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- W3170375703 abstract "Pumping ventilation is a special single-sided wind driven building ventilation induced by periodic vortex shedding at the building wake. This work aimed to investigate the oscillating frequency at the building façade opening and ventilation rate of pumping ventilation. The effects of opening separations on different floors of a three-story reduce-scaled building with two openings were considered using boundary-layer wind tunnel experiments. The wind velocity of the surrounding flow field and the center of the opening were measured. The ventilation rate was obtained by tracer gas method with constant and continuous injection rate. The results showed that the oscillating frequency was independent of the opening separation except on the third floor probably because of the disturbance of the rooftop shedding frequency. The oscillating frequency on the first floor was the lowest due to the resistance of the ground to the vortex shedding. Pumping ventilation indicated that its ventilation rate is greater than that of general ventilation across the single opening with the same total opening area. The promotion of ventilation rate was up to about 123% on the first floor, about 65% on the second floor and about 44% on the third floor. Expansion of opening separations could boost the ventilation rate. Meanwhile, the fluctuation of opening center wind velocity and indoor species concentration were not positively correlated with the ventilation rate of pumping ventilation. Conclusions of this research could provide some useful reference to the design of natural ventilation for buildings. • Wind tunnel experiments on pumping ventilation were conducted with reduced scale models. • Influence of opening separations and ventilating floors were experimentally investigated. • The promotion of ventilation rate could be up to about 123% from SS1 to SS2. • Pumping ventilation could be applied for future low carbon built environment." @default.
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- W3170375703 date "2021-09-01" @default.
- W3170375703 modified "2023-10-05" @default.
- W3170375703 title "Boundary layer wind tunnel modeling experiments on pumping ventilation through a three-story reduce-scaled building with two openings" @default.
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- W3170375703 doi "https://doi.org/10.1016/j.buildenv.2021.108043" @default.
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