CE 704 · Chapter 6
Hydropower Engineering past question
6.3 Penstocks and Pressure shaft: importance, conditions of their application, general arrangement, hydraulic transients (water hammer), Computation of hydrodynamic pressure, sizing of penstock/pressure shaft and estimation of thickness of steel in penstock/pressure shaft
In a hydropower project the headrace tunnel of 4.0 m diameter and 4000 m length carries 20 m³/s discharges to the surge tank of 10 m diameter. The penstock from surge tank to power house has 3.2 m diameter and 700 m length. Considering the case of instantaneous closure, find the maximum height of surge tank required and time period of oscillation of wave. Assume friction factor = 0.018. [8]