Ting Tsung CHANG, Konstantinos KONTIS

DOI Number: 10.60853/kjxq-bb34

Conference number: HiSST-2024-00197

Modulation characteristics of the cavity still inspire people to study through a variety of mathematic
approaches. The primary purpose here is to apply not only conventional fast Fourier transform but
continuous wavelet transforms to study the spectrum of different cavity flow configurations
experimentally. Via modulation analysis, we find that the suggested modulation parameter, normally
0.25, in the theoretical model is not always constant. Since the shear layer impingement on the trailing-
edge is the dominant source driving the aeroacoustic mechanism, the angled ramp significantly alters
its development, and the level of the pressure tone drops dramatically. An innovative passive control
method with sub-cavity introduced recently is studied in this paper as well. The sub-cavity applied on
the aft wall, however, considerably amplifies pressure tones inside the sub-cavity and induces extra
modes by fluidic resonance. Moreover, the frequency spectrum of AM of individual Rossiter mode
indicates the interaction between each mode.

Read the full paper here

In Categories: 1.Events, High-Speed Aerodynamics and Aerothermodynamics, HiSST 2024
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.