摘要
揭示混合层流控制(HLFC)作用下超临界机翼气动设计原理及综合收益变化规律,是开展HLFC超临界机翼设计的关键。针对具有中等后掠角的大展弦比机翼,借助耦合RANS求解器与eN的转捩预测方法,分别基于传统超临界机翼及自然层流(NLF)超临界机翼典型设计升力系数,开展HLFC机翼气动鲁棒设计。设计升力系数为0.53和0.46时分别获得10.06%和9.6%的减阻收益。HLFC机翼具有比NLF超临界机翼更大的适用设计升力系数。吸气控制强度沿展向方向随当地雷诺数的减小呈递减趋势,在弦向方向呈现类“凹”字形的分布特征。针对中短程客机的HLFC综合收益分析表明,降低吸气控制系统的重量惩罚,以一定吸气功率代价,提高巡航升阻比,可显著提高HLFC超临界机翼的效能。
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.
作者
姜丽红
饶寒月
兰夏毓
杨体浩
耿建中
白俊强
JIANG Lihong;RAO Hanyue;LAN Xiayu;YANG Tihao;GENG Jianzhong;BAI Junqiang(School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China;AVIC The First Aircraft Institute,Xi'an 710089,China;Unmanned System Research Institute,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2022年第11期303-322,共20页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(12002284,11902320)。
关键词
混合层流控制(HLFC)
超临界机翼
转捩预测
优化设计
减阻
Hybrid Laminar Flow Control(HLFC)
supercritical wing
transition prediction
optimal design
drag reduction
