Detached-eddy simulation of supersonic flow past a spike-tipped blunt nose
Detached-eddy simulation of supersonic flow past a spike-tipped blunt nose
复制标题
通过尖头钝头的超音速流的分离涡模拟
DOI:
10.1016/j.cja.2018.06.016
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发表时间:
2018-09
影响因子:
5.7
通讯作者:
Fu Song
中科院分区:
文献类型:
--
作者:
Xue Yuan;Wang Liang;Fu Song
Space vehicle in atmosphere travels mostly at supersonic speed and generates a very strong bow shockwave around its blunt nose. Oblique shock and conical separated flow zone generated by a forward disk-tip spike significantly reduce the drag by reducing the high pressure area on the blunt nose. This study employs improved delayed detached eddy simulation to investigate the characteristic flow structures around a spike-tipped blunt nose at Mach number of 3 and Reynolds number (based on the blunt-body diameter) of 2.72 × 108. The calculated time-averaged quantities agree well with experimental data. Characteristic frequencies in different flow regions are extracted using fast Fourier transform. It is found that two distinct instability modes exist: oscillation mode and pulsation mode. The former is related to the foreshock/turbulence interaction with non-dimensional frequency at around 0.004. The latter corresponds to the interaction between turbulence and shock structures around the blunt nose, with a typical coherent structure shedding frequency at 0.092.
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DOI:
10.1007/s10494-011-9336-1
发表时间:
2011-03
期刊:
Flow, Turbulence and Combustion
影响因子:
--
作者:
L. Wang;S. Fu
通讯作者:
L. Wang;S. Fu
影响因子:
9.6
作者:
S. Fu;Liang Wang
通讯作者:
S. Fu;Liang Wang
DOI:
10.1080/14786440708520987
发表时间:
1952-07
期刊:
Philosophical Magazine Series 1
影响因子:
--
作者:
W. A. Mair
通讯作者:
W. A. Mair
影响因子:
9.6
作者:
M. Ahmed;N. Qin
通讯作者:
M. Ahmed;N. Qin
影响因子:
3.7
作者:
A. Panaras;D. Drikakis
通讯作者:
A. Panaras;D. Drikakis