Consider two hydraulic turbines having identical specific

Consider two hydraulic turbines having identical specific speed and effective head at the inlet. If the speed ratio (N₁ /N₂) of the two turbines is 2, then the respective power ratio (P₁ /P₂) is ____.

N_s	N√P
	H^5/4

Given N_s1 = N_s2, H₁ H₂

	N₁	= 2,	P₁	= ?
	N₂		P₂

N₁ √P₁ = N₂√P₂

⇒	P₁	=		N₁			²
	P₂			N₂

=		1		²	= 0.25
		2