Journal of Fluids Engineering: Recent submissions
Now showing items 1021-1040 of 9024
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Numerical Investigation of Flow in a Runner of Low-Head Bulb Turbine and Correlation With Particle Image Velocimetry and Laser Doppler Velocimetry Measurements
(The American Society of Mechanical Engineers (ASME), 2019)It is a well-known fact and a much studied problematic that the performance of low-head hydraulic turbines is highly dependent on the runner–draft tube coupling. Around the optimal operating conditions, the efficiency of ... -
Flow Over the Tip Region of a Flexible Cantilever Wing With the Effect of Angle of Attack
(The American Society of Mechanical Engineers (ASME), 2019)The investigation focused on the conversions of flow structures with a change in angle of attack (AOA) for a flexible cantilever wing, which experienced a self-excited vibration. Stereoscopic particle imaging velocimetry ... -
Early Time Evolution of Circumferential Perturbation of Initial Particle Volume Fraction in Explosive Cylindrical Multiphase Dispersion
(The American Society of Mechanical Engineers (ASME), 2019)When an annular bed of solid particles that surrounds a cylindrical high-energy explosive core gets radially dispersed after detonation, the expanding front of particles undergoes instabilities. One of the possible causes ... -
Theoretical Analysis of Computational Fluid Dynamics–Discrete Element Method Mathematical Model Solution Change With Varying Computational Cell Size
(The American Society of Mechanical Engineers (ASME), 2019)Successful verification and validation is crucial to build confidence in the application of coupled computational fluid dynamics–discrete element method (CFD–DEM). Model verification includes ensuring a mesh-independent ... -
Lattice Boltzmann Simulation of Micro Gas Flows Over a Wide Range of Knudsen Numbers
(The American Society of Mechanical Engineers (ASME), 2019)To characterize the microflow over a larger range of Knudsen numbers, an improved kinetic equation considering the volume diffusion effect for nonideal gases was presented based on Klimontovich's kinetic equation and Enskog ... -
Gas-Induced Motion of a Piston in a Vibrated Liquid-Filled Housing
(The American Society of Mechanical Engineers (ASME), 2019)Models and experiments are developed to investigate how a small amount of gas can cause large rectified motion of a piston in a vibrated liquid-filled housing when piston drag depends on piston position so that damping is ... -
Cavitation in Transient Flows Through a Micro-Nozzle
(The American Society of Mechanical Engineers (ASME), 2019)High cavitating or supercavitating flows in fuel injector systems are crucial since they improve the mixing and the fuel atomization into combustion chambers, decreasing both fuel consumption and pollutant emissions. ... -
A Kriging Surrogate Model for Computing Gas Mixture Equations of State
(The American Society of Mechanical Engineers (ASME), 2019)Accurate simulation of the complex flow following the detonation of an explosive material is a challenging problem. In these flows, the detonation products of the explosive must be treated as a real gas while the surrounding ... -
Numerical Analysis of the Deterministic Stresses Associated to Impeller-Tongue Interactions in a Single Volute Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2019)In this paper, a deterministic stress decomposition is applied over the numerical three-dimensional flow solution available for a single volute centrifugal pump. The numerical model has proven in previous publications its ... -
Assessment of Computational Fluid Dynamics Capabilities for the Prediction of Three-Dimensional Separated Flows: The DELFT 372 Catamaran in Static Drift Conditions
(The American Society of Mechanical Engineers (ASME), 2019)In this paper, capabilities of state-of-the-art computational fluid dynamics (CFD) tools in the prediction of the flow-field around a multihull catamaran advancing in straight ahead motion at nonzero drift angles are ... -
Parametric Study of the Frequency of Bubble Formation at a Single Orifice With Liquid Cross-Flow
(The American Society of Mechanical Engineers (ASME), 2019)The bubble formation frequency from a single-orifice nozzle subjected to the effects of a crossflowing liquid was investigated using high-speed shadowgraphy, combined with image analysis and signal processing techniques. ... -
Research on Improving the Dynamic Performance of Centrifugal Pumps With Twisted Gap Drainage Blades
(The American Society of Mechanical Engineers (ASME), 2019)Through numerical simulation and experiments analysis, it is indicated that the hydraulic and anticavitation performance of a centrifugal pump with twisted gap drainage blades based on flow control theory can be significantly ... -
Visualization of Rotating Cavitation Oscillation Mechanism in a Turbopump Inducer
(The American Society of Mechanical Engineers (ASME), 2019)An experimental investigation has been conducted on rotating cavitation in a turbopump inducer. Previous research suggested that incidence angle variation leads to rotating cavitation. This study, using particle image ... -
Fully Coupled Smoothed Particle Hydrodynamics-Finite Element Method Approach for Fluid–Structure Interaction Problems With Large Deflections
(The American Society of Mechanical Engineers (ASME), 2019)In this study, a combination of the smoothed particle hydrodynamics (SPH) and finite element method (FEM) solving the complex problem of interaction between fluid with free surface and an elastic structure is studied. A ... -
Spatial–Temporal Evolution of Tip Leakage Vortex in a Mixed-Flow Pump With Tip Clearance
(The American Society of Mechanical Engineers (ASME), 2019)Tip clearance in pump induces tip leakage vortex (TLV), which interacts with the main flow and leads to instability of flow pattern and decrease of pump performance. In this work, the characteristics of TLV in a mixed-flow ... -
In Situ Verification of Numerical Model of Water Hammer in Slurries
(The American Society of Mechanical Engineers (ASME), 2019)This paper presents a numerical model of transient flow in a pressure slurry pipeline network with verification based on in situ measurements. The model, primarily verified in laboratory conditions, has been extended and ... -
Characteristics of Spray Atomization for Liquid Droplets Formed Using a Rotary Bell Atomizer
(The 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 ... -
Effect of Inlet Structures on the Performance of Oil Supply System of a Variable Speed Rotary Compressor
(The American Society of Mechanical Engineers (ASME), 2019)Variable speed rotary compressors are now increasingly favored in the market of household air-conditioners in China due to its advantage of energy saving and system stability. Oil supply system plays a pivotal role in high ... -
Experimental and Numerical Characterization of Drop Impact on a Hydrophobic Cylinder
(The American Society of Mechanical Engineers (ASME), 2019)In this paper, the impact of distilled water drops on hydrophobic cylinders is characterized using both experiments and numerical simulations. Water drops of 2.54 mm in diameter impact with a velocity of 1 m/s on hydrophobic ... -
No-Load Stability Analysis of Pump Turbine at Startup-Grid Integration Process
(The American Society of Mechanical Engineers (ASME), 2019)This paper focuses on no-load stability during startup-grid integration process. First, no-load operating dynamic character under startup-grid integration process is studied by bifurcation diagram, based on a classical ...