Experimental study of aerodynamic damping characteristics of a launch vehicle with boosters in transonic flow

JI Chen; WU Yansen; HOU Yingyu; ZHU Jian; LIU Wenbin; BAI Kui; LIU Ziqiang

doi:10.11729/syltlx20200034

Volume 34 Issue 6

Dec. 2020

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JI Chen, WU Yansen, HOU Yingyu, et al. Experimental study of aerodynamic damping characteristics of a launch vehicle with boosters in transonic flow[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(6): 24-31. doi: 10.11729/syltlx20200034

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Experimental study of aerodynamic damping characteristics of a launch vehicle with boosters in transonic flow

doi: 10.11729/syltlx20200034

1.
China Academy of Aerospace Aerodynamics, Beijing 100074, China
2.
Beijing Institute of Aerospace Systems Engineering, Beijing 100076, China

Received Date: 2020-03-16
Rev Recd Date: 2020-04-13
Publish Date: 2020-12-25

Abstract

Abstract

The aerodynamic-damping and frequency characteristics of a launch vehicle with boosters vibrating in the first free-free bending mode, and the influence of the reduced frequency on aerodynamic damping were experimentally studied in a transonic wind tunnel. The test Mach number ranged from 0.70 to 1.05, and the angle of attack ranged from 0° to 10°. The result shows that for the elastic model with boosters, the aerodynamic damping and modal frequency are affected by the angle of attack while the trend is not obvious. The aerodynamic damping changes with the Mach number. The transonic dip appears near the Mach number of 0.90. The modal frequency of the first mode decreases with the increase of the Mach number. The reduced frequency has some effect on the aerodynamic damping that when Mach number ranged from 0.70 to 0.90 and after 1.00, the aerodynamic damping decreases with the increase of the reduced frequency, while Mach number ranged from 0.92 to 0.98, the aerodynamic damping increases with the increase of the reduced frequency.
- aerodynamic damping,
- transonic,
- wind tunnel test,
- aeroelasticity,
- reduced frequency

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References(22)

References

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