scholarly journals Performance characterization of a wells turbine under unsteady flow conditions

2019 ◽  
Author(s):  
Marco Torresi ◽  
Michele Stefanizzi ◽  
Francesco Fornarelli ◽  
Luana Gurnari ◽  
Pasquale Giuseppe Fabio Filianoti ◽  
...  
Keyword(s):  
Unsteady Flow ◽  
Flow Conditions ◽  
Wells Turbine ◽  
Performance Characterization

Wells Turbines With 3-Dimensional Blades: The Performance Under Unsteady Flow Conditions

2015 ◽  
Author(s):  
Manabu Takao ◽  
Katsuya Takasaki ◽  
Tomohiro Tsunematsu ◽  
Miah Md. Ashraful Alam ◽  
Toshiaki Setoguchi
Keyword(s):  
Unsteady Flow ◽  
Flow Separation ◽  
Blade Profile ◽  
Wave Energy Conversion ◽  
Flow Conditions ◽  
Suction Surface ◽  
Wells Turbine ◽  
3 Dimensional ◽  
Profile Changes ◽  
The Mean

The effect of the 3-dimentional (3D) blade on the turbine characteristics of Wells turbines for wave energy conversion has been investigated numerically by a quasi-steady analysis under unsteady flow conditions in this study in order to improve the peak mean efficiency characteristics. The aim of use of the 3D blade is to prevent flow separation on the suction surface near the tip. The chord length is constant in the radius and the blade profile changes gradually from the mean radius to the tip. The proposed blade profiles in the study are NACA0015 from the hub to mean radius and NACA0025 at the tip. The performance of the Wells turbine with 3D blades has been compared with those of the original Wells turbine, i.e., the turbine with 2-dimentional blades. As a result, it was concluded that although the peak mean efficiency of a Wells turbine can be improved by the use of the proposed 3D blade, its blade does not overcome the stall characteristic.

scholarly journals Effect of Blade Profile on the Performance of Wells Turbine under Unidirectional Sinusoidal and Real Sea Flow Conditions

2007 ◽  
Vol 2007 ◽  
pp. 1-9 ◽  
Author(s):  
A. Thakker ◽  
R. Abdulhadi
Keyword(s):  
Unsteady Flow ◽  
Numerical Results ◽  
Blade Profile ◽  
Flow Conditions ◽  
Wells Turbine ◽  
Hysteretic Characteristics ◽  
The One ◽  
Good Agreement

This paper presents the effect of blade profile and rotor solidity on the performance of Wells turbine operating under unidirectional unsteady flow conditions. In the study, four kinds of blade profile were selected, that is, NACA0020, NACA0015, CA9, and HSIM 15-262123-1576. The experiments have been carried out for two solidities,σ= 0.48 andσ= 0.64, under sinusoidal and irregular unsteady flow conditions based on Irish waves (site2). As a result, it was found that the preferable rotor geometry is the one with blade profile of CA9 with solidityσ= 0.64. In addition, the effect of blade profile and rotor solidity on hysteretic characteristics of the turbine has been clarified experimentally and it was found to be in good agreement qualitatively when compared to numerical results (Setoguchi et al. (2003)).

scholarly journals Performance Characterization of Composite Powders for 3D Printing

2021 ◽  
Vol 714 (3) ◽  
pp. 032070
Author(s):  
Xiangjun Bi ◽  
Hongjie Zhao ◽  
Yuanxun Gong ◽  
Xinghong Zhou
Keyword(s):  
3D Printing ◽  
Composite Powders ◽  
Performance Characterization

Design, Installation, and Performance Characterization of a Laboratory-Scale Solar Thermal System for Experiments in Solar Energy Utilization

2012 ◽  
Author(s):  
Stephanie Drozek ◽  
Christopher Damm ◽  
Ryan Enot ◽  
Andrew Hjortland ◽  
Brandon Jackson ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Laboratory Scale ◽  
Energy Utilization ◽  
Solar Thermal ◽  
Thermal System ◽  
Performance Characterization ◽  
And Performance ◽  
Solar Thermal System

The purpose of this paper is to describe the implementation of a laboratory-scale solar thermal system for the Renewable Energy Systems Laboratory at the Milwaukee School of Engineering (MSOE). The system development began as a student senior design project where students designed and fabricated a laboratory-scale solar thermal system to complement an existing commercial solar energy system on campus. The solar thermal system is designed specifically for educating engineers. This laboratory equipment, including a solar light simulator, allows for variation of operating parameters to investigate their impact on system performance. The equipment will be utilized in two courses: Applied Thermodynamics, and Renewable Energy Utilization. During the solar thermal laboratories performed in these courses, students conduct experiments based on the American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) 93-2010 standard for testing and performance characterization of solar thermal systems. Their measurements are then used to quantify energy output, efficiency and losses of the system and subsystem components.

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