-
1261
Effect of Blade Pitch Angle on the Aerodynamic Characteristics of a Straight-bladed Vertical Axis Wind Turbine Based on Experiments and Simulations
Published 2018-06-01“…In this paper, wind tunnel experiments and CFD simulations were performed at the Sb-VAWT to investigate the effect of different blade pitch angles on the pressure distribution on the blade surface, the torque coefficient, and the power coefficient. In this study, the airfoil type was NACA0021 with two blades. The Sb-VAWT had a rotor radius of 1.0 m with a spanwise length of 1.2 m. …”
Get full text
Article -
1262
Development of a 3D Eulerian/Lagrangian Aircraft Icing Simulation Solver Based on OpenFOAM
Published 2022-09-01“…Steady-state 3D Reynolds-averaged Navier-Stokes (RANS) equations are solved to provide the ensemble-averaged flow around the airfoil. Considering the multi-scale nature of droplet size distribution, and more importantly, to represent the less uniform nature of the Super-cooled Large Droplets (SLD), two droplet tracking methods are realized: the Eulerian method is used to track the small-size droplets (below 50 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">μ</mi></semantics></math></inline-formula>m) for the sake of efficiency; the Lagrangian method with random sampling is used to track the large droplets (above 50 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">μ</mi></semantics></math></inline-formula>m); the heat transfer of the surface overflow is solved on a virtual surface mesh; the ice accumulation is estimated via the Myers model; finally, the final ice shape is predicted by time marching. …”
Get full text
Article -
1263
Surrogate Models for Performance Prediction of Axial Compressors Using through-Flow Approach
Published 2019-12-01“…A group of experimental data considering a two-stage transonic compressor is used to generate the airfoils database for training the surrogate models. …”
Get full text
Article -
1264
Numerical investigation of sand erosion rate in a horizontal axis wind turbine
Published 2024-03-01“…Three-dimensional E216 airfoil blades of radius 0.5 m are established according to blade element momentum theory. …”
Get full text
Article -
1265
Design and Implementation of an IoT-Oriented Strain Smart Sensor with Exploratory Capabilities on Energy Harvesting and Magnetorheological Elastomer Transducers
Published 2020-06-01“…The reported experiments included cloud-computing capabilities towards a potential Internet of Things application of the smart sensor in the context of monitoring automotive-chassis vibrations and airfoil damage for further analysis and diagnostics, and in general structural-health-monitoring applications.…”
Get full text
Article -
1266
Comprehensive Analysis of the Impact of the Icing of Wind Turbine Blades on Power Loss in Cold Regions
Published 2023-05-01“…Icing has a great influence on the aerodynamic characteristics of the airfoil, leading to a significant decrease in the power curve. …”
Get full text
Article -
1267
Study on the repair parameters for trailing‐edge bonding failure of wind turbine blade in service
Published 2023-01-01“…Finally, nine different repaired trailing edge models were developed using Ansys/Fluent for each two two‐dimensional airfoil. A 30–40 m section of a 71 m blade was used to develop a three‐dimensional (3D) rotating model with the repaired trailing edge. …”
Get full text
Article -
1268
Design of Wave Glider Optimal Parameters Suitable for the Northwest Pacific Ocean, the North Indian Ocean, and the South China Sea
Published 2021-04-01“…In addition, a dynamic model was used to simulate the influence of umbilical length, airfoil, and maximum limited angle on the velocity of the Wave Glider under the five types of wave element. …”
Get full text
Article -
1269
Deep-Learning-Based Reduced-Order Model for Power Generation Capacity of Flapping Foils
Published 2023-06-01“…Here, we propose a proper orthogonal decomposition (POD)-based reduced-order model (ROM) of power generation by flapping airfoils in conjunction with deep neural networks. …”
Get full text
Article -
1270
Preliminary Concept of an Unmanned Aerial Vehicle for Patrolling of Water Basins
Published 2019-12-01“…The capability of safe emergency unpowered landing of the UAV enabled the application of an reflex airfoil based on the Kasper wing design. In the event of a propulsion power loss, the UAV could automatically begin a low advance velocity flight to reduce the risk of UAV failure upon touchdown. …”
Get full text
Article -
1271
Martian Combustion-Powered Fixed-Wing UAVs: An Introductory Investigation and Analysis
Published 2022-08-01“…As a result, this study investigates the flight of this UAV in the Martian atmosphere with the assumptions that it employs an NACA S7012 airfoil and its electric propulsion technology is replaced with a four-stroke oxy-methane fueled Saito FG-11 internal combustion engine (ICE). …”
Get full text
Article -
1272
On the Aerodynamic Analysis and Conceptual Design of Bioinspired Multi-Flapping-Wing Drones
Published 2021-07-01“…Several wing shapes and airfoils are considered, and aerodynamic simulations are conducted, to determine the optimal planform, airfoil, formation angle, and angle of attack. …”
Get full text
Article -
1273
FLOW SEPARATION OF AXIAL COMPRESSOR CASCADE BLADES
Published 2010-06-01“…The cascade was tested in an open type low-speed subsonic (Mach number=0.117) wind tunnel, for Reynolds number (Re=239605) based on maximum velocity (35 m/s) and airfoil chord length. The total and static pressures were measured in selected points between the two blades for stagger angles of (4 0 , 0 0 ,- 4 0 ,-8 0 and -120) by using a multi-tube manometer and a pitot static tube. …”
Get full text
Article -
1274
PENINGKATAN PERFORMA TURBIN ANGIN SUMBU HORISONTAL BERSUDU AIR FOIL MELALUI PENAMBAHAN NOSEL DAN DIFUSER
Published 2016-11-01“…Keywords: Wind turbine, Airfoil, Nozzle, Diffuser.…”
Get full text
Article -
1275
Analysis on fracture mechanics theory of roof cutting instability mechanism with large mining height face in shallow coal seam
Published 2023-01-01“…The necessary condition for rock beam instability was crack activation, and the sufficient condition was the airfoil branch crack propagate through the rock beam. …”
Get full text
Article -
1276
A Survey of the Quasi-3D Modeling of Wind Turbine Icing
Published 2022-11-01“…Wind turbine icing has been the subject of intensive research over the past two decades, primarily focusing on applying computational fluid dynamics (CFD) to 2D airfoil simulations for parametric analysis. As a result of blades’ airfoils deformation caused by icing, wind turbines experience a considerable decrease in aerodynamic performance resulting in a substantial loss of productivity. …”
Get full text
Article -
1277
Influence mechanism of the diameter of the energy accumulation hole on the bi-directional cumulative tension blasting
Published 2024-03-01“…When diameter exceeds 14 mm, symmetrical airfoil cracks appear in non-concentrated energy directions, with larger diameters resulting in shorter crack propagation lengths. …”
Get full text
Article -
1278
Two-Way Coupled Aero-Structural Optimization of Stable Flying Wings
Published 2023-04-01“…Different shapes are evaluated during the optimization process until the algorithm reaches the optimal wing aspect ratio, taper ratio, angle of incidence, twist angle, swept angle, and airfoil shape, where a six-parameters method is employed to allow reflex airfoils. …”
Get full text
Article -
1279
Multi-Fidelity Aerodynamic Data Fusion with a Deep Neural Network Modeling Method
Published 2020-09-01“…To test the proposed multi-fidelity aerodynamic data fusion method, we calculated Euler and Navier–Stokes simulations for a typical airfoil at various Mach numbers and angles of attack to obtain the aerodynamic coefficients as low- and high-fidelity data. …”
Get full text
Article -
1280
An experimental investigation on mechanical performances of 3D printed lightweight ABS pipes with different cellular wall thickness
Published 2021-06-01“…Also, the applications of cellular structures (or lattice structures) such as wing airfoil, tire, fiber and implant, are mainly used in aerospace, automotive, textile and biomedical industries respectively. …”
Get full text
Article