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Computation of Transonic Nozzle Sound Transmission and Rotor Problems by the Dispersion-Relation-Preserving SchemeThe transonic nozzle transmission problem and the open rotor noise radiation problem are solved computationally. Both are multiple length scales problems. For efficient and accurate numerical simulation, the multiple-size-mesh multiple-time-step Dispersion-Relation-Preserving scheme is used to calculate the time periodic solution. To ensure an accurate solution, high quality numerical boundary conditions are also needed. For the nozzle problem, a set of nonhomogeneous, outflow boundary conditions are required. The nonhomogeneous boundary conditions not only generate the incoming sound waves but also, at the same time, allow the reflected acoustic waves and entropy waves, if present, to exit the computation domain without reflection. For the open rotor problem, there is an apparent singularity at the axis of rotation. An analytic extension approach is developed to provide a high quality axis boundary treatment.
Document ID
20010061399
Document Type
Conference Paper
Authors
Tam, Christopher K. W.
(Florida State Univ. Tallahassee, FL United States)
Aganin, Alexei
(Florida State Univ. Tallahassee, FL United States)
Date Acquired
August 20, 2013
Publication Date
August 1, 2000
Publication Information
Publication: Third Computational Aeroacoustics (CAA) Workshop on Benchmark Problems
Subject Category
Acoustics
Funding Number(s)
CONTRACT_GRANT: NAG3-2102
CONTRACT_GRANT: NAG1-1986
CONTRACT_GRANT: NAG1-2145
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20010061385Analytic PrimaryThird Computational Aeroacoustics (CAA) Workshop on Benchmark Problems
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