Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-04-03

Journal: HVAC&R RESEARCH

Included Journals: Scopus、EI、SCIE

Volume: 19

Issue: 3

Page Number: 268-282

ISSN: 1078-9669

Abstract: Airplanes currently distribute conditioned air by overhead diffusers or personal gaspers to the passenger cabin. Such an air distribution mode promotes air mixing; therefore, it has low ventilation efficiency and may impose considerable risks of draft to the passengers. To remedy the above problems, an under-aisle displacement air distribution mode and a personal air distribution mode are proposed. The under-aisle air mode supplies conditioned air from perforated panels in the aisles, whereas the personalized air mode applies the under-aisle air mode as background ventilation and simultaneously supplies outdoor conditioned air from the chairarmrest-embedded terminals to the passenger's inhalation region. To evaluate the three air distribution modes, a twin-aisle aircraft cabin mockup with a Boeing 767 as the prototype is constructed. The airflow pattern and temperature profiles are measured by a three-dimensional ultrasonic anemometer, and the ventilation efficiency is evaluated by the CO2 tracer gas concentration. This study finds that the personalized air distribution mode coupled with the under-aisle air supply as the background ventilation is promising to improve the current cabin environment. Unstable airflows are ubiquitous on airplanes and require advanced test instruments for better characterization.