Experimental investigation the turbulent kinetic energy and the acoustic field in a rectangular jet impinging a slotted plate

Assoum, Hassan; Hamdi, Jana; Abed-Meraïm, Kamel; Hassan, Mouhammad El; Hammoud, Ali; Sakout, Anas

doi:10.1016/j.egypro.2017.11.228

Cited by 9 publications

(8 citation statements)

References 14 publications

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“…2 . Therefore, the change as a function of time of TKE was calculated in the volume shown in Figure 9(b) in such a way that it contained the vortices which hit the wall, as described previously by [21]. Therefore, the sum of In the present work, 3D High Speed Tomographic-PIV was performed at a sampling rate of 2 KHz.…”

Section: Resultsmentioning

confidence: 99%

“…Many studies have been performed to study self-sustaining tones or to estimate the turbulence kinetic energy produced in 2D-PIV. Assoum et al [21] used 2D PIV which leads to incomplete results because azimuthal component of velocity has an important effect in these configurations. Alekseenko et al [22] also considered the Turbulent Kinetic Energy in an impinging jet and the authors calculated the dissipation term from instantaneous Stereo-PIV velocity fields in order to compare swirling and non-swirling impinging jets.…”

Section: Introductionmentioning

confidence: 99%

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Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry

Assoum¹,

Hamdi²,

Hassan³

et al. 2020

JMES

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Impinging jets are widely used in ventilation systems to improve the mixing and diffusion of airflows. When a rectangular jet hits a slotted plate, an acoustic disturbance can be generated and self-sustained tones produced. Few studies have looked at the Turbulent Kinetic Energy (TKE) produced by the aerodynamic field in such configurations and in the presence of self-sustaining tones. The aim of this work is to investigate the energy transfer between the aerodynamic and acoustic fields generated in a rectangular jet impinging on a slotted plate. The present paper methodology is based on experimental data measurements using 3D tomographic Particle Image Velocimetry (PIV) technique and microphones. It was found that the spectrum of the TKE for Re=5294 (configuration of self-sustained tones) is which is smaller than that of the acoustic signal . A negative peak of correlation is obtained between the acoustic signal and TKE for These results may lead to conclude that the acoustic cycle should be covered by the TKE period and the two signals of both fields are in opposition of phase in order to obtain an optimal configuration for energy transfer.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry

Assoum¹,

Hamdi²,

Hassan³

et al. 2020

JMES

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show abstract

“…Experimental studies on impinging jets was discussed by [1] and [2] who was the first to perform a comprehensive study in the sense of providing both the mean and turbulence characteristics of the flow. [3] treated this configuration experimentally using the time-resolved PIV technique. This technique is used to measure the 2D velocity vector.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Dynamics of Parallel Planes in a Confined Jet Impinging on a Slotted Plate Using TR-PIV measurements

Hamdi

Assoum

Alkheir

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Ventilation systems implemented in buildings form the configuration of impinging jets where the airflow impacts obstacles with different slots. The bad choice of initial conditions such as confinement may cause acoustic incompatibility. Hence, to control these noises in buildings, a 3D experimental study of the impinging jet should be performed to develop its structural characteristics. For this reason, Time Resolved Particle Image Velocimetry (TR-PIV) experiments were carried out on an impinging jet on a slotted plate. Data were acquired on a series of twenty-two parallel planes orthogonal to the slot of the plate, for a Reynolds number of 4458 and a sampling frequency of 5 kHz. The 3D analysis of the flow is carried out in the present paper by discussing the kinematic field of planes in the central and intermediate part of the jet without considering the planes at the edge of the slot. The normalized field of the mean velocity and the turbulence rate of all these planes were presented. The results have shown for a Reynolds number Re = 4458 and a confinement of L/H=4 the flow is two dimensional where the averaged kinematic fields are the same from the midplane P0 until plane P60.

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“…He observed a creation of turbulent structures closest to the outlet with the elliptical jet with the rectangular and circular jet. Furthermore, the consequence of other studie indicated that the jet's nozzle engineering plays crucial and final role in contributing the augment of noise reduction technique [7].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of asymmetric and axisymmetric thermal jet with entropy generation concept

Belakhal¹,

Kouider²,

Elkaroui³

et al. 2021

JMES

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In the current investigation, numerical study of a thermal jet of asymmetric (rectangular and elliptical) and axisymmetric (circular) geometry was investigated with variable density to verify the impact of the ratio of density and geometry on the generation of entropy. The central jet was brought to different temperatures (194, 293 and 2110 K) to obtain density ratios (0.66, 1 and 7.2) identical to a mixture jet ((Air-CO2), (Air-Air) and (Air-He)), respectively. Solving the three-dimensional numerical resolution of the Navier Stocks for turbulent flow permanent enclosed on the turbulence model K-εstandard was made. The results acquired are compared with that carried out in previous experimental studies, where it was concluded that, the axisymmetric (circular) geometry increases the entropy generation.

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Experimental investigation the turbulent kinetic energy and the acoustic field in a rectangular jet impinging a slotted plate

Cited by 9 publications

References 14 publications

Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry

Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry

Comparison of the Dynamics of Parallel Planes in a Confined Jet Impinging on a Slotted Plate Using TR-PIV measurements

Numerical study of asymmetric and axisymmetric thermal jet with entropy generation concept

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