Effect of opening obstructions on the flow-excited response of a Helmholtz resonator

Zoccola, Paul J.

doi:10.1016/j.jfluidstructs.2004.04.013

Cited by 15 publications

(10 citation statements)

References 20 publications

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“…The geometry studied here corresponds to that examined experimentally by Zoccola 13. A cutout of the geometry illustrating the salient features is shown in Figure 3.…”

Section: Baseline Helmholtz Resonator Studiesmentioning

confidence: 99%

“…Several flow conditions, corresponding to resonant and non-resonant conditions were studied by Zoccola. 13 Boundary layer measurements yielding profiles upstream of the cavity opening are available and are used in the calculations to prescribe boundary conditions at the upstream end of the domain. As part of the experiments, the pressure on the wall of the cavity was measured simultaneously with the velocities in the shear layer.…”

Section: Baseline Helmholtz Resonator Studiesmentioning

confidence: 99%

“…In order to examine the physics of the underlying flow field associated with such a control concept, a configuration employing these slats was examined by Zoccola. 13 This configuration was also studied computationally to both, validate the flow solver for controlled configurations and to supplement understanding of the flow field obtained from the experiments.…”

Section: Helmholtz Resonator With Slotted Openingmentioning

confidence: 99%

See 2 more Smart Citations

Modeling Approach for Reducing Helmholtz Resonance in Submarine Structures

Arunajatesan

Sinha

2005

11th AIAA/CEAS Aeroacoustics Conference

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“…The geometry studied here corresponds to that examined experimentally by Zoccola 13. A cutout of the geometry illustrating the salient features is shown in Figure 3.…”

Section: Baseline Helmholtz Resonator Studiesmentioning

confidence: 99%

Section: Baseline Helmholtz Resonator Studiesmentioning

confidence: 99%

Section: Helmholtz Resonator With Slotted Openingmentioning

confidence: 99%

See 1 more Smart Citation

Modeling Approach for Reducing Helmholtz Resonance in Submarine Structures

Arunajatesan

Sinha

2005

11th AIAA/CEAS Aeroacoustics Conference

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“…It was first observed in experiments in water channels that long-wavelength instability along perforated and slotted plates can occur without acoustic or gravity wave resonance [21][22][23]. The coupling of this large-scale instability with the acoustic [24] and gravity wave [25] resonance of the bounding cavities was also investigated.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic instability and sound amplification over a perforated plate backed by a cavity

Dai

Aurégan

2019

25th AIAA/CEAS Aeroacoustics Conference

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The long-wavelength hydrodynamic behaviour over a cavity-backed perforated plate, in a duct with a mean shear flow, is studied numerically using the multimodal method, where the acoustic and hydrodynamic disturbances are calculated from the linearized Euler equations. The flow-acoustic coupling near the perforated plate is first solved hole by hole, and results indicate a well-defined large-scale hydrodynamic wave over the plate, with a wavelength close to the plate length at the peak sound amplification frequency when a plane acoustic wave is introduced from the upstream duct. Since the hydrodynamic wavelength is one order larger than the period of the perforation, the effect of the perforated plate is then described by a homogeneous plate impedance. It is shown that the homogenized approach approximately represents the discrete approach in this problem.

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“…Ekmekci and Rockwell (2003) preliminarily reported on its coupling with a resonant mode of the bounding cavity. In parallel with these efforts, Zoccola (2002Zoccola ( , 2004 characterized certain features of coupling between this instability and a resonant mode of the bounding cavity, and, in addition, Zoccola (2004) evaluated, for the first time, an energy integral for these oscillations due to flow past a slotted plate.…”

Section: Introductionmentioning

confidence: 99%