Wind pressure distribution and non-Gaussian characteristics of a building complex with tree-inspired structures

Zhao, Yongfei; Yang, Yang; Li, Mingshui

doi:10.1016/j.jobe.2024.108660

Journal of Building Engineering

2024

DOI: 10.1016/j.jobe.2024.108660

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Wind pressure distribution and non-Gaussian characteristics of a building complex with tree-inspired structures

Yongfei Zhao,

Yang Yang,

Mingshui Li

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2024

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Cited by 3 publications

References 43 publications

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2D Aerodynamic Admittances of a Streamlined Box Bridge Deck in Various Turbulent Flows

Zhao,

Yang,

et al. 2024

J. Bridge Eng.

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2D Aerodynamic Admittances of a Streamlined Box Bridge Deck in Various Turbulent Flows

Zhao,

Yang,

et al. 2024

J. Bridge Eng.

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Harmonically pitching airfoil in a periodic streamwise superimposed flow

Yang,

Zhao,

Wang

et al. 2024

Physics of Fluids

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The unsteady lift of a NACA (National Advisory Committee for Aeronautics) 0015 airfoil with harmonic pitching frequency fα encountering periodic streamwise superimposed flow is investigated via a wind tunnel test. An extended method for predicting the unsteady lift characteristics of a pitching airfoil under incoming flow superimposed of various sinusoidal flow with multiple frequencies fu is presented and experimentally verified. The spectral result of the experiment confirms the existence of the sum frequency fα+fu and the difference frequency |fα−fu|, indicating that the pitch motion frequency and the sinusoidal flow frequency interact as Greenberg's theory. The amplitude and phase of unsteady lift in the frequency of pitching motion would not change with the change of sinusoidal streamwise flow. In the situation of periodic superimposed flow, it is seen that the sinusoidal inflow components of various frequencies do not interact with the pitching frequency together. This means that there were neither |fα−fu1−fu2| nor fα+fu1+fu2 present in an incoming flow superimposed of two sinusoidal flow with different frequencies, fu1 and fu2. The results of all cases indicate that the amplitude and phase of a frequency combined of pitching frequency and fu1 or fu2 in a periodic superimposed flow are the same as those of corresponding frequency in a sinusoidal streamwise flow under the condition of small disturbance. The Fourier amplitude spectra further corroborate this result by showing that superposition can be used to estimate the unsteady lift in the situation of periodic superimposed flow.

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Analysis of green belt designs in mitigating anthropogenic heat emission from buildings by considering cooling efficiency and nurture costs

Cui,

Fan,

Zhou

et al. 2024

Indoor and Built Environment

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Building anthropogenic heat emission is one of the key factors contributing to both building thermal environment and urban heat island, which can potentially lead to increasement of building energy consumption and carbon emission. Mitigating this heat through green belts is an effective solution to achieving low carbon development in buildings. Therefore, this study analyzed the impact of the location and type of green belts around buildings on the thermal environment around buildings. A co-benefit assessment model was developed to quantify green belt design parameters based on the identification of optimal green belt types and locations. Results showed the building thermal environment was significantly influenced by anthropogenic heat emission, leading to a maximum increase of 3.4°C in air temperature. Compared with buildings without green belts, the optimal green belt design (i.e. lawns, shrubs and trees configuration) could decrease the temperature around the building by 1.85°C, while the cooling efficiency reached 47.20%. The optimal lawn area distance was determined to be 0.5 S (S is the building’s footprint), the optimal shrub length was found at 0.6 L to 0.8 L (L is the length of the building), while the optimal tree spacing distance was determined to be 3.5 m to 4.0 m in this study.

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Wind pressure distribution and non-Gaussian characteristics of a building complex with tree-inspired structures

Cited by 3 publications

References 43 publications

2D Aerodynamic Admittances of a Streamlined Box Bridge Deck in Various Turbulent Flows

2D Aerodynamic Admittances of a Streamlined Box Bridge Deck in Various Turbulent Flows

Harmonically pitching airfoil in a periodic streamwise superimposed flow

Analysis of green belt designs in mitigating anthropogenic heat emission from buildings by considering cooling efficiency and nurture costs

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