"A low-resistance elbow with a bionic sawtooth guide vane in ventilatio" by Chi Zhang, Angui Li et al.

Building Simulation: An International Journal

Article Title

A low-resistance elbow with a bionic sawtooth guide vane in ventilation and air conditioning systems

Authors

Chi Zhang, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology (XAUAT), Xi'an 710055, China
Angui Li, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology (XAUAT), Xi'an 710055, China; The Artificial Environment Control Technology Achievement Innovation Center of XAUAT and Yantai, Yantai 264006, China
Jigang Che, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology (XAUAT), Xi'an 710055, China
Yue Li, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology (XAUAT), Xi'an 710055, China
Qi Liu, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology (XAUAT), Xi'an 710055, China
Yuhang Zhao, School of Building Services Science and Engineering, Xi'an University of Architecture and Technology (XAUAT), Xi'an 710055, China

Keywords

bionic, sawtooth grooves, guide vane, resistance, entropy production

Abstract

Elbow resistance is an important part of energy consumption in ventilation and air conditioning (VAC) systems. By considering the structural characteristics of bat wings and humpback whale pectoral fins, a simplified leading edge for sawtooth guide vanes is designed. Based on the theory of fluid mechanics, the resistance reduction mechanism of the sawtooth guide vane is analyzed. The numerical calculation results show that proper sawtooth groove parameters for the guide vane can effectively reduce the elbow resistance. Compared with that for a normal guide vane, the maximum resistance can be reduced by approximately 9% with the new design. In addition, we analyze the influence of the sawtooth guide vane on the entropy production of the duct elbow and the relationship between entropy production and the resistance of the duct elbow. Finally, the resistance reduction performance of the sawtooth guide vane is verified through full-scale tests.

Recommended Citation

Zhang, Chi; Li, Angui; Che, Jigang; Li, Yue; Liu, Qi; and Zhao, Yuhang (2022) "A low-resistance elbow with a bionic sawtooth guide vane in ventilation and air conditioning systems," Building Simulation: An International Journal: Vol. 15: Iss. 1, Article 9.
DOI: https://doi.org/10.1007/s12273-021-0782-y
Available at: https://dc.tsinghuajournals.com/building-simulation/vol15/iss1/9

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