吸气流动控制对翼身融合飞机气动特性的影响  

Influence of suction flow control on aerodynamic characteristics of blended-wing-body aircraft

作　　者：贾媛 曹翔 吴江浩[1] JIA Yuan;CAO Xiang;WU Jianghao(School of Transportation Science and Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100083

出　　处：《北京航空航天大学学报》2022年第6期1065-1071,共7页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：以采用分布式动力的翼身融合飞机为研究对象,探究了吸气流动控制方式(吸气位置和吸气动量)对飞机起飞和巡航状态下气动特性的影响规律,解释了吸气流动控制影响翼身融合飞机气动特性的机理。研究结果表明:起飞大攻角状态下,采用外翼段吸气方案(吸气位置为0.05c,吸气动量为0.02),飞机最大升力系数与无吸气状态相比提升7.16%;巡航状态下,采用中心体段吸气方案(吸气位置为0.6c,吸气动量为0.0125),可改善动力系统的压力分布,飞机升阻比与无吸气状态相比最大提升2.14%。This paper studies a blended-wing-body aircraft with distributed propulsion,explores the influence of suction control(with suction position and suction momentum variables)on the aerodynamic characteristics of aircraft in take-off and cruise state and explains the mechanism of the influence of suction flow control on the aerodynamic characteristics of the blended-wing-body aircraft.The results show that under the condition of high take-off attack angle,compared with the non-aspirated state,the maximum lift coefficient of the aircraft is increased by 7.16%when the aspirator is located in the outer wing segment(chord position being 0.05c,and inspiratory momentum being 0.02).In the cruise state,when the aspirator is located in the centrosome(chord position being 0.6c,and inspiratory momentum being 0.0125),the pressure distribution of the powertrain is improved,and the lift-drag ratio of the aircraft is increased by 2.14%compared with that of the non-getter state.

关 键 词：翼身融合 流动控制 吸气位置 吸气动量 气动特性 

分 类 号：V221.3[航空宇航科学与技术—飞行器设计]