# Calculate and compare the turbine specific speed for both the small (A) and large (B) Turbines of

## Question:

Calculate and compare the turbine specific speed for both the small (A) and large (B) Turbines of Prob. 14–123. What kind of turbine are these most likely to be?

**Data from Prob. 14–123.**

A group of engineers is designing a new hydroturbine by scaling up an existing one. The existing turbine (turbine A) has diameter D_{A} = 1.50 m, and spins at ṅ_{A} = 150 rpm. At its best efficiency point, V̇_{A} = 162 m^{3}/s, H_{A} = 90.0 m of water, and bhp_{A} = 132 MW. The new turbine (turbine B) will spin at 105 rpm, and its net head will be H_{B} = 95 m. Calculate the diameter of the new turbine such that it operates most efficiently, and calculate V̇_{B} and bhp_{B}.

## Step by Step Answer:

**Related Book For**

## Fluid Mechanics Fundamentals And Applications

**ISBN:** 9780073380322

3rd Edition

**Authors:** Yunus Cengel, John Cimbala