The Research of the Base Drag Direct Measurement by Piezo-Electric Balance in Shock Tunnel
A new base drag measurement method has been introduced in this paper. In tradition, the base drag of the model was measured by integrated the base pressure, which was measured by the pressure transducer located on the bottom of the model. In this method, the base drag was measured with piezoelectric balance directly. The drag force was measured twice by fixing the model base segment to the model or the balance, the differences between these two measurements is considered as the base drag of the model. The wind tunnel test was carried out in 0.6m shock tunnel of CARDC, with a cone model and a high lift/drag ratio model separately. The cone model base drag was measured in the flow field of M∞=8.42,Re∞/L=9.67x106/m with the attack angle of 0°. The high lift/drag ratio model base drag was measured in two different flow fields, with M∞=8.48, Re∞/L=2.63xl07/m and M∞=5.79, Re∞/L=3.45xl07/m separately, and the attack angle is 0°, 8°. The results showed that, the base drag coefficient of the cone model is 0.0015. For the high lift/drag ratio model, the base drag coefficient is 0.006 and 0.031 with the attack angle of 0°and 8° in the A/6 flow field, and 0.002 and 0.009 for the MS flow field. That is to say, the base drag which cant be ignored in high precision tests can be measured by piezoelectric balance in shock tunnel. In the same attack angle, the base drag of high lift/drag ratio model decreases with the increasing of flow field Mach number.
shock tunnel piezoelectric balance aerodynamic force base drag measurement
Lv Zhi-guo Li Guo-jun Jiang Hua Zhao Rong-juan Wang Gang
School of Energy and Power Engineering, Xian Jiaotong University, Xian, Shanxi, P.R.China, 710049 School of Energy and Power Engineering, Xian Jiaotong University, Xian, Shanxi, P.R.China, 710049 Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang,
国际会议
The 8th Sino-Russia High-speed Flow Conference(第八届中俄高超声速流体力学研讨会)
上海
英文
369-373
2011-11-21（万方平台首次上网日期，不代表论文的发表时间）