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Cp Vs Tsr HAWT shows the same Graph with different wind speed
Quote from msy23 on 15. July 2023, 14:45Hello everyone!
I’m still a new user of Qblade. I’m trying to simulate HAWT turbine performance, When I run Rotor BEM Simulation, Cp Vs TSR Graph always show the same results for various wind speed. Is it correct results? or I made some mistakes? if I made mistake please tell me what should I do in order to make it correct simulation.
I hope my question is clear.Thank you so much!
Hello everyone!
I’m still a new user of Qblade. I’m trying to simulate HAWT turbine performance, When I run Rotor BEM Simulation, Cp Vs TSR Graph always show the same results for various wind speed. Is it correct results? or I made some mistakes? if I made mistake please tell me what should I do in order to make it correct simulation.
I hope my question is clear.
Thank you so much!
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Quote from David on 17. July 2023, 10:41Hi,
In BEM (Blade Element Momentum) simulations, both the power coefficient (CP) and the tip speed ratio (TSR) are normalized with the windspeed, which means their values remain constant regardless of changes in wind speed. However, the windspeed variations do have an impact on the Reynolds number experienced by the blades. As a result, when using blade definitions covering a range of Reynolds numbers, you will observe the influence of Reynolds number variations when changing the windspeed in BEM simulations.
BR,
David
Hi,
In BEM (Blade Element Momentum) simulations, both the power coefficient (CP) and the tip speed ratio (TSR) are normalized with the windspeed, which means their values remain constant regardless of changes in wind speed. However, the windspeed variations do have an impact on the Reynolds number experienced by the blades. As a result, when using blade definitions covering a range of Reynolds numbers, you will observe the influence of Reynolds number variations when changing the windspeed in BEM simulations.
BR,
David
![](https://qblade.org/assets/turbine_falling.gif)