IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v15y2022i16p5834-d885986.html
   My bibliography  Save this article

Influence of Local Gas Sources with Variable Density and Momentum on the Flow of the Medium in the Conduit

Author

Listed:
  • Bogusław Ptaszyński

    (Faculty of Civil Engineering and Resource Management, AGH University of Science and Technology, 30-059 Krakow, Poland
    Retired employee.)

  • Rafał Łuczak

    (Faculty of Civil Engineering and Resource Management, AGH University of Science and Technology, 30-059 Krakow, Poland)

  • Zbigniew Kuczera

    (Faculty of Civil Engineering and Resource Management, AGH University of Science and Technology, 30-059 Krakow, Poland)

  • Piotr Życzkowski

    (Faculty of Civil Engineering and Resource Management, AGH University of Science and Technology, 30-059 Krakow, Poland)

Abstract

In this article, the analysis of mechanical energy changes in a gas medium flow with stable and variable density was presented. To determine the energy losses, the various sources of momentum and mass were used, which had an influence on air flow through the conduit in the system without heat exchange with the environment. The occurrence of varying density gas flow in the conduit (caused by local inflow of mass and momentum) in inclined pipes generates a natural depression–internal mechanical energy. The local momentum sources can facilitate or hinder the gas flow through the conduit. This phenomenon often appears in the network of underground mine workings and in ventilation and air conditioning installations. The characteristic for gas flow through a pipe or mining excavation is the equivalent aerodynamic resistance, the value of which is influenced by the mass and momentum of local sources. This value determines the facilitation or difficulty in gas transport through a section of conduit in relation to the mass stream of the medium. In this article, the dependency of mass flow and gas momentum with different densities on the value of the gas medium flow resistance in the conduit was analyzed. On the basis of the obtained results, the loss of mechanical energy and energy efficiency of flows were determined. In this work, two cases of fan work in suction and blowing modes were analyzed. For these examples, a gas inflow with three different mass streams, a density higher than the main stream density, and with a zero momentum value for this stream was modeled. Ten cases of mass inflow sources were considered. The results of the gas mass flow calculation through the fan m ˙ w and gas m ˙ 0 and the coefficient of transport efficiency are graphically presented in the paper.

Suggested Citation

  • Bogusław Ptaszyński & Rafał Łuczak & Zbigniew Kuczera & Piotr Życzkowski, 2022. "Influence of Local Gas Sources with Variable Density and Momentum on the Flow of the Medium in the Conduit," Energies, MDPI, vol. 15(16), pages 1-14, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:16:p:5834-:d:885986
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/15/16/5834/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/15/16/5834/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Bogusław Ptaszyński & Zbigniew Kuczera & Piotr Życzkowski & Rafał Łuczak, 2022. "Transport Efficiency of a Homogeneous Gaseous Substance in the Presence of Positive and Negative Gaseous Sources of Mass and Momentum," Energies, MDPI, vol. 15(17), pages 1-11, September.
    2. Wacław Dziurzyński & Andrzej Krach & Teresa Pałka, 2017. "Airflow Sensitivity Assessment Based on Underground Mine Ventilation Systems Modeling," Energies, MDPI, vol. 10(10), pages 1-15, September.
    3. Sharma, Sanjay K. & Kalamkar, Vilas R., 2016. "Computational Fluid Dynamics approach in thermo-hydraulic analysis of flow in ducts with rib roughened walls – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 756-788.
    Full references (including those not matched with items on IDEAS)

    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. Joon Ahn, 2023. "Large Eddy Simulation of Flow and Heat Transfer in a Ribbed Channel for the Internal Cooling Passage of a Gas Turbine Blade: A Review," Energies, MDPI, vol. 16(9), pages 1-20, April.
    2. Jie Hou & Gang Nie & Guoqing Li & Wei Zhao & Baoli Sheng, 2023. "Optimization of Branch Airflow Volume for Mine Ventilation Network Based on Sensitivity Matrix," Sustainability, MDPI, vol. 15(16), pages 1-14, August.
    3. Nikodem Szlązak & Marek Korzec, 2022. "The Solution of the Main Fan Station for Underground Mines Being Decommissioned in Terms of Reducing Energy Consumption by Ventilation," Energies, MDPI, vol. 15(13), pages 1-13, June.
    4. Kumar, Rajneesh & Goel, Varun, 2021. "Unconventional solar air heater with triangular flow-passage: A CFD based comparative performance assessment of different cross-sectional rib-roughnesses," Renewable Energy, Elsevier, vol. 172(C), pages 1267-1278.
    5. Bogusław Ptaszyński & Zbigniew Kuczera & Piotr Życzkowski & Rafał Łuczak, 2022. "Transport Efficiency of a Homogeneous Gaseous Substance in the Presence of Positive and Negative Gaseous Sources of Mass and Momentum," Energies, MDPI, vol. 15(17), pages 1-11, September.
    6. Singh, Amritpal & Singh, Sukhmeet, 2017. "CFD investigation on roughness pitch variation in non-uniform cross-section transverse rib roughness on Nusselt number and friction factor characteristics of solar air heater duct," Energy, Elsevier, vol. 128(C), pages 109-127.
    7. Aleksander Król & Małgorzata Król, 2018. "Transient Analyses and Energy Balance of Air Flow in Road Tunnels," Energies, MDPI, vol. 11(7), pages 1-15, July.
    8. Aleksander Król & Małgorzata Król, 2018. "Study on Hot Gases Flow in Case of Fire in a Road Tunnel," Energies, MDPI, vol. 11(3), pages 1-16, March.
    9. Azadani, Leila N. & Gharouni, Nadiya, 2021. "Multi objective optimization of cylindrical shape roughness parameters in a solar air heater," Renewable Energy, Elsevier, vol. 179(C), pages 1156-1168.

    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:jeners:v:15:y:2022:i:16:p:5834-:d:885986. 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.