Application of RP Technology with Polycarbonate Material for Wind Tunnel Model Fabrication

Traditionally, wind tunnel models are made of metal and are very expensive. In these years, everyone is looking for ways to do more with less. Under the right test conditions, a rapid prototype part could be tested in a wind tunnel. Using rapid prototype manufacturing techniques and materials in this way significantly reduces time and cost of production of wind tunnel models. This study was done of fused deposition modeling (FDM) and their ability to make components for wind tunnel models in a timely and cost effective manner. This paper discusses the application of wind tunnel model configuration constructed using FDM for transonic wind tunnel testing. A study was undertaken comparing a rapid prototyping model constructed of FDM Technologies using polycarbonate to that of a standard machined steel model. Testing covered the Mach range of Mach 0.3 to Mach 0.75 at an angle-ofattack range of - 2° to +12°. Results from this study show relatively good agreement between the two models and rapid prototyping Method reduces time and cost of production of wind tunnel models. It can be concluded from this study that wind tunnel models constructed using rapid prototyping method and materials can be used in wind tunnel testing for initial baseline aerodynamic database development.

Authors:

• A. Ahmadi Nadooshan
• S. Daneshmand
• C. Aghanajafi

Keywords:

• Polycarbonate
• Fabrication
• FDM
• Model
• RapidPrototyping
• Wind Tunnel.

References:

[1] Song,Y, Yan,Y, Zhang, R,Xu, R. and Wang, F, "rapid prototyping and
rapid tooling technology", Journal of Materials Processing Technology,
Vol. 120, no. 3, pp.237-42, 2002.
[2] Bohn, Jan H., "Integrating Rapid Prototyping into the Engineering
Curriculum - A Case Study," Rapid Prototyping Journal, Vol. 3, No.1,
pp. 32-37, 1997.
[3] De Leon, John E, and Gary Winek , "Incorporating Rapid Prototyping
Into the Engineering Design Curriculum," Engineering Design Graphics
Journal, Vol. 64, No. 1, pp. 18-23, 2000.
[4] Bocking, C, Jacobson, D.M., Sangha, S.P.S., Dickens, P.M., and Soar,
R, "The Production of Large Rapid Prototype Tools Using Layer
Manufacturing Technology", Journal of Technology, Vol. 14, No. 2, pp.
110-14, 1997.
[5] Cho, I., Lee, K., Choi, W., Song, Y. "Development of a new type rapid
prototyping system", International Journal of Machine Tools &
Manufacture, vol. 40, no. 4, pp.1813-29, 2000.
[6] Thrimurthullu, K., Pandey, P.M., Reddy, N.V. "Part Deposition
Orientation in Fused Deposition Modeling", International Journal of
Machine Tools and Manufacture, vol. 44, pp. 585-594, 2004.
[7] Steve Upcraft, Richard Fletcher, "The rapid prototyping technologies,"
Journal of Assembly Automation, vol. 23, no. 4, pp. 318-3308, 2003.
[8] http://www.matweb.com
[9] Jones, Pandey, R.T., "The Oblique Wing craft design for Transonic and
Low Supersonic Speeds," Acta Astronautic, Vol. 4, per gammon Press,
1999.
[10] A. Springer, "Evaluating Aerodynamic Characteristics of Wind-Tunnel
Models Produced by Rapid Prototyping Methods," Journal of Spacecraft
and Rockets, vol. 35, no. 6, pp. 755-759, 1998.
[11] Springer, A.; Cooper, K.; and Roberts, F. "Application of Rapid
Prototyping Models to Transonic Wind tunnel Testing. AIAA 97-0988,
35th Aerospace Sciences Meeting. January 1997.
[12] Springer A, Cooper K, "Comparing the Aerodynamic Characteristics of
Wind Tunnel Models Produced by Rapid Prototyping and Conventional
Methods,"AIAA 97-2222, 15th AIAA Applied Aerodynamics
Conference, June 1997.