Three-dimensional aeroacoustic numerical simulation of flow induced noise of mufflers

	Three-dimensional aeroacoustic numerical simulation of flow induced noise of mufflers
	Yang Y(杨焱); Sun HL; Yang, Y. (yangy@ustc.edu)
会议录名称	Communications in Computer and Information Science
	2014
会议名称	26th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013
会议日期	May 20, 2013 - May 24, 2013
会议地点	Changsha, China
摘要	Mufflers are widely applied in industrial flow duct systems or internal combustion engines, to reduce the amount of noise carried by the upstream flow. Although the flow in the duct of the muffler is commonly unsteady, complex and turbulent, which generates noise by itself. The flow noise should be considered for design and optimization of the muffler. By means of a three-dimensional numerical simulation integrated CFD (computational fluid dynamics) and CAA (computational aeroacoustics), the paper investigated two typical mufflers. The first one has an expanded chamber in the duct, and the second one has the same chamber but whilst has a perforated wall between the duct and the chamber. The nonlinear acoustic solver is implemented to model noise generation and transmission from an initial statistically-steady turbulent flow, which provided by RANS (Reynolds-averaged Navier-Stokes) simulation, and to simulate the noise in near field. The radiated far-field noise of the mufflers was predicted by FW-H (Ffowcs Williams-Hawking) acoustic analogy. The mechanisms of the vortex and sound generation were revealed, and results indicate that the perforated tube muffler has much lower flow induced noise level. The solver of the numerical simulation has been parallelized with MPI, and run on a HPC cluster, due to the large computation cost. © Springer-Verlag Berlin Heidelberg 2014.
关键词	Cfd (Computational Fluid Dynamics) Computation Costs Computational Aeroacoustics (Caa) Design And Optimization Flow Induced Noise Non-linear Acoustics Reynolds-averaged Navier-stokes Three-dimensional Numerical Simulations
课题组名称	LHD气动布局优化与计算方法
ISBN号	9783642539619
URL	查看原文
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60223
专题	高温气体动力学国家重点实验室
通讯作者	Yang, Y. (yangy@ustc.edu)
推荐引用方式 GB/T 7714	Yang Y,Sun HL,Yang, Y. . Three-dimensional aeroacoustic numerical simulation of flow induced noise of mufflers[C]Communications in Computer and Information Science,2014.

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