Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method

<table>Blade chordwise pressure distribution at <svg height="14.85" id="M140" style="vertical-align:-2.22495pt" version="1.1" viewbox="0 0 72.637497 14.85" width="72.637497" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.012)"><use xlink:href="#x1D45F"></use></g><g transform="matrix(.017,-0,0,-.017,7.236,12.012)"><use xlink:href="#x2F"></use></g><g transform="matrix(.017,-0,0,-.017,14.239,12.012)"><path d="M631 18l-4 -26q-24 0 -35 1q-57 3 -92.5 23t-69.5 68q-21 30 -101 160q-13 22 -30.5 31t-54.5 9h-32v-159q0 -63 14 -77.5t74 -19.5v-28h-262v28q62 5 76 19.5t14 77.5v402q0 62 -13 76t-73 19v28h248q109 0 159 -34q67 -42 67 -131q0 -115 -127 -172q27 -52 89 -144
q49 -71 81 -104q31 -36 72 -47zM212 316h48q73 0 108 29q55 42 55 124q0 76 -42 112t-104 36q-41 0 -54 -10q-11 -7 -11 -44v-247z" id="x52"></path></g><g transform="matrix(.017,-0,0,-.017,29.504,12.012)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,44.208,12.012)"><use xlink:href="#x30"></use></g><g transform="matrix(.017,-0,0,-.017,52.368,12.012)"><use xlink:href="#x2E"></use></g><g transform="matrix(.017,-0,0,-.017,56.243,12.012)"><use xlink:href="#x39"></use></g><g transform="matrix(.017,-0,0,-.017,64.403,12.012)"><use xlink:href="#x35"></use></g>
</svg> (a). Duct chordwise pressure distribution at <svg height="12.4375" id="M141" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 36.174999 12.4375" width="36.174999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><use xlink:href="#x1D703"></use></g><g transform="matrix(.017,-0,0,-.017,13.237,12.162)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,27.94,12.162)"><use xlink:href="#x30"></use></g>
</svg> degrees (b). Influence of wake model. Ka4-70 inside duct 19Am at <svg height="13.6375" id="M142" style="vertical-align:-1.97925pt" version="1.1" viewbox="0 0 47.512501 13.6375" width="47.512501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.113)"><use xlink:href="#x1D43D"></use></g><g transform="matrix(.017,-0,0,-.017,12.54,11.113)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,27.244,11.113)"><use xlink:href="#x30"></use></g><g transform="matrix(.017,-0,0,-.017,35.403,11.113)"><use xlink:href="#x2E"></use></g><g transform="matrix(.017,-0,0,-.017,39.279,11.113)"><use xlink:href="#x35"></use></g>
</svg>. Closed gap model.</table>

International Journal of Rotating Machinery

fig13

Figure 13

Figure 13: Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method 