getting following errors please guide how to solve
1. PMP-1 exceeds the maximum operating point specified for the pump curve
2. Also while running pump Failure case getting Cavitation
Regards,
D PRADHAN said:2. Also while running pump Failure case getting Cavitation
Assuming you are referring to a transient simulation in HAMMER, cavitation is an expected phenomenon when the pressure drops below the vapor pressure limit (this is set in the calculation options and defaults to -10 m)
You can read more about how HAMMER models vapor pocket formation and collapse here:
Preventing this from happening is where the engineer's job comes in. There are many possible mitigation strategies for preventing cavitation/vapor pockets but the "correct" one depends on your design and space requirements, budget and engineering judgement. For example for a pump shutdown, a hydropneumatic tank on the discharge side of the pump can often (but not always) help, but there are many other things to consider: Transient Protection Strategies
You may also need to consider how long the pump will be off, in case the topography is such that a tank would drain as long as the pump remains off. See: Negative pressures occur during a transient simulation no matter what protection is used
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.