Abstract
The aerodynamic/acoustic fields of various single and coaxial jet configurations are determined by a hybrid method to analyse the noise generation mechanisms. Three jet configurations with an artificial nozzle are considered, i.e., an isothermal single jet is compared with an unheated coaxial jet. In addition a heated coaxial jet is simulated to shed more light on the heat impact on the jet noise generation. Finally, two coaxial jet configurations with a “short cowl nozzle” are investigated to take into account more realistic jet configurations. The computational approach is based on large-eddy simulations (LES) and solutions of the acoustic perturbation equations (APE). The investigation emphasizes the core flow to have a major impact on the radiated jet noise. The analysis of the acoustic field of the coaxial jets focuses on two noise sources, the Lamb vector fluctuations and the entropy sources of the APE equations. Based on the explicit description of turbulent sources, the power spectral density (PSD) distributions evidence the Lamb vector fluctuations to represent the major acoustic sources of the isothermal jet. Furthermore, when the coaxial jet possesses a hot primary jet, the acoustic core being characterized by entropy source terms, low frequencies are amplified, i.e., the sideline acoustics is enhanced by the pronounced temperature gradient.
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References
Andersson, N., Eriksson, L., Davidson, L.: LES prediction of flow and acoustical field of a coaxial jet. AIAA Paper 2005-2884 (2005)
Bailly, C., Juvé, D.: Numerical solution of acoustic propagation problems using linearized Euler equations. AIAA Paper 98-2267 (1998)
Bogey, C., Bailly, C.: Direct computation of the sound radiated by a high Reynolds number, subsonic round jet. In: CEAS, CEAS Workshop from CFD to CAA (November 2002)
Bogey, C., Bailly, C.: Effects of inflow conditions and forcing on subsonic jet flows and noise. AIAA J. 43(5), 1000–1007 (2005)
Ewert, R., Schröder, W.: Acoustic perturbation equations based on flow decomposition via source filtering. J. Comput. Phys. 188, 365–398 (2003)
Fischer, M., Preston, G., Bryce, W.: A modeling of the noise from simple coaxial jets, Part I: with unheated primary flow. J. Sound Vib. 209(3), 385–403 (1998)
Fischer, M., Preston, G., Bryce, W.: A modeling of the noise from simple coaxial jets, Part II: with heated primary flow. J. Sound Vib. 209(3), 405–417 (1998)
Freund, J.: A proposed inflow/outflow boundary condition for direct computation of aerodynamic sound. AIAA J. 35(4), 740–742 (1997)
Freund, J.: Noise sources in a low-Reynolds-number turbulent jet at Mach 0.9. J. Fluid Mech. 438, 277–305 (2001)
Fureby, C., Grinstein, F.: Monotonically integrated large eddy simulation of free shear flows. AIAA J. 37(5), 544–556 (1999)
Gröschel, E., Meinke, M., Schröder, W.: Noise prediction for a turbulent jet using an LES/CAA method. AIAA Paper 2005-3039 (2005)
Gröschel, E., Meinke, M., Schröder, W.: Noise generation mechanisms in single and coaxial jets. AIAA Paper 2006-2592 (2006)
Gröschel, E., Schröder, W., Renze, P., Meinke, M., Comte, P.: Noise prediction for a turbulent jet using different hybrid methods. Comput. & Fluids 37, 414–426 (2008)
Hardin, J., Hussaini, M.: Computational aeroacoustics. Springer, Heidelberg (1993)
Hoch, R., Duponchel, J., Cocking, B., Bryce, W.: Studies of the influence of density jet noise. J. Sound Vib. 28, 649–668 (1973)
Hu, F., Hussaini, M., Manthey, J.: Low-dissipation and low-dispersion Runge-Kutta schemes for computational acoustics. J. Comput. Phys. 124, 177–191 (1996)
Koh, S., Gröschel, E., Meinke, M., Schröder, W.: Numerical analysis of sound sources in high Reynolds number single jets. AIAA Paper 2007-3591 (2007)
Lighthill, J.: On sound generated aeroacoustically: II. turbulence as a source of sound. Proc. R. Soc. Lond. Series A 222, 1–32 (1954)
Lilley, G.: The radiated noise from isotropic turbulence with application to the theory of jet noise. J. Sound Vib. 190(3), 463–476 (1996)
Meinke, M., Schröder, W., Krause, E., Rister, T.: A comparison of second- and sixth-order methods for large-eddy simulations. Comput. & Fluids 31, 695–718 (2002)
Morfey, C.: Amplification of aerodynamic noise by convected flow inhomogeneities. J. Sound Vib. 31(4), 391–397 (1973)
Renze, P., Schröder, W., Meinke, M.: Large-eddy simulation of film cooling flows at density gradients. Int. J. Heat& Fluid Flow 29(1), 18–34 (2008)
Rütten, F., Schröder, W., Meinke, M.: Large-eddy simulation of low frequency oscillations of the Dean vortices in turbulent pipe bend flows. Phys. of Fluids 17(3), 35107 (2005)
Schröder, W., Ewert, R.: LES-CAA coupling. In: Large-eddy simulations for acoustics. Cambridge University Press, Cambridge (2005)
Schröder, W., Ewert, R., Bui, T., Gröschel, E.: An LES-APE approach in computational aeroacoustics theory and applications. In: VKI Lecture Note VKI-LS 2006-05 (2006)
Seiner, J.M., Ponton, M.K., Jansen, B.J., Lagen, N.T.: The effects of temperature on supersonic jet noise emission. AIAA Paper 92-02-046 (1992)
Simonich, J., Barber, S.N.T.: High subsonic jet experiment Part I: aeroacoustical characterization, noise reduction and dimentional scaling effects. AIAA J. 39(11), 2062–2069 (2001)
Tam, C., Golebiowski, M., Seiner, J.: On the two components of turbulent mixing noise from supersonic jets. AIAA Paper 96-1716 (1996)
Tam, C., Webb, J.: Dispersion-relation-preserving finite difference schemes for computational acoustics. J. Comput. Phys. 107, 262–281 (1993)
Tanna, H.: An experimental study of jet noise. Part I: turbulent mixing noise; Part II: shock associate noise. J. Sound Vib. 50, 405–444 (1977)
Tanna, H., Dean, P., Fisher, M.: The influence of temperature on shock-free supersonic jet noise. J. Sound Vib. 39, 429–460 (1975)
Tinney, C., Jordan, P., Guitton, A., Delville, J., Coiffet, F.: A study in the near pressure field of coaxial subsonic jets. AIAA Paper 2006-2589 (2006)
Viswanathan, K.: Jet aeroacoustic testing: issues and implications. AIAA J. 41(9), 1674–1689 (2003)
Viswanathan, K.: Aeroacoustics of hot jets. J. Fluid Mech. 516, 39–82 (2004)
Yan, J., Tawackolian, K., Michel, U., Thiele, F.: Computation of jet noise using a hybrid approach. AIAA Paper 2005-3621 (2007)
Zaman, K.: Flow field and near and far sound field of a subsonic jet. J. Sound Vib. 106(1), 1–16 (1986)
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Koh, S.R., Schröder, W., Gröschel, E., Meinke, M., Comte, P. (2009). Noise Prediction for Turbulent Coaxial Jets. In: Brun, C., Juvé, D., Manhart, M., Munz, CD. (eds) Numerical Simulation of Turbulent Flows and Noise Generation. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 104. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89956-3_5
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DOI: https://doi.org/10.1007/978-3-540-89956-3_5
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