HIGH-SPEED FLOW VISUALIZATION OF A CANONICAL AIRBLAST ATOMIZER USING SYNCHROTRON X-RAYS - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

HIGH-SPEED FLOW VISUALIZATION OF A CANONICAL AIRBLAST ATOMIZER USING SYNCHROTRON X-RAYS

Résumé

Liquid sprays play a key role in many engineering processes and the dynamics at the nozzle exit have a significant impact on the downstream spray characteristics. However, visualizing the spray in this region is extremely challenging because, under most operating conditions, the spray is optically dense. High intensity white beam X-rays, like those found at the Advanced Photon Source (APS) at Argonne National Laboratory, can be used to produce time-resolved measurements of the liquid-gas structures in the spray near-field region. In this study, high temporal and spatial resolution X-ray images were acquired at the 7-BM beamline at APS of an atomization process using a canonical airblast atomizer consisting of coaxial liquid and gas jets. Unique flow structures were observed under various operating conditions, including bag, ligament, wisp, droplet, and air bubble formation, as well as hollowing of the liquid core into a crown at the liquid needle exit. Conditions where these structures exist are presented and their impact on spray formation are discussed. INTRODUCTION Spraying a liquid into a gaseous environment has many practical applications, including food production, coating and painting, additive manufacturing, fire suppression, agricultural applications, pest control, liquid fuel combustion, and cleaning operations. Spray regions are loosely identified as near-field, mid-field, and far-field, and the demarcation between regions is
Fichier principal
Vignette du fichier
AJKFLUIDS2019-4992.pdf (761.79 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02516289 , version 1 (23-03-2020)

Identifiants

  • HAL Id : hal-02516289 , version 1

Citer

Theodore J Heindel, Timothy R. Morgan, Thomas J Burtnett, Julie K Bothell, Danyu Li, et al.. HIGH-SPEED FLOW VISUALIZATION OF A CANONICAL AIRBLAST ATOMIZER USING SYNCHROTRON X-RAYS. ASME-JSME-KSME 2019 Joint Fluids Engineering Conference, Jul 2019, San Francisco, United States. ⟨hal-02516289⟩
15 Consultations
124 Téléchargements

Partager

Gmail Facebook X LinkedIn More