Abstract
The panel vibrations induced by fluctuating wall pressures within wall-bounded jet flow downstream of a high aspect ratio rectangular nozzle are simulated. The wall pressures are calculated using a Hybrid RANS/LES method, where LES models the large-scale turbulence in the shear layers downstream of the nozzle. The convecting turbulence in the shear layers loads the structure in a manner similar to that of turbulent boundary layer flow. However, at supersonic discharge conditions the shear layer turbulence also scatters from shock cells, generating backward-traveling surface pressure loads that drive the structure at low frequencies. The panel is rectangular with clamped edges along the sides oriented in the flow direction and free edges at the nozzle discharge and downstream edge. The panel modes of vibration are simulated with Finite Element Analysis. The structural vibration time histories are simulated by Fourier transforming the loading to the complex frequency domain, combining with the structural frequency response functions and inverse transforming the response back to the time domain. Simulated wall pressures and structural vibration agree well with measurements at on-design and underexpanded (about 50% higher pressure ratio) nozzle operating conditions. Filtering the negative wavenumber components from the loading and recomputing the structural response shows that the backward-traveling loading is responsible for about 12% of the overall structural vibration at on-design conditions and 25% of the response at underexpanded conditions.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Bonness, W.K., Capone, D.E., Hambric, S.A.: Low-wavenumber turbulent boundary layer wall-pressure measurements from vibration data on a cylinder in pipe flow. J. Sound Vib. 329, 4166–4180 (2010)
Bridges, J.E.: Noise from aft deck exhaust nozzles—differences in experimental embodiments. NASA Technical Memorandum 218123 (2014)
Hambric, S.A., Hwang, Y.F., Bonness, W.K.: Vibrations of plates with clamped and free edges excited by low-speed turbulent boundary layer flow. J. Fluids Struct. 19, 93–110 (2004)
Hambric, S.A., Jonson, M.L., Fahnline, J.B., Campbell, R.L.: Simulating the vibro-acoustic power of fluid-loaded structures excited by randomly distributed fluctuating forces. In: Proceedings of NOVEM 2005, St. Raphael, France, 18–21 Apr 2005
Hambric, S.A., Boger, D.A., Fahnline, J.B., Campbell, R.L.: Structure- and fluid-borne acoustic power sources induced by turbulent flow in 90 degree piping elbows. J. Fluids Struct. 26, 121–147 (2010)
Homma, K., Branwart, P.R., Schlinker, R.H., Rapp, B.M.: Unsteady loading and dynamic response of a structure excited by a high-speed wall-bounded jet, part ii: structural response. In: 22nd AIAA/CEAS Aeroacoustics Conference, Lyon France, May 2016
Low, K.R., Bush, R.H., Winkler, J.: Simulating sources of unsteadiness in a high-speed wall-bounded jet. In: 46th AIAA Fluid Dynamics Conference, AIAA Aviation, Washington, DC, June 2016
Lurie, M.B.: The prediction of unsteady aerodynamic loading in high aspect ratio wall bounded jets. Ph. D. Dissertation, Penn State University (2015)
Shaw, M.D.: Predicting vibratory stresses from aero-acoustic loads. Ph.D. Dissertation, Penn State University (2015)
Winkler, J., Schlinker, R.H., Simonich, J.C., Low, K.R.: Unsteady loading and dynamic response of a structure excited by a high-speed wall-bounded jet, part i: aerodynamic excitation. In: 22nd AIAA/CEAS Aeroacoustics Conference, Lyon France, May 2016
Acknowledgements
We are grateful to Rick Labelle at Pratt and Whitney for sponsoring this work. We also acknowledge the data provided by Kenji Homma and Robert Schlinker at UTRC, and the helpful comments and CFD simulations provided by Kerwin Low, Brandon Rapp, and John Liu at Pratt and Whitney.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer International Publishing AG, part of Springer Nature
About this paper
Cite this paper
Hambric, S.A., Shaw, M.D., Campbell, R.L. (2019). Panel Vibrations Induced by Supersonic Wall-Bounded Jet Flow from an Upstream High Aspect Ratio Rectangular Nozzle. In: Ciappi, E., et al. Flinovia—Flow Induced Noise and Vibration Issues and Aspects-II. FLINOVIA 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-76780-2_13
Download citation
DOI: https://doi.org/10.1007/978-3-319-76780-2_13
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-76779-6
Online ISBN: 978-3-319-76780-2
eBook Packages: EngineeringEngineering (R0)