Investigation of shock–acoustic-wave interaction in transonic flow
Investigation of shock–acoustic-wave interaction in transonic flow
复制标题
跨音速流中冲击声波相互作用的研究
DOI:
10.1007/s00348-017-2466-z
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发表时间:
2018
影响因子:
2.4
通讯作者:
W. Schröder
中科院分区:
文献类型:
--
作者:
A. Feldhusen-Hoffmann;V. Statnikov;M. Klaas;W. Schröder
The buffet flow field around supercritical airfoils is dominated by self-sustained shock wave oscillations on the suction side of the wing. Theories assume that this unsteadiness is driven by an acoustic feedback loop of disturbances in the flow field downstream of the shock wave whose upstream propagating part is generated by acoustic waves. Therefore, in this study, first variations in the sound pressure level of the airfoil’s trailing-edge noise during a buffet cycle, which force the shock wave to move upstream and downstream, are detected, and then, the sensitivity of the shock wave oscillation during buffet to external acoustic forcing is analyzed. Time-resolved standard and tomographic particle-image velocimetry (PIV) measurements are applied to investigate the transonic buffet flow field over a supercritical DRA 2303 airfoil. The freestream Mach number is, the angle of attack is, and the chord-based Reynolds number is. The perturbed Lamb vector field, which describes the major acoustic source term of trailing-edge noise, is determined from the tomographic PIV data. Subsequently, the buffet flow field is disturbed by an artificially generated acoustic field, the acoustic intensity of which is comparable to the Lamb vector that is determined from the PIV data. The results confirm the hypothesis that buffet is driven by an acoustic feedback loop and show the shock wave oscillation to directly respond to external acoustic forcing. That is, the amplitude modulation frequency of the artificial acoustic perturbation determines the shock oscillation.
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DOI:
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发表时间:
1990
期刊:
影响因子:
--
作者:
E. Stanewsky;D. Basler
通讯作者:
D. Basler
DOI:
--
发表时间:
2013
期刊:
影响因子:
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作者:
A. Feldhusen;A. Hartmann;M. Klaas;W. Schroeder
通讯作者:
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DOI:
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发表时间:
2008
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作者:
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通讯作者:
H. Olivier
DOI:
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发表时间:
1998
期刊:
影响因子:
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作者:
G. Behler;A. Bernhard
通讯作者:
A. Bernhard
影响因子:
2.5
作者:
F. Sartor;C. Mettot;D. Sipp
通讯作者:
F. Sartor;C. Mettot;D. Sipp