Experimental investigation of acoustic oscillations in a heat exchanger in an air-conditioning indoor unit

• Autores: Kangjie Sun, Hua Ouyang, Jie Tian, Zahaohui Du
• Localización: Noise Control Engineering Journal, ISSN 0736-2501, Vol. 63, Nº. 1, 2015, págs. 86-93
• Idioma: inglés
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• Resumen

  • The behavior of noise generated by flow through the heat exchanger of indoor unit at low-speed free stream is studied by aero-acoustic performance measurements. First, the aero-acoustic performance experiment has been carried out for different velocities and angles. The characteristics of noise are investigated. It was found that the noise can be generated at particular conditions which are considered as the most important factors that influence the aerodynamic performance of the heat exchanger. Moreover, analysis was carried out to identify the oscillation modes in cavities. Second, a modified semiempirical formula for the model is presented matching the experimental results so that the model of noise can be applied at the low-speed free stream.