| Peer-Reviewed

Design of Mini Wind Tunnel Based on Coanda Effect

Received: 26 September 2014     Accepted: 27 September 2014     Published: 7 October 2014
Views:       Downloads:
Abstract

An experimental investigation and CFD treatment were employed to design mini-wind tunnel based on Coanda effect for model tests and basic research. The inlet source flow is efficiently creating smooth steady airflow with acceptable noise, achieving the possibility of placing the test target closer to the source of flow with reasonable estimates of turbulence intensity. The design aims at achieving flow uniformity in the working section midplane, preventing separation in the contraction and minimizing the boundary–layer thickness. Intensive measurements after construction demonstrate the significance of the design process and validate the CFD predictions. The results are represented in graphic form to indicate the aspects of the contraction ratio. The numerical and experimental results show the uniformity of velocity distribution inside the working section. Tracing of separation and backflow is crucial allowing a variety of realistic demonstrations to be performed. The numerical solution provides a powerful tool to demonstrate the rate of boundary–layer growth inside the working section and validate against the empirical correlations with insignificant wall–friction drag. Assessment study to address large–scale wind tunnel based on coanda effect would be considered.

Published in American Journal of Aerospace Engineering (Volume 2, Issue 1-1)

This article belongs to the Special Issue Hands-on Learning Technique for Multidisciplinary Engineering Education

DOI 10.11648/j.ajae.s.2015020101.13
Page(s) 31-37
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Separation, CFD, Coanda Effect, Mini–Wind–Tunnel, Boundary–Layer Growth

References
[1] Bradshaw, P., and Pankhurst, R. C., "The design of low-speed wind tunnels", Progress in aeronautical sciences 6, 1 – 69, 1964.
[2] Mehta, R.D., "Aspects of the Design and Performance of Blower Wind Tunnels Components", Ph.D. Thesis, Department of Aeronautics, Imperial College, University of London, 1978.
[3] Mehta, R.D. and Bradshaw, P., "Design Rules for Small Low Speed Wind Tunnels", Aeronaut. J., Vol. 83, No. 827, pp. 443-449, 1979.
[4] Bell, J.H., and Mehta, R.D., " Contraction Design for Small Law-Speed Wind Tunnels", National Aeronautics and space, CA 94305, 1988.
[5] Rae, W. H., and Pope, A., "Low-speed wind tunnel testing", 2nd edn. John Wiley and sons, 1984.
[6] Mansi, S., Neha, S., and Sunil, K. Y., "Review of Design and Construction of an Open Circuit Low Speed Wind Tunnel", Global J. of Researches in Eing. (A), V. XIII Issue V Version I, 2013.
[7] Björn L., and Arne V. J., "Design and Evaluation of a Low-Speed Wind-Tunnel with Expanding Corners", Technical Reports from Royal Institute of Technology, Department of Mechanics, SE-100 44 Stockholm, Sweden, 2002.
[8] Seidel, M., "Construction, design, manufacturing, and calibration of the German-Dutch wind tunnel (DNW)", Tech. Rep., Duits-Nederlandese Windtunnel (DNW), 1982.
[9] Goldstein, E.,"Wind Tunnels, Don't Count Them Out," Aerospace America, Vol. 48 4, pp. 38-43, 2010.
[10] Salam, C.A., and Ali, M.A., "Design and Fabrication of A Bench Mounted Closed Loop Wind Tunnel", MIST J. of Science and technology, Vol. 2, No. 1, 2010.
[11] Wagner, S., Bareiß, R. and Guidati, G, "Wind Turbine Noise", Springer-Verlag, Berlin, pp. 14-21, 1996.
Cite This Article
  • APA Style

    Yassen El-Sayed Yassen, Ahmed Sharaf Abdelhamed. (2014). Design of Mini Wind Tunnel Based on Coanda Effect. American Journal of Aerospace Engineering, 2(1-1), 31-37. https://doi.org/10.11648/j.ajae.s.2015020101.13

    Copy | Download

    ACS Style

    Yassen El-Sayed Yassen; Ahmed Sharaf Abdelhamed. Design of Mini Wind Tunnel Based on Coanda Effect. Am. J. Aerosp. Eng. 2014, 2(1-1), 31-37. doi: 10.11648/j.ajae.s.2015020101.13

    Copy | Download

    AMA Style

    Yassen El-Sayed Yassen, Ahmed Sharaf Abdelhamed. Design of Mini Wind Tunnel Based on Coanda Effect. Am J Aerosp Eng. 2014;2(1-1):31-37. doi: 10.11648/j.ajae.s.2015020101.13

    Copy | Download

  • @article{10.11648/j.ajae.s.2015020101.13,
      author = {Yassen El-Sayed Yassen and Ahmed Sharaf Abdelhamed},
      title = {Design of Mini Wind Tunnel Based on Coanda Effect},
      journal = {American Journal of Aerospace Engineering},
      volume = {2},
      number = {1-1},
      pages = {31-37},
      doi = {10.11648/j.ajae.s.2015020101.13},
      url = {https://doi.org/10.11648/j.ajae.s.2015020101.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajae.s.2015020101.13},
      abstract = {An experimental investigation and CFD treatment were employed to design mini-wind tunnel based on Coanda effect for model tests and basic research. The inlet source flow is efficiently creating smooth steady airflow with acceptable noise, achieving the possibility of placing the test target closer to the source of flow with reasonable estimates of turbulence intensity. The design aims at achieving flow uniformity in the working section midplane, preventing separation in the contraction and minimizing the boundary–layer thickness. Intensive measurements after construction demonstrate the significance of the design process and validate the CFD predictions. The results are represented in graphic form to indicate the aspects of the contraction ratio. The numerical and experimental results show the uniformity of velocity distribution inside the working section. Tracing of separation and backflow is crucial allowing a variety of realistic demonstrations to be performed. The numerical solution provides a powerful tool to demonstrate the rate of boundary–layer growth inside the working section and validate against the empirical correlations with insignificant wall–friction drag. Assessment study to address large–scale wind tunnel based on coanda effect would be considered.},
     year = {2014}
    }
    

    Copy | Download

  • TY  - JOUR
    T1  - Design of Mini Wind Tunnel Based on Coanda Effect
    AU  - Yassen El-Sayed Yassen
    AU  - Ahmed Sharaf Abdelhamed
    Y1  - 2014/10/07
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ajae.s.2015020101.13
    DO  - 10.11648/j.ajae.s.2015020101.13
    T2  - American Journal of Aerospace Engineering
    JF  - American Journal of Aerospace Engineering
    JO  - American Journal of Aerospace Engineering
    SP  - 31
    EP  - 37
    PB  - Science Publishing Group
    SN  - 2376-4821
    UR  - https://doi.org/10.11648/j.ajae.s.2015020101.13
    AB  - An experimental investigation and CFD treatment were employed to design mini-wind tunnel based on Coanda effect for model tests and basic research. The inlet source flow is efficiently creating smooth steady airflow with acceptable noise, achieving the possibility of placing the test target closer to the source of flow with reasonable estimates of turbulence intensity. The design aims at achieving flow uniformity in the working section midplane, preventing separation in the contraction and minimizing the boundary–layer thickness. Intensive measurements after construction demonstrate the significance of the design process and validate the CFD predictions. The results are represented in graphic form to indicate the aspects of the contraction ratio. The numerical and experimental results show the uniformity of velocity distribution inside the working section. Tracing of separation and backflow is crucial allowing a variety of realistic demonstrations to be performed. The numerical solution provides a powerful tool to demonstrate the rate of boundary–layer growth inside the working section and validate against the empirical correlations with insignificant wall–friction drag. Assessment study to address large–scale wind tunnel based on coanda effect would be considered.
    VL  - 2
    IS  - 1-1
    ER  - 

    Copy | Download

Author Information
  • Mechanical Power Engineering , Faculty of Engineering, Port Said University, Port Said, Egypt

  • Mechanical Power Engineering , Faculty of Engineering, Port Said University, Port Said, Egypt

  • Sections