Tip Speed Ratio (TSR) in flight mechanics refers to the ratio of the linear speed of a rotating element’s tip, like a propeller or rotor blade, to the oncoming airspeed. Mathematically, it is expressed as the Tip Speed divided by the Free-Stream Airspeed. TSR is crucial for optimizing the efficiency of rotating elements in aircraft, influencing factors like thrust and power generation. Achieving an optimal TSR is vital for maximizing performance and minimizing drag in propulsion systems and rotating components.
Where:
- λ is the Tip speed Ratio.
- N is the no of blades.