Experimental Investigations of the NASA Common Research Model (Invited)
Experimental Investigations of the NASA Common Research Model (Invited)
复制标题
NASA共同研究模型的实验研究（特邀）
DOI：
10.2514/6.2010-4218
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Ashley Dittberner
中科院分区：
文献类型：
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作者：
Melissa Rivers;Ashley Dittberner
An experimental aerodynamic investigation of the NASA Common Research Model has been conducted in the NASA NTF (National Transonic Facility). Data have been obtained at chord Reynolds numbers of 5, 19.8 and 30 million for the WB and WBT0 configurations. Data have also been obtained at a chord Reynolds number of 5 million for the WBNP, WBT+2 and WBT-2 configurations. Force and moment, surface pressure and surface flow visualization data were obtained but only the force and moment data are presented herein. Model deformation measurements, aeroelastic, nacelle/pylon, Reynolds number and tail effects have been assessed. The model deformation measurements showed more twist as you go out the wing span, with a break in the high q∞ data close to CL = 0.6 which is consistent with separation near the tip. Increases in dynamic pressure give an increase in pitching moment and drag and a decrease in lift for the WB and WBT0 configuration at Mach = 0.7, 0.85 and 0.87. The addition of a nacelle/pylon gave an increase in drag, decrease in lift and a less nose down pitching moment around the design lift condition of 0.5. Increases in chord Reynolds number have been found to follow the normal Reynolds number trends except at the 19.8 million low q∞ cases. The abnormality of the 19.8 million low q∞ cases is still under investigation. The tail effects also follow the expected trends. Finally, all of the data shown fall within the 2-sigma limits for repeatability.
