0
Research Papers

Characteristics of Turbulence in a Turbofan Stage

[+] Author and Article Information
Jeremy Maunus

Graduate Research Assistant

Sheryl Grace

Associate Professor
Mem. ASME
e-mail: sgrace@bu.edu

Douglas Sondak

Scientific Programmer
Mem. ASME
e-mail: sondak@bu.edu

Victor Yakhot

Professor
e-mail: vy@bu.edu
Department of Mechanical Engineering,
Boston University,
Boston, MA 02215

1Present address: Project Engineering, General Compression, 274 Washington St. Suite 210, Newton, MA 02458.

2Corresponding author.

Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received December 27, 2010; final manuscript received January 25, 2012; published online November 8, 2012. Editor: David Wisler.

J. Turbomach 135(2), 021024 (Nov 08, 2012) (10 pages) Paper No: TURBO-10-1232; doi: 10.1115/1.4006774 History: Received December 27, 2010; Revised January 25, 2012

Two-equation turbulence models are commonly used in the simulation of turbomachinery flow fields, but there are limited experimental data available to validate the resulting turbulence quantities. Experimental measurements are available from NASA’s Source Diagnostic Test (SDT), a 1/5th scale model representation of the bypass stage of a turbofan engine. Detailed unsteady hot-wire anemometer data were taken at two axial locations between the rotor and fan exit guide vanes (FEGVs). Here, an accurate and consistent procedure is used to obtain the turbulent kinetic energy, dissipation rate, and integral length scale from structure functions calculated using the SDT data. These results are compared to the solutions provided by four proprietary CFD codes that employ two-equation turbulence models. The simulations are shown to predict the turbulent kinetic energy and length scale reasonably well as well as the trend in mean dissipation. The actual mean dissipation rates differ by nearly two orders of magnitude due to a difference in interpretation between the classical definition and what is used in CFD.

FIGURES IN THIS ARTICLE
<>
Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.

References

Lumley, J. L., 1967, “Similarity and the Turbulent Energy Spectrum,” Phys. Fluids, 10, pp. 855–858. [CrossRef]
Saddoughi, S. G., and Veeravalli, S. V., 1994, “Local Isotropy in Turbulent Boundary Layers at High Reynolds Number,” J. Fluid Mech., 268, pp. 333–372. [CrossRef]
Landau, L. D., and Lifshitz, E. M., 1959, “Fluid Mechanics,” Pergamon Press.
Bailey, S. C., Hultmark, M., Schumacher, J., Yakhot, V., and Smits, A. J., 2009, “Measurement of Local Dissipation Scales in Turbulent Pipe Flow,” Phys. Rev. Lett., 103, p. 014502. [CrossRef] [PubMed]
Donzis, D. A., Sreenivasan, K. R., and Yeung, P. K., 2005, “Scalar Dissipation Rate and Dissipative Anomaly in Isotropic Turbulence,” J. Fluid Mech., 532, pp. 199–216. [CrossRef]
Schumacher, J., Sreenivasan, K. R., and Yakhot, V., 2007, “Asymptotic Exponents From Low-Reynolds-Number Flows,” New J. Phys., 9(89), pp. 1–19. [CrossRef]
Zhou, Q., and Xia, K.-Q., 2010, “Universality of Local Dissipation Scales in Buoyancy-Driven Turbulence,” Phys. Rev. Lett., 104, p. 124301. [CrossRef] [PubMed]
Camp, T., and Shin, H.-W., 1995, “Turbulence Intensity and Length Scale Measurements in Multistage Compressors,” J. Turbomach., 117, pp. 38–46. [CrossRef]
Doering, C. R., and Foias, C., 2002, “Energy Dissipation in Body-Forced Turbulence,” J. Fluid Mech., 467, pp. 289–306. [CrossRef]
Seoud, R. E., and Vassilicos, J. C., 2007, “Dissipation and Decay of Fractal-Generated Turbulence,” Phys. Fluids, 19, p. 105108. [CrossRef]
Nallasamy, M., and Envia, E., 2005, “Computation of Rotor Wake Turbulence Noise,” J. Sound Vib., 282, pp. 649–678. [CrossRef]
Envia, E., 2002, “Souce Diagnostic Test-Vane Unsteady Pressure Results,” NASA, Technical Report No. TM-2002-211808.
Hughes, C. E., Jeracki, R. J., Woodward, R. P., and Miller, C. J., 2005, “Fan Noise Source Diagnostic Test-Rotor Alone Aerodynamic Performance Results,” NASA, Technical Report No. TM-2005-211681.
Podboy, G. G., Krupar, M. J., Helland, S. M., and Hughes, C. E., 2003, “Steady and Unsteady Flow Field Measurements Within a NASA 22-Inch Fan Model,” NASA, Technical Report No. TM-2003-212329.
Kolmogorov, A. N., 1991, “Dissipation of Energy in the Locally Isotropic Turbulence,” Proc. R. Soc. Edinburgh, Math. Physic. Sci., 434(1890), pp. 15–17.
Monin, A. S., and Yaglom, A. M., 1971, Statistical Fluid Mechanics: Mechanics of Turbulence, Vol. 2, MIT Press, Cambridge, MA.
Hinze, J. O., 1987, Turbulence, McGraw-Hill, New York.
Oberlack, M., 1997, “Non-Isotropic Dissipation in Non-Homogeneous Turbulence,” J. Fluid Mech., 350, pp. 351–374. [CrossRef]
Axelsson, L.-U., and George, W. K., 2008, “Spectral Analysis of the Flow in an Intermediate Turbine Duct,” Proceedings of the ASME Turbo Expo 2008: Power for Land, Sea, and Air, 6, pp. 1419–1426.
Frisch, U., 1995, Turbulence: The Legacy of A.N. Kolmogorov, Cambridge University Press, Cambridge, UK.
Schlichting, H., 1987, Boundary-Layer Theory, McGraw-Hill, New York.

Figures

Grahic Jump Location
Fig. 1

Source diagnostic test

Grahic Jump Location
Fig. 2

Average passage streamwise mean velocities (ft/s)

Grahic Jump Location
Fig. 3

Midspan passagewise root mean square velocities (ft/s)

Grahic Jump Location
Fig. 4

Radial distribution of mean square velocities (ft2/s2)

Grahic Jump Location
Fig. 5

Midspan second-order structure functions (ft2/s2)

Grahic Jump Location
Fig. 6

Midspan passagewise mean dissipation rate (ft2/s3)

Grahic Jump Location
Fig. 7

Radial distribution of mean dissipation rate (ft2/s3)

Grahic Jump Location
Fig. 8

Radial distribution of circumferentially averaged integral length scale (in.)

Grahic Jump Location
Fig. 9

Calculation of Cɛ and passagewise distribution of Λ1

Grahic Jump Location
Fig. 10

Passagewise distribution of normalized streamwise velocity

Grahic Jump Location
Fig. 11

Radial distributions of turbulent kinetic energy, dissipation rate, and length scale

Grahic Jump Location
Fig. 12

Passagewise distributions of turbulent kinetic energy, dissipation rate, and length scale

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In