EXAMPLE OF PIPE SERIES

Pipes in Series

Consider the two reservoirs shown in figure 16, connected by a single pipe that changes diameter over its length. The surfaces of the two reservoirs have a difference in level of 9m. The pipe has a diameter of 200mm for the first 15m (from A to C) then a diameter of 250mm for the remaining 45m (from C to B). Calculate the rate of flow and find velocity at B.

 

For the entrance use k_L = 0.5 and the exit k_L= 1.0. The join at C is sudden. For both pipes use f = 0.01.

SOLUTION:

Since this is a series pipe, using continuity equation:

using bernoulli between 1 and 2,

Threfore,