Boundary layer wind tunnel modeling experiments on pumping ventilation through a three-story reduce-scaled building with two openings

Zhong, Huai-Yu; Lin, Chao; Sun, Yang; Kikumoto, Hideki; Ooka, Ryozo; Zhang, Hongliang; Hu, Hengshan; Zhao, Fu-Yun; Jimenez-Bescos, Carlos

doi:10.1016/j.buildenv.2021.108043

Cited by 18 publications

(7 citation statements)

References 45 publications

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“…Similar WTs were also performed by Zhong et al [111] to discuss the effect of different opening separations and ventilating floors. The results of WTs proved that ventilation rate is greater than that of single opening with the identical total opening area.…”

Section: Existing Studies On Pvmentioning

confidence: 67%

Single-sided natural ventilation in buildings: a critical literature review

Zhong

Sun

Shang

et al. 2022

Building and Environment

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Section: Existing Studies On Pvmentioning

confidence: 67%

Single-sided natural ventilation in buildings: a critical literature review

Zhong

Sun

Shang

et al. 2022

Building and Environment

Self Cite

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“…Increasing the leeward opening rate of the downstream building will increase the St number, but it has no positive effect on the ventilation. Furthermore, Zhong 82 pointed out that the airflow rate of the bottom and top floors due to the greater impact of vortex shedding was different from that of the middle floor.…”

Section: Turbulent Ventilation Mechanisms and Discussionmentioning

confidence: 99%

“…According to Daniel, 77 the following problems were not considered in the study of Zhong et al 78–82 :(1) The 3D structure of the pumping ventilation flow mechanism in buildings.(2) The influence of the vertical component of the wake region caused by the roof of the building.(3) The influence of the atmospheric boundary layer.…”

Section: Turbulent Ventilation Mechanisms and Discussionmentioning

confidence: 99%

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Review of calculating models of unsteady natural ventilation rate due to wind fluctuations

Xue

Zhou

2022

Indoor and Built Environment

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Natural ventilation is an important form of sustainable building technique that can be used to adjust the indoor environment to ensure indoor thermal comfort and maintain acceptable indoor air quality. Correct estimation of the ventilation rate is a necessary step in natural ventilation design. Natural wind fluctuation and interaction between the wind and buildings determine models of mean flow rate inaccuracy in predicting actual ventilation. In this paper, a summary of calculation models for unsteady natural ventilation is given. Unsteady natural ventilation mechanisms are classified into continuous airflow, pulsating flow, eddy penetration and diffusion phenomena. The theories of different ventilation mechanisms and the differences between various research reports are expounded and discussed. Additionally, an in-situ measurement of the eddy penetration caused by wind turbulence at the opening was conducted to verify the proposed model. The actual application condition of different eddy penetration models is proposed via the comparison between previous models. With respect to the ‘pumping’ mechanism, this is regarded as a special type of eddy penetration for the first time. Research on ‘pumping’ airflow has just started, the mechanism and influencing factors of which will need to be further explored.

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“…Because of the difficulty of obtaining relevant measurements, integrated dust samplers have historically been the most common method for measuring sand dust fluxes in the field and in laboratory investigations [16][17][18]. Different researchers have designed various types of sand samplers [19][20][21][22] to study the horizontal and vertical fluxes of dust transport in the near strata [23][24][25][26][27][28][29][30][31][32][33][34][35], and they are widely used to obtain sand transport measurements in field and in wind tunnel experiments [36][37][38][39]. Initial designs were improved by increasing the sampling efficiency through taking account of the aerodynamics associated with blocking a portion of the flow [17].…”

Section: Introductionmentioning

confidence: 99%

Application of a High-Precision Aeolian Sand Collector in Field Wind and Sand Surveys

Liu

Kang

Chen³

et al. 2021

IJERPH

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Sand collectors are important for quantitatively monitoring aeolian sand activities. In this paper, an automatic high-precision sand collector was designed. Based on the measured data of aeolian transport performed with a piezoelectric saltation sensor (H11-Sensit) and a 10 m high meteorological tower, the sampling efficiency of the automatic sand sampler and the horizontal dust flux of the near surface were analyzed based on observed data. The results were as follows: the best-fitting function between the number of impacting sand particles and the amount of collected sand was a linear relationship. The average value of R2 was 0.7702, and the average sand collection efficiency of the sand collector at a height of 5 cm was 94.3%, indicating good sand collection performance. From all field tests conducted so far, it appeared that a high-precision sand sampler was a useful device for making field measurements of horizontal dust fluxes and ascertaining the relationship between transition particles and wind speed. In the future, the equipment costs and wind drive will continue to be optimized.

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Boundary layer wind tunnel modeling experiments on pumping ventilation through a three-story reduce-scaled building with two openings

Cited by 18 publications

References 45 publications

Single-sided natural ventilation in buildings: a critical literature review

Single-sided natural ventilation in buildings: a critical literature review

Review of calculating models of unsteady natural ventilation rate due to wind fluctuations

Application of a High-Precision Aeolian Sand Collector in Field Wind and Sand Surveys

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