Effects of ripple cross angles and turbulence models on wet curtain resistance

Authors

  • Tao Ding College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;
  • Lumeng Fang 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Beijing Engineering Research Center for Safety and Energy-Saving Technology for Water Supply Network Systems, Beijing 100083, China
  • Zhengxiang Shi 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 3. Key Laboratory of Agricultural Engineering in Structure and Environment, Beijing 100083, China
  • Baoming Li 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 3. Key Laboratory of Agricultural Engineering in Structure and Environment, Beijing 100083, China
  • Yang Zhao 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Beijing Engineering Research Center for Safety and Energy-Saving Technology for Water Supply Network Systems, Beijing 100083, China

Keywords:

wet curtain, ripple cross angle, resistance, turbulence model, ventilation, cooling and humidifying system

Abstract

To study the influence of ripple cross angles on the resistance of wet curtains, wet curtains with different ripple cross angles (45°/45°, 45°/15°) were tested on agricultural ventilation equipment performance testing benches, and the static pressure drop under different wind speeds (1-3 m/s) was determined. Four turbulence models (κ-ε, RNG κ-ε, κ-ω, SST κ-ω) were adopted for numerical simulations of the two types of wet curtain, and the simulations’ results were compared with those of experiments. The average errors found are 41.1%, 48.7%, 27.1%, and 27.8%, respectively, and the κ-ω model is found to be the most suitable one for the calculation of wet curtain resistance among the four turbulence models. By using the κ-ω turbulence model, the static pressure drop performances of wet curtains with ripple cross angles 45°/35° and 45°/25° were calculated. Resistance increases with wind speed and ripple cross angles, and a large ripple cross angle has a higher resistance growth rate with increasing wind speed. Keywords: wet curtain, ripple cross angle, resistance, turbulence model, ventilation, cooling and humidifying system DOI: 10.25165/j.ijabe.20191204.3446 Citation: Ding T, Fang L M, Shi Z X, Li B M, ZhaoY. Effects of ripple cross angles and turbulence models on wet curtain resistance. Int J Agric & Biol Eng, 2019; 12(4): 43–46.

Author Biographies

Tao Ding, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;

Ph.D, Associate Professor. College of Water Resources and Civil Engineering, China Agricultural University,

Lumeng Fang, 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Beijing Engineering Research Center for Safety and Energy-Saving Technology for Water Supply Network Systems, Beijing 100083, China

graduate student College of Water Resources and Civil Engineering, China Agricultural University,

Zhengxiang Shi, 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 3. Key Laboratory of Agricultural Engineering in Structure and Environment, Beijing 100083, China

Ph.D,Professor. College of Water Resources and Civil Engineering, China Agricultural University,

Baoming Li, 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; 3. Key Laboratory of Agricultural Engineering in Structure and Environment, Beijing 100083, China

Ph.D,Professor. College of Water Resources and Civil Engineering, China Agricultural University,

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Published

2019-08-01

How to Cite

Ding, T., Fang, L., Shi, Z., Li, B., & Zhao, Y. (2019). Effects of ripple cross angles and turbulence models on wet curtain resistance. International Journal of Agricultural and Biological Engineering, 12(4), 43–46. Retrieved from https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/3446

Issue

Vol. 12 No. 4 (2019): IJABE

Section

Animal, Plant and Facility Systems

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