Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle

Stephen A. Hambric; Matthew D. Shaw; Robert L. Campbell

doi:10.1007/978-3-319-76780-2_13

Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle

Stephen A. Hambric, Matthew D. Shaw, Robert L. Campbell

Applied Research Laboratory (ARL)

Research output: Chapter in Book/Report/Conference proceeding › Chapter

1 Scopus citations

Abstract

The panel vibrations induced by fluctuating wall pressures within wallbounded 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 amanner 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.

Original language	English (US)
Title of host publication	Flinovia-Flow Induced Noise and Vibration Issues and Aspects-II
Subtitle of host publication	A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response
Publisher	Springer International Publishing
Pages	197-216
Number of pages	20
ISBN (Electronic)	9783319767802
ISBN (Print)	9783319767796
DOIs	https://doi.org/10.1007/978-3-319-76780-2_13
State	Published - May 25 2018

All Science Journal Classification (ASJC) codes

General Engineering
General Physics and Astronomy

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10.1007/978-3-319-76780-2_13

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Hambric, S. A., Shaw, M. D., & Campbell, R. L. (2018). Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle. In Flinovia-Flow Induced Noise and Vibration Issues and Aspects-II: A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response (pp. 197-216). Springer International Publishing. https://doi.org/10.1007/978-3-319-76780-2_13

Hambric, Stephen A. ; Shaw, Matthew D. ; Campbell, Robert L. / Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle. Flinovia-Flow Induced Noise and Vibration Issues and Aspects-II: A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response. Springer International Publishing, 2018. pp. 197-216

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abstract = "The panel vibrations induced by fluctuating wall pressures within wallbounded 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 amanner 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.",

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Hambric, SA, Shaw, MD & Campbell, RL 2018, Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle. in Flinovia-Flow Induced Noise and Vibration Issues and Aspects-II: A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response. Springer International Publishing, pp. 197-216. https://doi.org/10.1007/978-3-319-76780-2_13

Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle. / Hambric, Stephen A.; Shaw, Matthew D.; Campbell, Robert L.
Flinovia-Flow Induced Noise and Vibration Issues and Aspects-II: A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response. Springer International Publishing, 2018. p. 197-216.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

TY - CHAP

T1 - Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle

AU - Hambric, Stephen A.

AU - Shaw, Matthew D.

AU - Campbell, Robert L.

PY - 2018/5/25

Y1 - 2018/5/25

N2 - The panel vibrations induced by fluctuating wall pressures within wallbounded 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 amanner 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.

AB - The panel vibrations induced by fluctuating wall pressures within wallbounded 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 amanner 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.

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Hambric SA, Shaw MD, Campbell RL. Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle. In Flinovia-Flow Induced Noise and Vibration Issues and Aspects-II: A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response. Springer International Publishing. 2018. p. 197-216 doi: 10.1007/978-3-319-76780-2_13

Panel vibrations induced by supersonic wall-bounded jet flow from an upstream high aspect ratio rectangular nozzle

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