Coherent structure identification in a lobed mixer

L. Ukeiley, D. Wick, Mark N Glauser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The influence of large scale structures on the flow in a lobed mixer (a device utilized to enhance streamwise vorticity for increased mixing) is examined by a pseudo flow visualization method (v. Delville et al. 1988), and the Proper Orthogonal Decomposition (POD) (v. Lumley 1967). The pseudo flow visualization method utilizes specially designed hot wire rakes with high spatial resolution to provide the capability of plotting instantaneous velocity profiles. In this work, a rake of 15 hot wires is used to provide these profiles for a velocity ratio of 2:1, at several positions downstream of the lobed mixer. From these profiles a detailed description of the flow field is achieved. In particular, from this information, an idea of the spatial extent and shedding frequency of the large scale structures is determined. The shedding frequencies found are consistent with those found from spectral measurements. A one-dimensional version of the POD is then applied, which utilizes the measured streamwise velocity two-point correlation tensor. The pseudo flow visualization technique is then used to view the contribution from each proper orthogonal mode to the instantaneous signal and comparisons made to the full signal.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Turbo Expo
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume3
ISBN (Print)9780791879009
DOIs
StatePublished - 1991
Externally publishedYes
EventASME 1991 International Gas Turbine and Aeroengine Congress and Exposition, GT 1991 - Orlando, United States
Duration: Jun 3 1991Jun 6 1991

Other

OtherASME 1991 International Gas Turbine and Aeroengine Congress and Exposition, GT 1991
CountryUnited States
CityOrlando
Period6/3/916/6/91

Fingerprint

Flow visualization
Wire
Decomposition
Vorticity
Tensors
Flow fields

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ukeiley, L., Wick, D., & Glauser, M. N. (1991). Coherent structure identification in a lobed mixer. In Proceedings of the ASME Turbo Expo (Vol. 3). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/91GT307

Coherent structure identification in a lobed mixer. / Ukeiley, L.; Wick, D.; Glauser, Mark N.

Proceedings of the ASME Turbo Expo. Vol. 3 American Society of Mechanical Engineers (ASME), 1991.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ukeiley, L, Wick, D & Glauser, MN 1991, Coherent structure identification in a lobed mixer. in Proceedings of the ASME Turbo Expo. vol. 3, American Society of Mechanical Engineers (ASME), ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition, GT 1991, Orlando, United States, 6/3/91. https://doi.org/10.1115/91GT307
Ukeiley L, Wick D, Glauser MN. Coherent structure identification in a lobed mixer. In Proceedings of the ASME Turbo Expo. Vol. 3. American Society of Mechanical Engineers (ASME). 1991 https://doi.org/10.1115/91GT307
Ukeiley, L. ; Wick, D. ; Glauser, Mark N. / Coherent structure identification in a lobed mixer. Proceedings of the ASME Turbo Expo. Vol. 3 American Society of Mechanical Engineers (ASME), 1991.
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