Question

The compression of the charge entering the cells of the impeller depends upon the centrifugal force effect which decreases with the square of the rotational speed of the impeller wheel.

(a) True

(b) False

The question was asked in examination.

Asked question is from Turbocharging topic in portion Supercharging of IC Engine

Answer 1

Answer: (b) False

Explanation: The compression of the charge entering the cells of the impeller depends on the centrifugal force effect, but it increases with the square of the rotational speed of the impeller wheel, not decreases. As the impeller speed increases, the centrifugal force acting on the air or charge increases, which helps compress the charge more efficiently before it is discharged into the engine's intake manifold. Therefore, the statement that it decreases with the square of the rotational speed is incorrect.