For geometrically similar fans, if flow scales linearly with speed, the static pressure (head) in in w.g. (for same gas density) typically scales with speed to which power?
Choices
- (A) N⁰
- (B) N^1
- (C) N²
- (D) N^3
Correct answer: (C)
N²
Explanation
Fan similarity: p ∝ N², Q ∝ N, power ∝ N³ at constant ρ.