Research on measurement of airfoil drag for transonic wind tunnel experiment based on wake integral method
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摘要: 在风洞实验中采用尾迹积分法测量翼型阻力时，尾耙的形状、高度和安装位置均对翼型阻力存在一定的影响。在西北工业大学NF-6增压连续式跨声速翼型风洞中，针对同一翼型（OA309翼型），在不同马赫数下，进行了2种尾耙高度、2个尾耙安装位置的实验。对比分析了同一尾耙高度、不同安装位置以及同一安装位置、不同尾耙高度的阻力实验数据，获得了不同实验条件下适用于NF-6风洞阻力测量的尾耙高度及安装位置的组合，为跨声速翼型风洞阻力测量提供了参考。Abstract: The shape, the height and the installation location of the wake rake have some influence on the airfoil drag when the airfoil drag is measured by the wake integral method in the wind tunnel experiment. The airfoil experiments have been carried out in NF-6 transonic wind tunnel for two wake rakes with different heights respectively at two installation locations in the experimental section with the OA309 airfoil. By comparing and analyzing the experimental data of different installation locations with the same height of the wake rake and the experimental data of wake rakes with different heights at the same installation location, the suitable combination of the wake rake height and the installation location needed for different experimental conditions has been obtained, which provides references for drag measurement in the transonic airfoil wind tunnel.
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Key words:
- transonic wind tunnel /
- airfoil experiment /
- drag measurement /
- wake integral method /
- wake rake
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图 3 风洞中动量法测翼型阻力原理图
Figure 3. Principles for drag measurement with momentum method in wind tunnel
图 4 A尾耙在1、2位置处的阻力系数
Figure 4. Drag coefficient for wake rake A at installation position 1 and 2
图 5 A尾耙在1、2位置的动量损失曲线(Ma=0.50)
Figure 5. The momentum loss curve for wake rake A at installation position 1 and 2 (Ma=0.50)
图 6 A尾耙在1、2位置的动量损失曲线(Ma=0.80)
Figure 6. The momentum loss curve for wake rake A at installation position 1 and 2 (Ma=0.80)
图 7 A、B尾耙在2位置的阻力系数
Figure 7. Drag coefficients for wake rake A and B in installation position 2
图 8 A、B尾耙在2位置的动量损失曲线(Ma=0.50)
Figure 8. The momentum loss curve for wake rake A and B in installation position 2 (Ma=0.50)
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