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Flow Induced Noise Emanating from Evaporator Tube Plates

From Delphi
 

 

This work examines, objectively and subjectively, refrigerant noise induced by the flow of R134a through seven different plate-type automotive evaporator tubes with two tube heights and airflow depths ranging from about 45 mm to 75 mm. Experiments were conducted with both superheated and two-phase refrigerant without and with heating, and without/with lubricant. Measurements of tube surface acceleration were used to quantify flow induced acoustic phenomena.

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