Supersonic Flutter Analysis Based on a Local Piston Theory
Supersonic Flutter Analysis Based on a Local Piston Theory
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基于局部活塞理论的超音速颤振分析
DOI:
10.2514/1.37750
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发表时间:
2009-10
期刊:
影响因子:
2.5
通讯作者:
Ye, Zheng-Yin
中科院分区:
文献类型:
--
作者:
Zhang, Wei-Wei;Zhang, Chen-An;Liu, Feng;Ye, Zheng-Yin
DOI: 10.2514/1.37750 A highly efficient local-piston theory is presented for the prediction of inviscid unsteady pressure loads at supersonic and hypersonic speeds. A steady mean flow solution is first obtained by an Euler method. The classical pistontheoryismodifiedtoapplylocallyateachpointontheairfoilsurfaceontopofthelocalmean flowtoobtainthe unsteadypressureperturbationscausedbythedeviationoftheairfoilsurfacefromitsmeanlocationwithouttheneed of performing unsteady Euler computations. Results of two- and three-dimensional unsteady air loads and flutter predictions are compared with those obtained by the classical piston theory and an unsteady Euler method to assess theaccuracyandvalidityrangeinairfoilthickness, flightMachnumber,andangleofattackandwiththepresenceof blunt leading edges. The local-piston theory is found to offer superior accuracy and much wider validity range compared with the classical piston theory, with the cost of only a fraction of the computational time needed by an unsteady Euler method.
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DOI:
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发表时间:
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影响因子:
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影响因子:
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DOI:
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发表时间:
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期刊:
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