IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v15y2018i12p2884-d190940.html
   My bibliography  Save this article

Study on Flow Field Characteristics of the 90° Rectangular Elbow in the Exhaust Hood of a Uniform Push–Pull Ventilation Device

Author

Listed:
  • Xiang Wu

    (School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China)

  • Lindong Liu

    (School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China)

  • Xiaowei Luo

    (Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China)

  • Jianwu Chen

    (China Academy of Safety Science and Technology, Beijing 100029, China)

  • Jingwen Dai

    (School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China)

Abstract

A uniform push–pull ventilation device can effectively improve indoor air quality (IAQ). The 90° rectangular elbow is an important part of the push–pull ventilation device. This paper analyzes the flow field characteristics of the 90° rectangular elbows under different working conditions. This was done by using computational fluid dynamics (CFD) simulation (Fluent). The flow lines, velocity and pressure distribution patterns of the elbow flow field are revealed in detail. The wind velocity non-uniformity and wind pressure non-uniformity of the 90° rectangular elbows with different coefficients of radius curvature R and rectangular section height h are also compared. The results show that when R ≥ 2.5 h, the wind flow traces inside the elbow are basically parallel lines. At the same time, the average wind velocity and the average wind pressure are stable. Also, the wind velocity non-uniformity and wind pressure non-uniformity decrease with the increase of R. Therefore, considering the space and material loss caused by an increase in radius of curvature, the elbow with R = 2.5 h can be used as the best design structure for the 90° rectangular elbow, which is of great significance for improving the control effect of dust and toxic pollutants in a uniform push–pull ventilation device.

Suggested Citation

  • Xiang Wu & Lindong Liu & Xiaowei Luo & Jianwu Chen & Jingwen Dai, 2018. "Study on Flow Field Characteristics of the 90° Rectangular Elbow in the Exhaust Hood of a Uniform Push–Pull Ventilation Device," IJERPH, MDPI, vol. 15(12), pages 1-12, December.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:12:p:2884-:d:190940
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/15/12/2884/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/15/12/2884/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Alessandra Cincinelli & Tania Martellini, 2017. "Indoor Air Quality and Health," IJERPH, MDPI, vol. 14(11), pages 1-5, October.
    2. Pier Mannuccio Mannucci & Massimo Franchini, 2017. "Health Effects of Ambient Air Pollution in Developing Countries," IJERPH, MDPI, vol. 14(9), pages 1-8, September.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Lindong Liu & Cuifeng Du & Yuan Wang & Jianwu Chen & Bin Yang & Weibo Jin, 2023. "Simulation Experiment Research of Mine Roadway Simulating Test Device with Adjustable Wind Velocity and Temperature and Humidity," IJERPH, MDPI, vol. 20(5), pages 1-11, February.
    2. Jianwu Chen & Longzhe Jin & Zhenfang Chen & Bin Yang & Yanqiu Sun & Shulin Zhou, 2020. "Center-Line Velocity Change Regime in a Parallel-Flow Square Exhaust Hood," IJERPH, MDPI, vol. 17(12), pages 1-11, June.
    3. Jianwu Chen, 2022. "Changing Patterns of the Flow Ratio with the Distance of Exhaust and Supply Hood in a Parallel Square Push-Pull Ventilation," IJERPH, MDPI, vol. 19(5), pages 1-10, March.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Myung-Jae Hwang & Jong-Hun Kim & Hae-Kwan Cheong, 2020. "Short-Term Impacts of Ambient Air Pollution on Health-Related Quality of Life: A Korea Health Panel Survey Study," IJERPH, MDPI, vol. 17(23), pages 1-11, December.
    2. Christiane Berger & Ardeshir Mahdavi & Elie Azar & Karol Bandurski & Leonidas Bourikas & Timuçin Harputlugil & Runa T. Hellwig & Ricardo Forgiarini Rupp & Marcel Schweiker, 2022. "Reflections on the Evidentiary Basis of Indoor Air Quality Standards," Energies, MDPI, vol. 15(20), pages 1-18, October.
    3. Mengting Liao & Yi Xiao & Shenxin Li & Juan Su & Ji Li & Bin Zou & Xiang Chen & Minxue Shen, 2022. "Synergistic Effects between Ambient Air Pollution and Second-Hand Smoke on Inflammatory Skin Diseases in Chinese Adolescents," IJERPH, MDPI, vol. 19(16), pages 1-12, August.
    4. Jagriti Saini & Maitreyee Dutta & Gonçalo Marques, 2020. "Indoor Air Quality Monitoring Systems Based on Internet of Things: A Systematic Review," IJERPH, MDPI, vol. 17(14), pages 1-22, July.
    5. Ahmad Alkhatib & Lawrence Achilles Nnyanzi & Brian Mujuni & Geofrey Amanya & Charles Ibingira, 2021. "Preventing Multimorbidity with Lifestyle Interventions in Sub-Saharan Africa: A New Challenge for Public Health in Low and Middle-Income Countries," IJERPH, MDPI, vol. 18(23), pages 1-14, November.
    6. Da-Jiun Wei & Wen-Te Liu & Huin-Tsung Chin & Ching-Hsing Lin & I-Chun Chen & Yi-Tang Chang, 2021. "An Investigation of Airborne Bioaerosols and Endotoxins Present in Indoor Traditional Wet Markets before and after Operation in Taiwan: A Case Study," IJERPH, MDPI, vol. 18(6), pages 1-21, March.
    7. Laurentiu Predescu & Daniel Dunea, 2021. "Performance Evaluation of Particulate Matter and Indoor Microclimate Monitors in University Classrooms under COVID-19 Restrictions," IJERPH, MDPI, vol. 18(14), pages 1-19, July.
    8. Wei Chen & Jian Chen & Guopeng Yin, 2022. "Exploring side effects of ridesharing services in urban China: role of pollution–averting behavior," Electronic Commerce Research, Springer, vol. 22(4), pages 1007-1034, December.
    9. Ewa Brągoszewska & Izabela Biedroń, 2018. "Indoor Air Quality and Potential Health Risk Impacts of Exposure to Antibiotic Resistant Bacteria in an Office Rooms in Southern Poland," IJERPH, MDPI, vol. 15(11), pages 1-17, November.
    10. Mattia Acito & Cristina Fatigoni & Milena Villarini & Massimo Moretti, 2022. "Cytogenetic Effects in Children Exposed to Air Pollutants: A Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 19(11), pages 1-17, May.
    11. Daniela Varrica & Maria Grazia Alaimo, 2022. "Determination of Water-Soluble Trace Elements in the PM 10 and PM 2.5 of Palermo Town (Italy)," IJERPH, MDPI, vol. 20(1), pages 1-13, December.
    12. Sylvester Dodzi Nyadanu & Gizachew Assefa Tessema & Ben Mullins & Bernard Kumi-Boateng & Michelle Lee Bell & Gavin Pereira, 2020. "Ambient Air Pollution, Extreme Temperatures and Birth Outcomes: A Protocol for an Umbrella Review, Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 17(22), pages 1-18, November.
    13. Dalia M. Muñoz-Pizza & Mariana Villada-Canela & M. A. Reyna & José Luis Texcalac-Sangrador & Jesús Serrano-Lomelin & Álvaro Osornio-Vargas, 2020. "Assessing the Influence of Socioeconomic Status and Air Pollution Levels on the Public Perception of Local Air Quality in a Mexico-US Border City," IJERPH, MDPI, vol. 17(13), pages 1-22, June.
    14. Filippo Graziani & Rossana Izzetti & Lisa Lardani & Michele Totaro & Angelo Baggiani, 2021. "Experimental Evaluation of Aerosol Production after Dental Ultrasonic Instrumentation: An Analysis on Fine Particulate Matter Perturbation," IJERPH, MDPI, vol. 18(7), pages 1-10, March.
    15. Balasooriya, Namal N. & Bandara, Jayatilleke S. & Rohde, Nicholas, 2022. "Air pollution and health outcomes: Evidence from Black Saturday Bushfires in Australia," Social Science & Medicine, Elsevier, vol. 306(C).
    16. Cuong Hoang Quoc & Giang Vu Huong & Hai Nguyen Duc, 2020. "Working Conditions and Sick Building Syndrome among Health Care Workers in Vietnam," IJERPH, MDPI, vol. 17(10), pages 1-11, May.
    17. Jelonia T. Rumph & Victoria R. Stephens & Joanie L. Martin & LaKendria K. Brown & Portia L. Thomas & Ayorinde Cooley & Kevin G. Osteen & Kaylon L. Bruner-Tran, 2022. "Uncovering Evidence: Associations between Environmental Contaminants and Disparities in Women’s Health," IJERPH, MDPI, vol. 19(3), pages 1-22, January.
    18. Ricky Camplain & Monica R. Lininger & Julie A. Baldwin & Robert T. Trotter, 2021. "Cardiovascular Risk Factors among Individuals Incarcerated in an Arizona County Jail," IJERPH, MDPI, vol. 18(13), pages 1-13, June.
    19. Qin Song & Yu-Jun Zheng & Jun Yang, 2019. "Effects of Food Contamination on Gastrointestinal Morbidity: Comparison of Different Machine-Learning Methods," IJERPH, MDPI, vol. 16(5), pages 1-12, March.
    20. Karl Kilbo Edlund & Felicia Killman & Peter Molnár & Johan Boman & Leo Stockfelt & Janine Wichmann, 2021. "Health Risk Assessment of PM 2.5 and PM 2.5 -Bound Trace Elements in Thohoyandou, South Africa," IJERPH, MDPI, vol. 18(3), pages 1-11, February.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:15:y:2018:i:12:p:2884-:d:190940. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.