Current wind angle calculations bypass the downstream streamtubes for 90 degree flow causing artificially increased loads. While conservative, this may be significant, as recent torque paper on VAWT design load cases using the code saw loads associated with direction change with gust appreciably higher than gust alone. A possible fix is to numerically track the predominant wind direction, or maybe just output and error message if that predominant wind direction is too great and tell users to switch to the AC or OLAF models.
Current wind angle calculations bypass the downstream streamtubes for 90 degree flow causing artificially increased loads. While conservative, this may be significant, as recent torque paper on VAWT design load cases using the code saw loads associated with direction change with gust appreciably higher than gust alone. A possible fix is to numerically track the predominant wind direction, or maybe just output and error message if that predominant wind direction is too great and tell users to switch to the AC or OLAF models.