Fan e.g. centrifugal fan, for use in radiator of car, has obstacle for producing noise whose phase is opposite to that of selected tonal noise, where amplitude of obstacle noise is equal to that of tonal noise

The fan (210) has a rotor (112) comprising blades (114) which produce tonal noises. A casing contains the rotor and defines an outlet (120) of the fan, where the outlet is tangential to the rotor. A trapezoidal obstacle (134) is arranged in an air flow provoked during rotation of the rotor, such tha...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	BERRY ALAIN, BESOMBES MICHEL, MASSON PATRICE, GERARD ANTHONY
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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