In order to overcome the difficulties with machining the internal channels of a wind tunnel aircraft model for pressure measurements, this paper proposes the use of stereolithography to realize the integrated forming of aerodynamic configurations and internal channels. A series of micro-channels with different diameters and lengths are fabricated, and their forming qualities are examined with an optical microscope system. The diameters of cross-sections are also measured to conform with the radius compensation principle concerning the parameters such as diameter, length and prototyping direction. Air tightness and air permeability of the micro-channels is verified by means of a special test device. Therefore, the channels based on stereolithography meet the requirements of wind tunnel test and they are able to replace the metal tubes.
ZHANG Wei, LI Dichen, ZHAO Xinglei, ZHU Weijun, WANG Wei, LIU Jun
. Fabrication and Performance Evaluation of Micro-channels in Aircraft Wind-tunnel-models for Pressure Measurements Using Stereolithography[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(12)
: 2335
-2340
.
DOI: CNKI:11-1929/V.20110620.1341.003
[1] Springer A, Cooper K. Comparing the aerodynamic characteristics of wind tunnel models produced by rapid prototyping and conventional methods. AIAA-1997-2222, 1997.
[2] Buck G M. Rapid model fabrication and testing for aerospace vehicles. AIAA-2000-0826, 2000.
[3] Aghanajafi S, Adelnia R, Daneshmand S. Production of wind tunnel testing models with use of rapid prototyping methods[J]. WSEAS Transactions on Circuits and Systems, 2006, 5(4): 555-561.
[4] Wohlers T. Rapid prototyping and manufacturing state of the industry. Annual Worldwide Progress Report, Wohlers Associate, Fort Collins, Co., 2006.
[5] Chuk R N, Thomson V J. A comparison of rapid prototyping techniques used for wind tunnel model fabrication[J]. Rapid Prototyping Journal, 1998, 4(4): 185-196.
[6] Azarov Y A, Vermel V D, Kornushenko A V, et al. Experience in laser stereolithography and its application in manufacturing wind-tunnel aerodynamic models of various purposes//Proceedings of the Seventh International Conference on Laser and Laser-Information Technologies. 2002, 4644: 433-440.
[7] Hague R, Mansour S, Saleh N. Material and design considerations for rapid manufacturing[J]. International Journal of Production Research, 2004, 42(22): 4691-4708.
[8] Damljanovic D, Vitic A, Vukovic D. Testing of AGARD-B calibration model in the T-38 transonic windtunnel[J]. Scientific-Technical Review, 2006, 4(2): 52-62.
[9] Quincieu J, Robinson C, Stucker B, et al. Case study: selective laser sintering of the USUSat II small satellite structure[J]. Assembly Automation, 2005, 25(4): 267-272.
[10] 李平, 谢艳, 杨奇磷. 2.4 m风洞大规模测压试验技术及应用[J]. 流体力学实验与测量, 2002, 16(2): 92-96. Li Ping, Xie Yan, Yang Qilin. Test technique and application of large-scale pressure measurement in the 2.4 m×2.4 m transonic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2002, 16(2): 92-96. (in Chinese)
[11] 恽起麟. 风洞实验[M]. 北京: 国防工业出版社, 2000. Hui Qilin. Wind tunnel testing[M]. Beijing: National Defense Industry Press, 2000. (in Chinese)
[12] Richard R H, Cliford L R. Rapid prototype wind tunnel model and method of making same: US, 6796171B2 . 2004-09-28.
[13] Hildebrand R J, Eidson R C, Tyler C. Development of a low cost, rapid prototype, lambda wing-body wind-tunnel model. AIAA-2003-3818, 2003.
[14] Tyler C, Braisted W, Higgins J. Evaluation of rapid prototyping technologies for use in wind-tunnel model fabrication. AIAA-2004-6870, 2004.
[15] Heyes A L, Smith D A R. Rapid techniques for wind-tunnel model manufacture. Journal of Aircraft, 2004, 41(2): 413-415.
[16] Zhou Z H, Li D C, Zhang Z Y, et al. Design and fabrication of a hybrid surface-pressure airfoil model based on rapid prototyping [J]. Rapid Prototyping Journal, 2008, 14(1): 57-66.
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