Still, many scientists and engineering professionals are busy in developing improved types of impulse turbine. Some of them got success in developing a new one but these improved turbines are not having practical importance due to many reasons.
So, Here is the List of Different Impulse Turbine
Girard Impulse Turbine
In a Girard Turbine, the direction of flow of water is parallel to the axis of the wheel. The guide vanes allow the water to impact through two diametrically opposite quadrants. To generate large power under low water head, Girard Turbine is used. In the case of low heads, the turbine wheel is kept horizontal and for larger heads, the wheel is kept vertical.
Turgo Impulse Turbine
In this turbine also, the flow of water is kept parallel to the axis of the wheel as of Girard Turbine and used one or two nozzles as like Pelton Wheel. In Turgo turbine, the jet of water strikes buckets at one end and leaves at the other end. While in Pelton wheel it strikes at the center of the bucket. The flow of water is regulated by a spear. For the same jet diameter and discharge, the diameter of Turgo turbine is much less than that of Pelton Wheel. But its peripheral speed is higher than that of Pelton Wheel.
Banki Impulse Turbine