| Autor: |
Narasimalu Srikanth, M. Mohan Ram Surya, Ravali Kethala, P. Mohan Kumar |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
2017 3rd International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET). |
| DOI: |
10.1109/pgsret.2017.8251815 |
| Popis: |
The objective of the present study is to improve the starting capability of the Darrieus vertical axis wind turbine, by employing a notched airfoil (KF-N-21). The new airfoil was derived from NACA 0021 symmetrical airfoil with a backward facing step on the suction side of the airfoil. The motivation behind the introduction of abrupt step is to trap vortex at high incidence angle similar to Kline-Fogglemann (KF) airfoil. Added advantage is the enhancement of starting torque by reverse drag by the step. The Darrieus turbine with KF-N-21 airfoil and NACA 0021 airfoil are experimentally compared in terms of static torque and power co-efficient. The KF-N-21 airfoil demonstrates higher efficiency than NACA 0021 at low Reynold's number with better starting characteristics and matched performance at higher Reynold's number. The Darrieus Turbine with KF-N-21 airfoil will be a promising candidate especially for low wind speed sites. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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