Journal of Fluids Engineering: Recent submissions
Now showing items 901-920 of 9024
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Analysis Method of Compressor Stability Based on Eigenvalue Theory
(The American Society of Mechanical Engineers (ASME), 2020)In order to analyze the flow stability of compressors rapidly in the design stage, a fast analysis method is developed in this paper. This method takes the base flow on each streamline at different spanwise locations as ... -
Stability Optimization and Analysis of a Bidirectional Shaft Extension Pump
(The American Society of Mechanical Engineers (ASME), 2020)This paper is to solve the problem of poor stability of bidirectional shaft pumps, under reverse and low-head condition. In this study, computational fluid dynamics (CFD) calculations are carried out and verified by model ... -
The Effect of Aspect Ratio on Wall Pressure Fluctuations at a Wing-Plate Junction
(The American Society of Mechanical Engineers (ASME), 2020)Measurements of the wall pressure fluctuations near a wing-plate junction were made for wings with three different aspect ratios (AR) of 0.2, 0.5, and 1.0 at several angles of attack. The chord-based Reynolds number for ... -
Numerical Simulation of Steam Flow Inside the Superheater Section of An Industrial Boiler Using a Real Gas Model
(The American Society of Mechanical Engineers (ASME), 2020)Flow mal-distribution inside manifolds hampers the overall efficiency of processes in industries. In supercritical boilers, improper flow of steam inside the superheater (SH) section is a common cause of thermal accidents. ... -
Homage to a Legendary Dynamicist on His Seventy-Fifth Birthday
(The American Society of Mechanical Engineers (ASME), 2020)Mohamed Gad-el-HakProfessor Mohamed Gad-el-Hak is an engineering scientist, globally well-known in the field of classical physics and the subfields of mechanics, biomechanics, fluid mechanics, turbulence, flow control, ... -
Sloshing in Regular Polygonal Basins—Frequencies, Modes, and Tileability
(The American Society of Mechanical Engineers (ASME), 2020)The classical theory of small amplitude shallow water waves is applied to regular polygonal basins. The natural frequencies of the basins are related to the eigenvalues of the Helmholtz equation. Exact solutions are presented ... -
Experimental Characterization of a Liquid Jet Emanating From An Effervescent Atomizer
(The American Society of Mechanical Engineers (ASME), 2020)The study focuses on experimental characterization of the primary atomization associated with an effervescent atomizer. Unlike the existing designs available in the literature that inject air perpendicular to the liquid ... -
Utilization of Zonal Method for Five-Hole Probe Measurements of Complex Axial Compressor Flows
(The American Society of Mechanical Engineers (ASME), 2020)Five-hole probe is widely used in the measurement of turbomachinery flows, but in the traditional way the measurable angle range is not big enough for some interested flows. In this paper, the zonal method is introduced ... -
Effect of URANS and Hybrid RANS-Large Eddy Simulation Turbulence Models on Unsteady Turbulent Flows Inside a Side Channel Pump
(The American Society of Mechanical Engineers (ASME), 2020)In this work, the unsteady Reynolds-averaged Navier–Stokes (URANS) and three hybrid Reynolds-averaged Navier–Stokes-large eddy simulation (RANS-LES) models are employed to resolve the vortical flows in a typical single-stage ... -
Computational Analysis of Transverse Sonic Injection in Supersonic Crossflow Using RANS Models
(The American Society of Mechanical Engineers (ASME), 2020)Transverse injection at sonic speed from a rectangular slot into a supersonic crossflow is numerically explored with an indigenously developed parallel three-dimensional (3D) Reynold-averaged Navier–Stokes (RANS) solver ... -
An Extended Eddy-Preserving Scheme for Strong Vortical Flows
(The American Society of Mechanical Engineers (ASME), 2020)The eddy-preserving limiter has been demonstrated to outperform the conventional van Albada limiter for monotone upstream-centered schemes for conservation laws (MUSCL) for vortical flows. It reduces the dissipation by ... -
Modeling Interfacial Interactions and Turbulence in the Near-Wall Region of a Vertical Bubbly Boundary Layer
(The American Society of Mechanical Engineers (ASME), 2020)A two-fluid model with second-order turbulence closure is used for the simulation of a turbulent bubbly boundary layer. The turbulence model is based on the decomposition of the Reynolds stress tensor in the liquid phase ... -
Experimental Investigation for Flow Regime Identification Using Probability Density Function of Void Fraction Signals
(The American Society of Mechanical Engineers (ASME), 2020)In this study, upward air–water two-phase flow tests were carried out in a 3 cm diameter pipe under atmospheric pressure, and over 3000 data points were collected from a wide range of superficial gas and liquid velocities ... -
Numerical Study of the Behaviors of Ventilated Supercavities in a Periodic Gust Flow
(The American Society of Mechanical Engineers (ASME), 2020)We conducted a numerical simulation of ventilated supercavitation from a forward-facing cavitator in unsteady flows generated by a gust generator under different gust angles of attack and gust frequencies. The numerical ... -
Experimental Investigation of Solid Particle Erosion in Successive Elbows in Gas Dominated Flows
(The American Society of Mechanical Engineers (ASME), 2020)When a fluid containing erosive particles flows through two or more elbows mounted in series with short distances between them, the downstream elbows which are installed after the first elbow are exposed to erosion from a ... -
Evaporation of Lubricant Films Subjected to Laminar and Turbulent Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2020)This work investigates experimentally the effects of grid-generated turbulence on the evaporation of thin oil films subjected to laminar, transitional, and turbulent boundary layers. Particle image velocimetry (PIV) is ... -
A Simple Analytical Model for Head Estimation of Noncavitating Inducers With Arbitrary Shape
(The American Society of Mechanical Engineers (ASME), 2020)Although the increase of suction performance is the primary objective when applying inducers to centrifugal pumps and the combined head of inducer and main impeller is finally to be judged, it is helpful for the designer ... -
The Effect of Scale and Working Fluid on Sweeping Jet Frequency and Oscillation Angle
(The American Society of Mechanical Engineers (ASME), 2020)This study was conducted to quantify in a controlled manner the effect of oscillator scale and working fluid on oscillator performance. The performance parameters of interest include the oscillation frequency and oscillation ... -
Multilayer Analysis of Phan-Thien-Tanner Immiscible Fluids Under Electro-Osmotic and Pressure-Driven Effects in a Slit Microchannel
(The American Society of Mechanical Engineers (ASME), 2020)Because the pumping of samples by viscous drag forces and the use of flow-focusing for several sheath flows are widely used in microfluidic devices applications, the present investigation treats about the transport of ... -
Design and Preliminary Analysis of the Variable Axisymmetric Divergent Bypass Dual Throat Nozzle
(The American Society of Mechanical Engineers (ASME), 2020)Turbofan engines with afterburners usually have variable nozzle throat area, and the nozzle throat area may increase by 50–100% during afterburning. An axisymmetric divergent bypass dual throat nozzle (ADBDTN) can offer ...