Numerical Investigation of Galloping Instabilities in Z-Shaped Profiles

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td align="left"><span style="width: 50.5625px;"><svg height="13.1375" id="M192" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 50.5625 13.1375" width="50.5625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg></span></td><td align="center">Comp. time (h)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td align="left">Experimental</td><td align="center">1.14</td><td align="center">0.7155</td><td align="center">—</td></tr><tr><td align="left">Steady</td><td align="center">0.755</td><td align="center">0.584</td><td align="center">1.1</td></tr><tr><td align="left">Unsteady</td><td align="center">1.108</td><td align="center">0.728</td><td align="center">23.8</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Comparison between RANS, URANS, and experimental values of <svg height="11.9625" id="M189" style="vertical-align:-3.22282pt" version="1.1" viewbox="0 0 10.85 11.9625" width="10.85" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,-0,0,-.012,6.962,11.762)"><path d="M238 681l-124 -585q-7 -31 4 -31q10 0 37.5 18.5t49.5 41.5l16 -22q-40 -48 -89.5 -81.5t-76.5 -33.5q-42 0 -16 122l105 488q7 32 0 41t-39 9h-35l5 26q35 3 71 13t58 17.5t26 7.5q14 0 8 -31z" id="x1D459"></path></g>
</svg>, <svg height="11.9625" id="M190" style="vertical-align:-3.24037pt" version="1.1" viewbox="0 0 14.25 11.9625" width="14.25" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,-0,0,-.012,6.962,11.762)"><path d="M530 686q-79 -330 -126 -595q-5 -24 4 -24q22 0 77 53l16 -24q-42 -49 -88 -78.5t-72 -29.5q-37 0 -19 83l21 99h-2q-62 -83 -153 -141q-65 -41 -97 -41q-28 0 -48 31.5t-20 91.5q0 71 32.5 144t88.5 118q36 30 94 52.5t94 22.5q38 0 68 -13l29 158q7 40 2 47.5t-38 7.5
h-35l1 26q39 4 76 13.5t58.5 17t27.5 7.5q16 0 9 -26zM387 375q-11 11 -38.5 20t-51.5 9q-45 0 -79 -23q-46 -32 -77.5 -107.5t-31.5 -143.5q0 -40 9.5 -58.5t23.5 -18.5q40 0 113.5 70t99.5 118z" id="x1D451"></path></g>
</svg> and the computational time for the angle of attack <svg height="13.1375" id="M191" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 50.5625 13.1375" width="50.5625" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>.

The Scientific World Journal

tab4

Table 4

Table 4: Numerical Investigation of Galloping Instabilities in Z-Shaped Profiles 