CFD simulation of airflow characteristics of swirling floor diffusers

H. T. Xu, Jianlei Niu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Air supply diffusers used in air-conditioning systems can be classified as ceiling diffusers, side-wall diffusers, floor diffusers, jet nozzles, and low velocity displacement diffusers. Fixed or adjustable slats are usually used to control airflow directions. Recently, swirling vanes are used in floor diffusers to create swirling out-flow jet, so that more rapid mixing with ambient air can be achieved. the latest CFD technique to investigate the impact of these different designs on thermal comfort in the near nozzle region is used, in view of the increasing application of floor-level air supply systems. The preliminary simulation results indicate that raising air supply temperature from 18°C to 22°C or reducing the air supply velocity from 1.5 m/s to 1.0 m/s, can provide better thermal comfort in terms of thermal field uniformity. The results was further validated with experiments, and the method can be used to optimize diffuser designs.
Original languageEnglish
Title of host publicationProceedings of the 2003 - 4th International Symposium on Heating, Ventilating and Airconditioning
Pages205-209
Number of pages5
Publication statusPublished - 1 Dec 2003
EventProceeding of the 2003 4th International Symposium on Heating, Ventilating and Air Conditioning - Beijing, China
Duration: 9 Oct 200311 Oct 2003

Conference

ConferenceProceeding of the 2003 4th International Symposium on Heating, Ventilating and Air Conditioning
CountryChina
CityBeijing
Period9/10/0311/10/03

Keywords

  • Air distribution
  • CFD simulation
  • Underfloor air supply

ASJC Scopus subject areas

  • Engineering(all)

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