马赫数离散方式对吻切锥变马赫数乘波飞行器构型和气动性能的影响

doi:10.7527/S1000-6893.2020.24074

Abstract

Abstract: To gain a deeper understanding of the design approach to the Osculating Cone Variable Mach number WaveRider (OCVMWR) and expand the practicality of the waverider in the field of reusable launch vehicles such as spaceplanes, we comparatively study the effects of Mach number discrete method on the shape and aerodynamic performance of the OCVMWR using the computational fluid dynamics approach. Proceeding from the three aspects of the (non-) linearity, monotonicity, and concavity of the function, this study selects the linear decreasing function, sine function, cosine function, 1-sine function and 1-cosine function as the discrete methods to discretize the given design Mach number range so as to ensure the representativeness of the research. The obtained results show different degrees of influence on the configuration and aerodynamic performance of the OCVMWR by different properties of the Mach number discrete method with the monotonicity having the predominant influence. Specifically, the configuration of the OCVMWR with monotonically increasing properties in the discrete method is longer and thicker than that with monotonically decreasing properties in the discrete method in the middle of the configuration, and narrower at the edge of the configuration. Moreover, the lift-to-drag ratio of the OCVMWR with monotonically increasing properties in the discrete method is lower.

Key words: waverider, osculating cone, wide-speed-range vehicles, variable Mach number, Mach number discrete method, aerodynamic performance

CLC Number:

V411

ZHAO Zhentao, HUANG Wei, JIN Hongsheng, WANG Hong, DONG Yuanping. Effects of Mach number discrete method on shape and aerodynamic performance of osculating cone variable Mach number waverider[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(12): 124074-124074.

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Effects of Mach number discrete method on shape and aerodynamic performance of osculating cone variable Mach number waverider

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