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Time-domain characterization of the acoustic damping of a perforated liner with bias flow

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Time-domain characterization of the acoustic damping of a perforated liner with bias flow
นักวิจัย : Zhong, Zhiyuan , Zhao, Dan
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Zhong, Z.,& Zhao, D. (2012). Time-domain characterization of the acoustic damping of a perforated liner with bias flow. The Journal of the Acoustical Society of America, 132(1), 271. , 0001-4966 , http://hdl.handle.net/10220/18696 , http://dx.doi.org/10.1121/1.4728197
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : The journal of the acoustical society of America
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Combustioninstabilities are caused by the interaction of unsteady heat releases and acoustic waves. To mitigate combustioninstabilities, perforated liners, typically subjected to a low Mach number bias flow (a cooling flow through perforated holes), are fitted along the bounding walls of a combustor. They dissipate the acoustic waves by generating vorticity at the rims of perforated apertures. To investigate the absorption of plane waves by a perforated liner with bias flow, a time-domain numerical model of a cylindrical lined duct is developed. The liners’ damping mechanism is characterized by using a time-domain “compliance.” The development of such time-domain compliance is based on simplified or unsimplified Rayleigh conductivity. Numerical simulations of two different configurations of lined duct systems are performed by combining a 1D acoustic wavemodel with the compliance model. Comparison is then made between the results from the present models, and those from the experiment and the frequency-domain model of previous investigation [Eldredge and Dowling, J. Fluid Mech. 485, 307–335(2003)]. Good agreement is observed. This confirms that the present model can be used to simulate the propagation and dissipation of acoustic plane waves in a lined duct in real-time.

บรรณานุกรม :
Zhong, Zhiyuan , Zhao, Dan . (2555). Time-domain characterization of the acoustic damping of a perforated liner with bias flow.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhong, Zhiyuan , Zhao, Dan . 2555. "Time-domain characterization of the acoustic damping of a perforated liner with bias flow".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhong, Zhiyuan , Zhao, Dan . "Time-domain characterization of the acoustic damping of a perforated liner with bias flow."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Zhong, Zhiyuan , Zhao, Dan . Time-domain characterization of the acoustic damping of a perforated liner with bias flow. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.