Question

What is the formula for the area of outlet opening?

(a) area of outlet opening = maximum air passing per second / 0.42 * peripheral speed

(b) area of outlet opening = maximum air passing per second * 0.42 * peripheral speed

(c) area of outlet opening = maximum air passing per second * 0.42 / peripheral speed

(d) area of outlet opening = 1/maximum air passing per second * 0.42 * peripheral speed

This question was posed to me by my college director while I was bunking the class.

The origin of the question is Design of Fan in division Aspects of Design of Mechanical Parts of Design of Electrical Machines

Answer 1

Correct option is (a) area of outlet opening = maximum air passing per second / 0.42 * peripheral speed

Best explanation: The maximum air passage per second along with the peripheral speed is calculated. On substitution the area of outlet opening is obtained.