Time Domain Wave Packet method and suppression of instability waves in aeroacoustic computation

2011 ◽  
Author(s):  
Fang Hu ◽  
Xiaodong Li ◽  
Xiaoyan Li ◽  
Min Jiang
Keyword(s):  
Wave Packet ◽  
Time Domain ◽  
Instability Waves

Time Domain Wave Packet Method and Suppression of Instability Waves in Aeroacoustic Computations

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Fang Q. Hu ◽  
X. D. Li ◽  
X. Y. Li ◽  
M. Jiang
Keyword(s):  
Wave Packet ◽  
Time Domain ◽  
Acoustic Waves ◽  
Fan Noise ◽  
Full Spectrum ◽  
Instability Waves ◽  
Numerical Resolution ◽  
Broadband Pulse ◽  
Filtering Technique ◽  
The Time Domain

A new time domain methodology for Computational Aeroacoustics (CAA) is proposed. The time domain wave packet (TDWP) method employs a temporally compact broadband pulse for acoustic sources. As the radiation and transmission of acoustic waves of all frequencies within the numerical resolution are embedded in the propagation of the wave packet, acoustic solution of the full spectrum become available at once. In addition, it becomes possible to separate the acoustic and instability waves in shear flows in the time domain wave packet method due to the compactness of the wave packet. The instability waves can further be suppressed by a source filtering technique, applied after the acoustic wave packet has propagated through the shear layers. Details on the source filtering technique used in the paper are presented. The TDWP method has been validated using a CAA Benchmark problem. The TDWP method is also applied to the NASA/GE Fan Noise Source Diagnostic Test (SDT) exhaust radiation problem.

Analysis of Wave Packet Motion in Frequency and Time Domain:  Oxazine 1

2006 ◽  
Vol 110 (32) ◽  
pp. 9793-9800 ◽  
Author(s):  
Markus Braun ◽  
Constanze Sobotta ◽  
Regina Dürr ◽  
Horst Pulvermacher ◽  
Stephan Malkmus
Keyword(s):  
Wave Packet ◽  
Time Domain ◽  
Oxazine 1

scholarly journals Generation of the simplest rotational wave packet in a diatomic molecule: Tracing a two-level superposition in the time domain

2012 ◽  
Vol 85 (5) ◽  
Author(s):  
A. Przystawik ◽  
A. Kickermann ◽  
A. Al-Shemmary ◽  
S. Düsterer ◽  
A. M. Ellis ◽  
...  
Keyword(s):  
Wave Packet ◽  
Diatomic Molecule ◽  
Time Domain ◽  
Rotational Wave ◽  
The Time Domain

Ultrafast time-domain wave packet evolution of atomic photoionization

2019 ◽  
Vol 36 (2) ◽  
pp. 493
Author(s):  
Rui-Hua Xu ◽  
Zhaoyan Zhou ◽  
Xu Wang
Keyword(s):  
Wave Packet ◽  
Time Domain
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