Vortex Shedding Lock-In due to Pitching Oscillation of a Wind Turbine Blade Section at High Angles of Attack

<div>Comparison of predicted lock-in boundaries for a circular cylinder: <span class="nowrap"><svg height="7.35473pt" id="M157" style="vertical-align:-0.3499303pt" version="1.1" viewbox="-0.0498162 -7.0048 7.75925 7.35473" width="7.75925pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M552 -3V513H36V-3H552ZM494 47H94V463H494V47Z"></path></g></svg>,</span> upper boundary (current implementation); <span class="nowrap"><svg height="8.8423pt" id="M158" style="vertical-align:-0.2064009pt" version="1.1" viewbox="-0.0498162 -8.6359 8.46388 8.8423" width="8.46388pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M599 626V650H42V626L303 -15L331 -7L599 626ZM535 600L339 111L145 600H535Z"></path></g></svg>,</span> lower boundary (current implementation); lock-in region (current implementation) (in green) and [<a href="/journals/ijae/2019/6919505/#B32">32</a>] (in black line).</div>

International Journal of Aerospace Engineering

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Figure 10

Figure 10: Vortex Shedding Lock-In due to Pitching Oscillation of a Wind Turbine Blade Section at High Angles of Attack 