LUO Jinling, LONG Shuangli, TANG Jibin, et al. Requirement analyses and optimized design of wing/airfoil for aerospace vehicles[J]. 2021, 39(6): 101-110.
LUO Jinling, LONG Shuangli, TANG Jibin, et al. Requirement analyses and optimized design of wing/airfoil for aerospace vehicles[J]. 2021, 39(6): 101-110.DOI: 10.7638/kqdlxxb-2021.0237.
Requirement analyses and optimized design of wing/airfoil for aerospace vehicles
Aerospace vehicles have a wide velocity range that spans subsonic to hypersonic speeds. In such a wide speed range
their aerodynamic characteristics vary so significantly that traditional airfoils are improbable to satisfy the aerodynamic requirements for low- and high-speed flights at the same time. This paper proposes the requirements of airfoils and wings for aerospace vehicles
with especial attention being paid on the high lift at low speeds
high lift-to-drag ratio at high speeds
lift and gravity matching design
as well as structure and thermal protection design. In addition
an integrated design of airfoil and wing plane shape is carried out by numerical simulations based on a wide-speed-range airfoil. A new wing with spanwise-varying airfoils is obtained. Compared with the original wing
the lift efficiency of this new wing at low speed is increased by 36.3%. The lift-to-drag ratios at the lift-weight-balance point is increased by 33.4% and 12.9% respectively for supersonic and hypersonic flights. Since the new wing has good aerodynamic characteristics in the whole velocity range
it is further applied to a typical aerospace vehicle by an integrated optimization. The lift-to-drag ratio at the lift-weight-balance point is further improved by 5% at high subsonic speed
10.3% at supersonic speed
and 0.7% at hypersonic speed. The contradiction between high lift at low speed and high lift-to-drag ratio at high speed is alleviated. An aerospace vehicle layout that meets the overall design requirements for wide-speed-range flight is obtained. The results have certain engineering guiding significance.
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