Mixing Ventilation in a Full Scale Model ...
Document type :
Communication dans un congrès avec actes
Title :
Mixing Ventilation in a Full Scale Model Room Using a Multi-Orifice Nozzle
Author(s) :
Meslem, Amina [Auteur]
Laboratoire de Génie Civil et Génie Mécanique [LGCGM]
Bragança, Pierre [Auteur]
Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
Labihi, Abdelouhab [Auteur]
Laboratoire de Génie Civil et Génie Mécanique [LGCGM]
Byrne, Paul [Auteur]
Washington University in Saint Louis [WUSTL]
Laboratoire de Génie Civil et Génie Mécanique [LGCGM]
Bragança, Pierre [Auteur]

Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
Labihi, Abdelouhab [Auteur]
Laboratoire de Génie Civil et Génie Mécanique [LGCGM]
Byrne, Paul [Auteur]
Washington University in Saint Louis [WUSTL]
Conference title :
19th International Days on Thermal Science and Energy, JITH 2022
City :
Tangier
Country :
Maroc
Start date of the conference :
2022-11-15
Journal title :
Lecture Notes in Mechanical Engineering
Publisher :
Springer Nature Switzerland
Publication place :
Cham
Publication date :
2024-12-01
English keyword(s) :
Mixing ventilation
Lobed diffuser
Multi-orifice diffuser
Jet
Thermal comfort
Lobed diffuser
Multi-orifice diffuser
Jet
Thermal comfort
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
A commercial multi-orifice diffuser (OD) is compared under the same experimental conditions to a previously validated innovative lobed diffuser (LD). The OD head is a cylindro-spherical surface pierced with 20 orifices ...
Show more >A commercial multi-orifice diffuser (OD) is compared under the same experimental conditions to a previously validated innovative lobed diffuser (LD). The OD head is a cylindro-spherical surface pierced with 20 orifices arranged in three rows leading to efficient jet diffusion. The jet analysis reveals that the flow from the closest two orifice-rows to the ceiling attach to it by Coanda effect whereas the orifice jets from the lower orifice-row are directed towards the occupied zone. Thermal comfort analysis reveals less satisfactory conditions for OD than for LD. In the former case, higher velocities in the occupied zone are responsible of a slightly cold sensation. The recorded pressure loss is higher in OD than in LD, whereas no significant difference was observed in terms of sound pressure level in the occupied zone.Show less >
Show more >A commercial multi-orifice diffuser (OD) is compared under the same experimental conditions to a previously validated innovative lobed diffuser (LD). The OD head is a cylindro-spherical surface pierced with 20 orifices arranged in three rows leading to efficient jet diffusion. The jet analysis reveals that the flow from the closest two orifice-rows to the ceiling attach to it by Coanda effect whereas the orifice jets from the lower orifice-row are directed towards the occupied zone. Thermal comfort analysis reveals less satisfactory conditions for OD than for LD. In the former case, higher velocities in the occupied zone are responsible of a slightly cold sensation. The recorded pressure loss is higher in OD than in LD, whereas no significant difference was observed in terms of sound pressure level in the occupied zone.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :