Simulation of Surface Pressure Fluctuations on an Airbus-A320 Fuselage at Cruise Conditions

Hu, Naifei; Appel, Christina; Haxter, Stefan; Callsen, Sören; Klabes, Alexander

doi:10.2514/1.j059284

Cited by 4 publications

(1 citation statement)

References 35 publications

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“…where the pre-factor c τ needs to be empirically determined. By comparing the streamwise coherence of wall pressure fluctuations, Hu et al 28,29 suggested c τ = 1.2 and 2.5. The former value was determined with a wall pressure fluctuations simulation for a low Reynolds number ZPG flow, and the latter for an aircraft fuselage flow at cruise conditions.…”

Section: Methods and Mean Flow Conditionsmentioning

confidence: 99%

CFD-based study on one- and two-point statistics of wall pressure fluctuations

2022

28th AIAA/CEAS Aeroacoustics 2022 Conference

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This paper presents a study on the statistics of wall pressure fluctuations with the socalled TNO-Blake model. The focus is on the statistics which have essential importance for the surface structural vibration, such as the one-point and wavenumber-frequency spectra, the coherence lengths and the convection velocity of the wall pressure field. The turbulent-boundary-layer (TBL) parameters which needed for the model are provided by RANS calculations. Calculations were carried out for zero pressure gradient flows with two velocities and an adverse pressure gradient flow, illustrating Reynolds number and pressure gradient effects. The effects on the one-point spectra, especially the contribution from different wall-normal positions across TBL, and on two-point statistics are discussed. Furthermore, the impact of different formulations for the velocity spectrum and moving axis spectrum on the wall pressure statistics is demonstrated.

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Section: Methods and Mean Flow Conditionsmentioning

confidence: 99%

CFD-based study on one- and two-point statistics of wall pressure fluctuations

2022

28th AIAA/CEAS Aeroacoustics 2022 Conference

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Sensor-size-related attenuation correction of wall pressure spectra measurements

2022

Physics of Fluids

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A correction model is presented for sensor-size-related high-frequency attenuation when measuring the wall pressure fluctuations beneath turbulent boundary layers. The model is developed based on the wall pressure spectra measured on a flat plate model, using sensors of different sizes and types. The measurement covers the range of Reynolds numbers, $Re_\theta$, based on the momentum thickness between 1500 and 11400, including flows with adverse and favorable pressure gradients which were produced by a National Advisory Committee for Aeronautics (NACA) 0012 airfoil installed above the flat plate. The present model follows the principle of the Corcos correction and is expressed with a simple mathematical form. Major improvements compared to the Corcos correction are made with regard to determining the effective sensing area and the convection velocity for a specific sensor. With the help of convection velocity modeling, the present correction model can be applied to flows in pressure gradients with high accuracy. To assess the generality of the assumptions, the model is used to correct the wall pressure spectra measured at different test facilities with different sensor types, covering a large range of Reynolds numbers, $1.6{}\times{}10^3<Re_\theta<1.19{}\times{}10^5$.

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