The critical speed of a turbine is the rotational speed at which the turbine experiences resonance and can lead to catastrophic failure.

• Critical speed is the speed at which the natural frequency of th...read more

Every machine have a frequency and when turbine rolling and at a speed both frequency and vibration and stable (turbine rotor frequency and turbine casing frequency and vibration ) are same then its c...read more

At 40 to 50% of the normal running speed while starting

When we start Turbine rolling.. At a certain speed there is so much vibration on the Turbine parts. We should avoid running turbine long time at that speed. Thats speed called criticle speed orlf turb...read more