锥导乘波体构型的气动特性不确定度分析

doi:10.7527/S1000-6893.2017.121519

Abstract

Abstract: To study the variation of aerodynamic performances of a cone-derived waverider under the off-design condition, a sparse non-intrusive polynomial chaos method along with nonlinear global sensitivity analysis are used to achieve the uncertainty quantification of aerodynamic characteristics of the waverider. A parametric model of the cone-derived waverider is constructed by the secondary development of CATIA software. Under the condition when the flow velocity, temperature, density as well as the angle of attack can satisfy the specific disturbances, the sample data are generated by experimental design of Latin Hypercube sampling and calculated by the CFD method. The uncertainty of the aerodynamic coefficients of the waverider is obtained by non-intrusive polynomial chaos analysis based on the response surface established by the preceding sample data. The sensitivity analysis results show that the angle of attack plays a leading role in the variation of aerodynamic characteristics of the cone-derived waverider. The uncertainty analysis of the flow field of Mach number and pressure indicates that the main reason for the the variation of aerodynamic characteristics is pressure leakage at the leading edge of the waverider, which affects the distribution of the upper surface pressure and leads to deterioration of aerodynamic performances.

Key words: hypersonic, aerodynamic characteristics, waverider, uncertainty analysis, non-intrusive polynomial chaos

CLC Number:

V211.3

SONG Fuqiang, YAN Chao, MA Baofeng, JU Shengjun. Uncertainty analysis of aerodynamic characteristics for cone-derived waverider configuration[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(2): 121519-121519.

References

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Uncertainty analysis of aerodynamic characteristics for cone-derived waverider configuration

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