TY - GEN
T1 - Experimental study on discharge coefficient of outflow opening for predicting cross-ventilation flow rate
AU - Goto, Tomonobu
AU - Ohba, Masaaki
AU - Kurabuchi, Takashi
AU - Endo, Tomoyuki
AU - Akamine, Yoshihiko
AU - Nonaka, Toshihiro
PY - 2007
Y1 - 2007
N2 - Variation of discharge coefficients with wind direction and opening position is one of the main factors debasing accuracy of cross-ventilation flow rate prediction. The local dynamic similarity model was developed to solve this problem, and previous studies had validated it for inflow openings. In the present study, two experiments were carried out to investigate its validity for outflow openings. The experiments showed that the relationships between the discharge coefficient and a dimensionless room pressure P R*, which was originally defined by the model, were independent of wind direction and opening position, although they were dependent on whether or not the outflow opening was in a recirculation flow region. It was thus concluded that the local dynamic similarity model was valid for outflow openings as well as inflow openings.
AB - Variation of discharge coefficients with wind direction and opening position is one of the main factors debasing accuracy of cross-ventilation flow rate prediction. The local dynamic similarity model was developed to solve this problem, and previous studies had validated it for inflow openings. In the present study, two experiments were carried out to investigate its validity for outflow openings. The experiments showed that the relationships between the discharge coefficient and a dimensionless room pressure P R*, which was originally defined by the model, were independent of wind direction and opening position, although they were dependent on whether or not the outflow opening was in a recirculation flow region. It was thus concluded that the local dynamic similarity model was valid for outflow openings as well as inflow openings.
KW - Cross-ventilation
KW - Discharge coefficient
KW - Outflow opening
KW - Wind tunnel experiment
UR - http://www.scopus.com/inward/record.url?scp=84857304273&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84857304273
SN - 9784861630705
T3 - IAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment
SP - 341
EP - 348
BT - IAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings
T2 - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment, IAQVEC 2007
Y2 - 28 October 2007 through 31 October 2007
ER -