Numerical Investigation of an Unsteady Blade Surface Blowing Method to Reduce Rotor Blade-Vortex Interaction Noise

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/ijae/volume-2022/9647206/figures/9647206.fig.0015a.svgz" name="9647206.fig.0015a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Baseline</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/ijae/volume-2022/9647206/figures/9647206.fig.0015b.svgz" name="9647206.fig.0015b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Steady blowing</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/ijae/volume-2022/9647206/figures/9647206.fig.0015c.svgz" name="9647206.fig.0015c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Unsteady blowing</td></tr></table>

<div>SPL contours on a hemispherical surface (3.44 R from the rotor hub) for steady/unsteady blowing cases.</div>

International Journal of Aerospace Engineering

fig15

Figure 15

Figure 15: Numerical Investigation of an Unsteady Blade Surface Blowing Method to Reduce Rotor Blade-Vortex Interaction Noise 