Tip speed ratio is the tip speed of your wind turbine blade compared to the wind speed. A TSR (tip speed ratio) of 6 means that the tip speed will be 6 times faster than the wind speed. To calculate TSR of your blade draw the blades tip profile to scale on paper at the proper pitch in which the blade flies. Measure the distance that the wind would have to travel to completely pass the blade. This is where the wind would hit the forward most point (on the front or the surface facing the incoming wind) to the back most point. Compare this length the distance the blade travels from the leading edge to the trailing edge as the blade passes by a point in space. This is not always the cord length. A blade that has a steeper pitch will have a shorter distance of travel. If the distance the blade travels is 6 times the distance the wind travels then the TSR is 6.
This is only a geometric calculation. It does not take into account the lift characteristics of the profile. A high lift profile will have the benefits of a higher TSR. Thanks for stopping by, David Moller