نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه یزد
2 هیلت علمی-دانشگاه یزد
3 دانشیار دانشگاه مالک اشتر
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In the present study, far-field aeroacoustic noise emitted from flow over CAARC tall building model at different angles of attack is investigated. The unsteady surface pressure measurements are conducted in a wind tunnel. The purpose of this study is to estimate the far-field noise emitted by measuring the unsteady surface pressures. The surface pressure data are used as input of a numerical algorithm to solve Fw-H equation. The aerodynamic and aeroacoustic characteristics of flow over a 2D square cylinder and the CAARC model are presented. The results revealed that the peak of vortex shedding frequency could be observed in the spectrum of surface pressure signals of sensors located on the side surfaces of the model. Its frequency is in an excellent agreement with the hot wire measurement results. The Strouhal number for flow around CAARC model changes in the range of 0.08-0.1 depending on the angle of attack. Also dipole pattern for sound radiation was also observed for 3D model which is related to the vortex shedding phenomenon. The effect of angle of attack on the SPL is also dependent to the reciever’s location.
کلیدواژهها [English]
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