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5. Computational noise prediction
Noise prediction remains a difficult problem, requiring considerable computing resources. It can only be done on an approximate basis. We will deal here only with the 2 main lines encountered on a pump:
the line at rotation speed N, of mechanical origin ;
the line at frequency n r N (scrolling of the impeller blades).
5.1 Line at frequency N
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Computational noise prediction
Noise generated by cavitation
Bibliography
Circuit calculation codes
Pressure fluctuations emitted by a pump (or valve) must be analyzed to determine the risk they represent for the circuit (stresses, vibration levels, natural frequencies, forces exerted on the structure).
As we have already seen
Standardization
All aspects of testing standards are covered in depth in the reference . We have extracted the most important passages:
Airborne noise measurement
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