about theta angle in bladegen

xyq916 · May 5, 2015, 21:55

i am a newer to bladegen, i cannot understand what is the theta angle. i am totally confused. can you help me? thanks!

Jiricbeng · June 10, 2015, 07:55

Let say you have a guide vane of the turbine in xy plane. Z is axis of rotation. The leading edge and trailing edge (LE and TE) are defined by the line in zx plane and by the theta angle (and can also be defined by beta angle). Theta determines a line from x+ axis (it is like polar coordinates). Theta is the angle between a line and x+ axis. For example if the turbine guide vane LE has theta 0°, the point of LE lies on x axis, if 90° it lies on y axis.

May 5, 2015, 21:55	about theta angle in bladegen	#1
xyq916 New Member Bruce Xiao Join Date: Jan 2015 Posts: 26 Rep Power: 11	i am a newer to bladegen, i cannot understand what is the theta angle. i am totally confused. can you help me? thanks!

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June 10, 2015, 07:55		#2
Jiricbeng Senior Member Jiri Join Date: Mar 2014 Posts: 221 Rep Power: 13	Let say you have a guide vane of the turbine in xy plane. Z is axis of rotation. The leading edge and trailing edge (LE and TE) are defined by the line in zx plane and by the theta angle (and can also be defined by beta angle). Theta determines a line from x+ axis (it is like polar coordinates). Theta is the angle between a line and x+ axis. For example if the turbine guide vane LE has theta 0°, the point of LE lies on x axis, if 90° it lies on y axis.