Compressibility and mixing in turbulent free shear layers

J Craig Dutton, R. F. Burr, S. G. Goebel, N. L. Messersmith

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

Abstract

Experimental and numerical results from an investigation of compressible, turbulent shear layers are presented. In particular, the issues of compressibility and mixing in these flows are addressed. Two-component laser Doppler velocimeter (LDV) measurements reveal that the transverse turbulence intensity and normalized Reynolds shear stress decrease with increasing relative Mach number (compressibility), while the Reynolds stress correlation coefficient remains constant and the anisotropy increases. Two-dimensional digital images of Mie scattering signals demonstrate that large-scale, organized structures occur less frequently and are less well defined at high relative Mach numbers. Statistical processing of these images suggests that a preferred mixed fluid concentration does not occur in the shear layer under the current conditions. A new one-equation algebraic stress turbulence model with improved pressure-strain modeling is presented that accounts for variations in the anisotropy of the normal stresses. Results from the proposed model agree well with the detailed LDV data. In addition, transport modeling of a passive scalar is considered, with special emphasis given to modeling the unmixedness.

Original languageEnglish (US)
Title of host publicationPreprints for the Symposium on Turbulence
EditorsX.B.Jr. Reed, G.K. Patterson, J.L. Zakin
PublisherPubl by Univ of Missouri
StatePublished - 1990
EventTwelfth Turbulence Symposium - Rolla, MS, USA
Duration: Sep 24 1990Sep 26 1990

Other

OtherTwelfth Turbulence Symposium
CityRolla, MS, USA
Period9/24/909/26/90

Fingerprint

Compressibility
Laser Doppler velocimeters
Mach number
Anisotropy
Turbulence models
Shear stress
Turbulence
Scattering
Fluids
Processing

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Dutton, J. C., Burr, R. F., Goebel, S. G., & Messersmith, N. L. (1990). Compressibility and mixing in turbulent free shear layers. In X. B. J. Reed, G. K. Patterson, & J. L. Zakin (Eds.), Preprints for the Symposium on Turbulence Publ by Univ of Missouri.

Compressibility and mixing in turbulent free shear layers. / Dutton, J Craig; Burr, R. F.; Goebel, S. G.; Messersmith, N. L.

Preprints for the Symposium on Turbulence. ed. / X.B.Jr. Reed; G.K. Patterson; J.L. Zakin. Publ by Univ of Missouri, 1990.

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

Dutton, JC, Burr, RF, Goebel, SG & Messersmith, NL 1990, Compressibility and mixing in turbulent free shear layers. in XBJ Reed, GK Patterson & JL Zakin (eds), Preprints for the Symposium on Turbulence. Publ by Univ of Missouri, Twelfth Turbulence Symposium, Rolla, MS, USA, 9/24/90.
Dutton JC, Burr RF, Goebel SG, Messersmith NL. Compressibility and mixing in turbulent free shear layers. In Reed XBJ, Patterson GK, Zakin JL, editors, Preprints for the Symposium on Turbulence. Publ by Univ of Missouri. 1990
Dutton, J Craig ; Burr, R. F. ; Goebel, S. G. ; Messersmith, N. L. / Compressibility and mixing in turbulent free shear layers. Preprints for the Symposium on Turbulence. editor / X.B.Jr. Reed ; G.K. Patterson ; J.L. Zakin. Publ by Univ of Missouri, 1990.
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