Journal of Fluids Engineering: Recent submissions
Now showing items 941-960 of 9024
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Calculation of Stall Margin Enhancement With Micro-Tip Injection in an Axial Compressor
(American Society of Mechanical Engineers (ASME), 2019)Although steady micro-injection is experimentally validated as an attractive method in improving the stall margin of axial compressors, up to now a fast prediction of stall boundary remains some way off. This investigation ... -
Characteristics of Spray Atomization for Liquid Droplets Formed Using a Rotary Bell Atomizer
(American Society of Mechanical Engineers (ASME), 2019)In automotive engineering, paint evaporation is considered one of the major sources of volatile organic compound emission. The rotary bell atomizer (RBA) is a special atomizer used for improved automotive painting. A model ... -
A Transient Computational Fluid Dynamics, Phase Modulated, Multifrequency Approach for Impeller Rotordynamic Forces
(American Society of Mechanical Engineers (ASME), 2019)Modern high performance turbomachines frequently operate in supercritical condition above their first critical speed, rendering these machines prone to rotordynamic instability. The American Petroleum Institute (API) ... -
Unsteady Electrokinetic Flow in a Microcapillary: Effects of Periodic Excitation and Geometry
(American Society of Mechanical Engineers (ASME), 2019)Oscillatory electrokinetic flow is numerically examined in a rectangular annulus microtube under the influence of various wave forms. When the inner and outer walls of the capillary are oppositely charged, an instantaneous ... -
Experimental and Numerical Analysis of Different Unsteady Modes in a Centrifugal Compressor With Variable Vaned Diffuser
(American Society of Mechanical Engineers (ASME), 2019)The flow instability always varies within different compressors; however, even in one compressor, there may be still multiple various unsteady modes. To study the triggering mechanism for these unsteady modes, a detailed ... -
Evaluation of Rotor–Stator Interface Models for the Prediction of the Hydraulic and Suction Performance of a Centrifugal Pump
(American Society of Mechanical Engineers (ASME), 2019)The effects of a rotor–stator interface model on the hydraulic and suction performance of a single-stage centrifugal pump have been evaluated. A three-dimensional Reynolds-averaged Navier–Stokes (RANS) analysis was performed ... -
Numerical and Experimental Investigation on Flow Dynamics in a Pipe With an Abrupt Change in Diameter
(American Society of Mechanical Engineers (ASME), 2019)Flow dynamics in a pipe with an abrupt change in diameter was experimentally and numerically analyzed. Two-dimensional stationary Reynolds-averaged Navier–Stokes (RANS) k–ε epsilon model was used to describe the development ... -
Effects of Uncertainties in the Launch Parameters on the Pressure-Equalizing Air Film Around a Vertically Launched Underwater Vehicle
(American Society of Mechanical Engineers (ASME), 2019)Many uncertain factors in the water-emerging process of a vehicle influence the taking effect of the air film around its shoulder in the load reduction and attitude control. Assuming the launch parameters (launch depth, ... -
Transmission Line Modeling of Laminar Liquid Wave Propagation in Tapered Tubes
(American Society of Mechanical Engineers (ASME), 2019)This paper presents an improved method of time-domain modeling of pressure wave propagation through liquid media in rigid tapered pipes. The method is based on the transmission line model (TLM), which uses linear transfer ... -
A Study on Aeration to Alleviate Cavitation Erosion in the Contraction Section of Pressure Flow
(American Society of Mechanical Engineers (ASME), 2019)Pressure flow generally exists in water conservancy projects and pipelines. The flow boundary of the contraction section faces a potential risk of cavitation erosion under high velocity. However, there is a lack of effective ... -
The Influence of Cylindrical Spray Chamber Geometry on the Evolution of High Pressure Diesel Sprays
(American Society of Mechanical Engineers (ASME), 2019)While much is known on the effect of combustion chamber geometry on spray evolution in engines, less is known about its role in laboratory combustion chambers. This paper reports on a study, which investigates the effect ... -
On the Applicability of Cavitation Erosion Risk Models With a URANS Solver
(American Society of Mechanical Engineers (ASME), 2019)In the maritime industry, cavitation erosion prediction becomes more and more critical, as the requirements for more efficient propellers increase. Model testing is yet the most typical way a propeller designer can, nowadays, ... -
Flow Field Characterization and Visualization of Grid Fin Subsonic Flow
(American Society of Mechanical Engineers (ASME), 2019)Grid fins are unconventional control surfaces consisting of an outer frame supporting an inner grid of intersecting planar surfaces. Although afflicted with higher drag, these have been credited for their enhanced lifting ... -
Extending Classical Friction Loss Modeling to Predict the Viscous Performance of Pumping Devices
(American Society of Mechanical Engineers (ASME), 2019)The affinity law modified for viscosity effects is further extended to include the power input and efficiency. The power input and efficiency data generated using computational fluid dynamics (CFD) are utilized to represent ... -
A Study on the Effect of Fluid Properties and Watercut on Liquid Carry-Over in Gas-Liquid Cylindrical Cyclone Compact Separators
(American Society of Mechanical Engineers (ASME), 2019)Prediction of the operational envelope (OE-limited range of gas and liquid velocities) for liquid carry-over is essential for the optimized performance of gas-liquid cylindrical cyclone (GLCC©) compact separators. This ... -
Modeling, Simulation, and Optimization of Geological Sequestration of CO2
(American Society of Mechanical Engineers (ASME), 2019)With heightened concerns on carbon dioxide (CO2) emissions from coal power plants, there has been a major emphasis in recent years on development of safe and economical geological carbon sequestration (GCS) technology. ... -
A Systematical Study of the Influence of Blade Number on the Performance of a Side Channel Pump
(American Society of Mechanical Engineers (ASME), 2019)For side channel machines, distinction is made between side channel pumps and peripheral pumps. The blade number of side channel machines has a large influence on the performance of the pump. This is known from several ... -
Investigation of the Integrated Model of Side Chamber, Wear-Rings Clearance, and Balancing Holes for Centrifugal Pumps
(American Society of Mechanical Engineers (ASME), 2019)The characteristics of radial pressure distribution inside side chamber and leakage flow through balancing holes of centrifugal pumps are very important for accurately predicting the axial thrust produced by a balancing ... -
Power Scaling of Radial Outflow: Bernoulli Pads in Equilibrium
(American Society of Mechanical Engineers (ASME), 2019)A Bernoulli pad uses an axial jet to produce radial outflow between the pad and a proximally located parallel surface. The flow field produces a force between the surfaces, which depends upon their spacing h. The direction ... -
Vortex Pump as Turbine—A Type Turbine for Energy Generation or Recovery Based on Computational Fluid Dynamics Prediction
(American Society of Mechanical Engineers (ASME), 2019)An experimental vortex pump with a specific speed of 76 is investigated to get its performance and flow structure under noncavitation and cavitation conditions when the pump operates as turbine in the reverse direction by ...