop or reduce ... -
A Compressible, Coupled Three-Dimensional/One-Dimensional Flow Solution Method for the Seamless Simulation of Centrifugal Pumps and Their Piping
(The American Society of Mechanical Engineers (ASME), 5/15/2023 )A compressible finite volume Navier–Stokes flow solver is coupled to a method of characteristics for the seamless turbulent flow simulation of entire pump systems. For the pump, three-dimensional (3D) simulations including ... -
Analysis on the Mechanism of Rotating Stall Inner a Pump Turbine in Pump Mode Based on the Proper Orthogonal Decomposition
(The American Society of Mechanical Engineers (ASME), 5/15/2023 )An in-depth understanding of stall behavior is essential to improve the safe and stable operation of the pump turbine. In this research, the detached eddy simulation (DES) is used to investigate the various characteristics ... -
Dynamic Transition of Unsteady Supersonic Flow From Mach to Regular Reflection Over a Moving Wedge
(The American Society of Mechanical Engineers (ASME), 5/15/2023 )The design of supersonic and hypersonic air-breathing vehicles is influenced by the transition between the Mach reflection (MR) and regular reflection (RR) phenomena. The purpose of this study is to investigate the dynamic ... -
Characterization of Two-Phase Wakes in an Upward Adiabatic Liquid-Gas Flow Around a Cylinder
(The American Society of Mechanical Engineers (ASME), 3/30/2023 )Two-phase wakes generated from a cylinder in a crossflow were experimentally studied. A water–air mixture traveled through a vertical water channel with a rectangular cross section, in which a cylinder was installed ... -
Experimental Study of Turbulence Response in a Slowly Accelerating Turbulent Channel Flow
(The American Society of Mechanical Engineers (ASME), 4/3/2023 1)An investigation of flow acceleration from initial statistically steady turbulent flow to final statistically steady turbulent flow is conducted experimentally using particle image velocimetry (PIV) and constant temperature ...