Final answer:
To find the rotative speed of the turbine with a bigger capacity, we can use the equation for specific speed.
Step-by-step explanation:
To find the rotative speed of the turbine with a bigger capacity, we need to use the equation for specific speed:
Specific Speed (Ns) = (N √Q) / H^0.75
Where N is the rotational speed, Q is the flow rate, and H is the head or power.
Since we know the specific speed is 70 rpm and the flow rate is 18100 kg/sec, we can rearrange the equation to find N:
N = (Ns * √Q) / H^0.75
Assuming the efficiency is the same for both turbines, we can use this equation to find the rotative speed of the turbine with a bigger capacity.