混合层流机翼气动设计与综合收益影响

Revealing the aerodynamic design principle and the law of comprehensive benefit change of supercritical wings under the action of Hybrid Laminar Flow Control (HLFC) is the key to the development of HLFC supercritical wing design. For a wing with a large aspect ratio and a medium sweep angle, the aerodynamic robust design of the HLFC wing is carried out for the typical design lift coefficients of traditional supercritical wings and Natural Laminar Flow (NLF) supercritical wings, based on the eN-based transition method coupled with the RANS solver. The design lift coefficients of CL=0.53 and CL=0.46 gain drag reduction of 10.06% and 9.6%, respectively. The HLFC wing has a larger applicable design lift coefficient than the NLF supercritical wing. With the decrease of the local Reynolds number, the suction control strength shows a decreasing trend along the span direction, and presents a "concave"-like distribution characteristic in the chord direction. The HLFC comprehensive benefits analysis for short-and medium-range passenger aircraft shows that reducing the weight penalty of the suction control system and increasing the cruise lift-to-drag ratio at a certain suction power cost can significantly improve the efficiency of the HLFC supercritical wing.