Journal of Fluids Engineering: Recent submissions
Now showing items 581-600 of 9024
-
Enhanced Longitudinal Heat Transfer in Oscillatory Channel Flow—A Theoretical Perspective
(The American Society of Mechanical Engineers (ASME), 2021)Enhanced longitudinal heat transfer in viscous, laminar, single-phase, oscillatory channel flow is investigated in this paper. Kurzweg (ASME J. Heat Transfer-Trans. ASME. 107, 1985) analyzed this case theoretically and ... -
Definition and Validation of Cavitating Rocket Turbopump Transmission Matrices for Modular Multi Actuator Disk Approach
(The American Society of Mechanical Engineers (ASME), 2021)Cavitation-induced instabilities are a critical issue to face in the design process of rocket turbopumps, and reduced-order linear methods still represent a powerful tool to evaluate their onset. The modular multi-actuator ... -
Investigation of Flow Structure in a Narrow Clearance of a Low Specific Speed Centrifugal Impeller
(The American Society of Mechanical Engineers (ASME), 2021)The disk friction loss is remarkably large in low specific speed centrifugal pumps, and an effective reduction method has not been established. Therefore, to develop the method, the loss mechanism was investigated. To grasp ... -
Sloshing of Fluid Between Rotating Inner Vertical Shaft and Stationary Outer Casing
(The American Society of Mechanical Engineers (ASME), 2021)Unsteady behaviors of free surface around a rotating vertical shaft in cylindrical stationary casing were investigated. Experiments were carried out with various rotating frequency of the shaft at two initial water levels. ... -
Effects of Plate Edge Thickness on Droplet Generation Caused by Water Film Breakup at the Plate Edge
(The American Society of Mechanical Engineers (ASME), 2021)Droplets generated at trailing edges of low-pressure steam turbines strike the leading edge of moving blades, resulting in severe damage by erosion. Although the trailing edges of stationary blades employed in the steam ... -
Isentropic Compressor Efficiency Calculation Method for Small Gasoline Engine Turbocharger Using Supplier Performance Maps
(The American Society of Mechanical Engineers (ASME), 2021)A turbocharger efficiency performance map given by the supplier is calculated using adiabatic flow equations and nonadiabatic experimental data. The experimental data used for this calculation are measured in hot gas stand ... -
Performance Improvement of Cross-Flow Turbine With a Cylindrical Cavity and Guide Wall
(The American Society of Mechanical Engineers (ASME), 2021)The cross-flow turbine has been utilizing to develop small hydropower less than about 500 kW in the world. The turbine cost is lower than the other turbines because of its smaller number of assembled parts and more ... -
Experimental Study on Temperature Change by Cavitation Accompanying Self-Pressurization of Propellant for Small Rocket Engines
(The American Society of Mechanical Engineers (ASME), 2021)As a propellant for hybrid rocket engines using liquid oxidizer and solid fuel and for liquid rocket engines, the use of self-pressurized fluids such as nitrous oxide has become widespread. Since these fluids can be ... -
Experimental Investigation on Cavity Pressure Inside Sheet Cavitation
(The American Society of Mechanical Engineers (ASME), 2021)The gas content is one of the important factors in cavitation, which may increase the pressure inside the cavity through the diffusive mass transfer of the dissolved gas into the cavity. In the present study, we try to ... -
High-Resolution 2.5D Particle Image Velocimetry Measurements of the Flow Fields Generated by Small Fans
(The American Society of Mechanical Engineers (ASME), 2021)The free jets of an axial and a centrifugal fan have been scanned by a specialized particle image velocimetry (PIV) setup, which allows for volumetric scans of the time-averaged velocity field. Both of these fans have ... -
18th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC18)
(The American Society of Mechanical Engineers (ASME), 2021)Rotating machinery plays a preponderant role in most of the industrial sectors, including, but not limited to, energy production and storage, automobile, maritime transport, aviation, and aerospace. Since the first development ... -
On the Disappearance of the Steady Wake Region Behind Porous Objects Under Freestream Flow at Low Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2021)A solid bluff object produces a recirculating wake region immediately behind it when subjected to flow separation under a steady flow condition. Similar phenomena can also be observed for a porous body. However, unlike the ... -
Deposition Process and Equivalent Markov Motion of High-Inertia Particles in a Long Straight Pipeline
(The American Society of Mechanical Engineers (ASME), 2021)Two methods are used to study the process of particle deposition in a turbulent pipe flow. The Monte Carlo method tracks 10,000 particles in the turbulent pipe flow to reproduce the deposition process of the particles. The ... -
Analysis of Gas–Liquid–Solid Three-Phase Flows in Hydrocyclones Through a Coupled Method of Volume of Fluid and Discrete Element Model
(The American Society of Mechanical Engineers (ASME), 2021)Liquid–gas–solid three-phase flows in hydrocyclones are studied numerically in this paper by employing a coupled method of the volume of fluid (VOF) and discrete element model (DEM) with Reynolds stress model (RSM) turbulence ... -
Thermodynamic Effects on Pressure Fluctuations of a Liquid Oxygen Turbopump
(The American Society of Mechanical Engineers (ASME), 2021)Liquid oxygen turbopumps are an important component of rocket engines. The instability induced by cavitation flow in turbopumps has received considerable attention because of thermodynamic effects. In this study, unsteady ... -
Flow Characterization of Bluff Bodies: A Two-Dimensional Transformation From Square to Triangular Cylinder
(The American Society of Mechanical Engineers (ASME), 2021)In this study, two-dimensional unsteady, incompressible flow around a square body that is being transformed into a vertex oriented toward the flow configuration of a triangular body is numerically investigated at Re =100 ... -
Effect of Compressibility on Velocity Profile and Friction Factor of Gaseous Laminar Flows in a Microtube
(The American Society of Mechanical Engineers (ASME), 2021)Laminar flow of nitrogen gas in a microtube was simulated numerically to obtain velocity profile and Fanning friction factor in a quasi-fully developed region. The numerical procedure based on arbitrary-Lagrangian–Eulerian ... -
Control of Mass Flow-Rate of Viscoelastic Fluids Through Time-Periodic Electro-Osmotic Flows in a Microchannel
(The American Society of Mechanical Engineers (ASME), 2021)In the present research, we address the implications of the pulsating electric field on controlling mass flow rate characteristics for the time-periodic electro-osmotic flow of a viscoelastic fluid through a microchannel. ... -
Effects of Blade Pressure Side Modification on Unsteady Pressure Pulsation and Flow Structures in a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2021)In this paper, the effects of modifying the blade pressure side (PS) on unsteady pressure pulsation and flow structures in a low specific speed centrifugal pump are carried out by experimental and computational fluid ... -
Numerical Investigation on the Influences of Boundary Layer Ingestion on Tip Leakage Flow Structures and Losses in a Transonic Axial-Flow Fan
(The American Society of Mechanical Engineers (ASME), 2021)In a boundary layer ingesting (BLI) propulsion system, the fan is continuously exposed to inflow distortions. The distorted inflows lead to nonuniform loss distributions along the radial and circumferential directions. ...