Exercise 2. VI Operation of a hydro-ejector

This exercise aims to understand the principle of operation of a hydro-ejector, which is an apparatus used, for example, for cleaning the walls of a basin. 

State the operating conditions of the pump in terms of flow rate and head. 

For simplicity, it is assumed that the velocity Uj is the same as the one determined in Question 1. If Question 1 has not been solved, a value of 17, = 4 m s may be used. The pressure value, however, is not necessarily the same. The axis of the hydro-ejector is located at a depth h under the free-surface level of the basin. 

What indications can be provided regarding the pressure field in planes P and P l (Numerical values will be calculated at the end of Question 5.) 

Explain the mechanism that draws fluid through the secondary supply. State a first relation involving U.  

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