Cp is increasing with increase in TSR and never decrease in 2D Unsteady analysis -- CFD Online Discussion Forums

October 12, 2017, 02:27	Cp is increasing with increase in TSR and never decrease in 2D Unsteady analysis	#1
HUSSAIN MAZARBHUIYA New Member Join Date: Oct 2017 Posts: 2 Rep Power: 0	Dear friends, I am trying to simulate 3 bladed H-Darrieus VAWT rotor considering 2D unsteady analysis using fluent. Rotor details are in below: airfoil chord length=5 cm rotor diameter=50cm rotor height=50 cm wind speed=6.0 m/s when i was calculating Cp from Cm values for each angular velocity, i found that Cp was increasing with increase in TSR and never decrease after the pick value of Cp. which was not the actual trend of Cp vs TSR graph for VAWT rotor. Can anyone detect where i am doing wrong. Please give necessary information and help me to solve the issue. Thanks.

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