TR-PIV measurements and POD analysis of the plane wall jet subjected to lateral perturbation
| العنوان: | TR-PIV measurements and POD analysis of the plane wall jet subjected to lateral perturbation |
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| المؤلفون: | Jean Moureh, Jean-Luc Harion, Ahmed Kaffel, Serge Russeil |
| المساهمون: | Institut TELECOM/TELECOM Lille1, Institut Mines-Télécom [Paris] (IMT), Département Technologie des Polymères et Composites & Ingénierie Mécanique (TPCIM), École des Mines de Douai (Mines Douai EMD), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Ministère de l'Economie, des Finances et de l'Industrie, Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut National de Recherche en Sciences et Technologies pour l'Environnement et l'Agriculture (IRSTEA) |
| المصدر: | Experimental Thermal and Fluid Science Experimental Thermal and Fluid Science, Elsevier, 2016, 77, pp.71-90. ⟨10.1016/j.expthermflusci.2016.04.001⟩ |
| بيانات النشر: | HAL CCSD, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | General Chemical Engineering, Aerospace Engineering, Perturbation (astronomy), 02 engineering and technology, Kelvin–Helmholtz instabilities, 01 natural sciences, 010305 fluids & plasmas, Root mean square, Physics::Fluid Dynamics, symbols.namesake, [SPI]Engineering Sciences [physics], 0203 mechanical engineering, 0103 physical sciences, POD, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, ComputingMilieux_MISCELLANEOUS, Fluid Flow and Transfer Processes, Physics, Turbulence, Mechanical Engineering, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, Aerodynamics, Mechanics, Vortex shedding, Wall jet, Vortex, TR-PIV, 020303 mechanical engineering & transports, Coherent structures, Nuclear Energy and Engineering, Particle image velocimetry, symbols, Strouhal number |
| الوصف: | International audience; An experimental investigation has been carried out using time resolved particle image velocimetry(TR-PIV) to investigate the aerodynamic behavior of a wall jet subjected to external lateral stream(ELS). The experiments are performed on a reduced-scale model representing a generic configurationof a refrigerated display cabinet (RDC) by focusing on the near-field region downstream the nozzle exit(x/e < 10) where strong interactions are expected between the jet core, wall boundary and external lateralstream. Comparisons of experimental data obtained with and without external perturbation make itpossible to quantify the effect of the perturbation on the time-averaged wall jet characteristics such asairflow patterns, mean velocity and root mean square (RMS) of velocity fluctuations, Reynolds shearstress, space correlations and the development of primary and secondary instabilities. The vortex sheddingfrequency of the perturbed wall jet has been assessed through a spectral analysis. It was found thatthe Strouhal number decreases with an increase of lateral-flow velocity, indicating an inhibiting effectexerted by the lateral flow on the formation and the development of Kelvin–Helmholtz (K–H) vorticesin the outer shear layer. This paper also gives an insight into the altered behavior of coherent structuresrelated to perturbed jet in terms of topology, alignment, trajectory and vortex shedding frequency. Thebreak-up of vortex filaments in the braid region and its effect on the pairing process and the mutual interactionbetween inner and outer layer vortices has also been discussed. A proper orthogonal decomposition(POD) analysis has been performed showing the role of the ELS in redistributing the energy contentin favor of small length scales and in the emerging of less well-organized structures. |
| اللغة: | English |
| تدمد: | 0894-1777 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d16b2b17638b63d57a27965335e233d https://hal.archives-ouvertes.fr/hal-02538992 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....1d16b2b17638b63d57a27965335e233d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 08941777 |
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