Abstract
This study analyzed an airfoil blade for a horizontal-axis wind turbine (HAWT) with a trailing-edge jet flow design. This design was realized by drilling a hole in the trailing edge of an NACA0018 blade of a conventional HAWT to serve as a pressure injection nozzle. Five inflow wind speeds and three trailing-edge jet flow conditions were examined in the test. The results revealed the efficiency differences between a HAWT with the new jet flow design and conventional HAWTs. The experimental methods employed involved a wind tunnel experiment and a computational fluid dynamics (CFD) simulation. The results revealed that when the inflow wind speed was low, the trailing-edge jet flow accelerated the initiation phase and increased the rotating speed of the HAWT; however, when the inflow wind speed was high, damping occurred and the rotating speed of the turbine blades decreased.
Highlights
Horizontal axis and vertical axis models constitute the two main types of wind turbine designs and can be distinguished by their appearances
Numerous variations have been developed for horizontal-axis wind turbine (HAWT) and vertical-axis wind turbines (VAWTs), and each variation exhibits strengths and weaknesses
The boundary of the simulated surface is the interface of the HAWT, and the boundary condition adjacent to the wind turbine is set as the sliding interface to generate a sliding grid system
Summary
Horizontal axis and vertical axis models constitute the two main types of wind turbine designs and can be distinguished by their appearances. HAWT blades generate a considerable antitorque force during rotation, which leads to the requirement of additional reinforcements for the tower and base structure [6]. These requirements limit the flexibility regarding turbine location and usage. For the horizontal axis wind turbine, it can accelerate the rotation to increase power output in low speed, and produce a stable anti-torque force to wind turbine in high speed. It becomes the all day long operations, to overcome the problem of reversed pressure in high speed and cut off wind speed.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
