{"id":167044,"date":"2022-03-07T06:12:43","date_gmt":"2022-03-07T06:12:43","guid":{"rendered":"\/forum\/forums\/topic\/horizontal-axis-turbine-blade-analysis-issues\/"},"modified":"2022-03-07T11:34:59","modified_gmt":"2022-03-07T11:34:59","slug":"horizontal-axis-turbine-blade-analysis-issues","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/horizontal-axis-turbine-blade-analysis-issues\/","title":{"rendered":"Horizontal Axis Turbine Blade analysis issues"},"content":{"rendered":"
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I wanted to mesh a NREL Phase VI Turbine Blade (with a slot) in ANSYS meshing and according to the reference article and my understanding it is vital to have inflation layers. However when I try that, low quality, highly skewed elements are created which obviously lead to inaccurate results and in my case, divergence. So I tried with a simple tet mesh, and am adapting the mesh every 3-4k iterations according to y+.<\/p>\n

The quantity I am interested in is the torque generated, therefore I am looking at the moment about rotation axis and it is nowhere near the expected value (I am getting much lesser values) . Moreover, the torque values are decreasing as I keep adapting the mesh (I expected it to get closer to the expected value). Also, the decrease is quite significant (110 Nm to 90 Nm after adapting it the 4th time). The drag value (in direction of the rotational axis) also changes but not as much.<\/p>\n

Why is this happening? Is it due to the simple tet mesh? In that case how do I create an inflation layer without increasing skewness? My analysis is to gauge the effectiveness of a slot for boundary layer control to increase torque on the blade. I am using the SST k-omega model with a rotating frame(moving reference frame). Additionally, I do not have ICEM CFD (which most sources on the internet have used to mesh the same geometry).<\/p>\n","protected":false},"template":"","class_list":["post-167044","topic","type-topic","status-closed","hentry","topic-tag-fluent","topic-tag-inflation-layers","topic-tag-meshing","topic-tag-torque","topic-tag-wind-turbine"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t