关键词: 宽速域, 高压捕获翼, 气动构型, 计算流体力学, 跨声速

Abstract:

In recent decades， wide-speed-range aircraft with hypersonic cruise capability have garnered significant attention and emerged as a prominent research focus worldwide. However， a wider flight velocity range poses significant challenges to aerodynamic configuration design. To effectively overcome the trade-off between lift-to-drag ratio and volumetric efficiency， we propose a novel aerodynamic configuration with high volumetric capacity based on the high-pressure capturing wing concept. Numerical simulations demonstrate that this configuration achieves a maximum lift-to-drag ratio of 5.89 at Mach number 6.0， representing an improvement of over 18% compared to a reference configuration without the high-pressure capturing wing. Furthermore， numerical simulations and analyses were conducted focusing on two typical transonic conditions at Mach number 0.8 and 1.2. The results demonstrate that compared to the reference configuration， the new high-pressure capturing wing configuration exhibits increased lift and drag coefficients to varying degrees under both transonic conditions. Although this comes with some degradation in lift-to-drag ratio， the shift of the aerodynamic center is significantly reduced across the wide speed range. Specifically， the relative shift of the aerodynamic center is reduced by 11.1% in the transonic regime and by 49.9% across the transonic-to-hypersonic regime. Further analysis reveals that this reduction in aerodynamic center shift is primarily attributed to the coupling effects between the additional wing surface and the fuselage.

Key words: wide speed range, high-pressure capturing wing, aerodynamic configurations, computational fluid dynamics, transonic speed