文章摘要
刘战合, 乔良直, 罗明强, 王菁, 田博韬.一种连翼式双机身无人机气动特性[J].空军工程大学学报:自然科学版,2021,22(1):28-32
一种连翼式双机身无人机气动特性
Aerodynamic Characteristics Research of a Joined Wing UAV with Twin Fuselage
  
DOI:
中文关键词: 无人机  连翼  双机身  升阻比  气动特性
英文关键词: joined wing  twin fuselage  lift to drag ratio  aerodynamic characteristics  UAV
基金项目:河南省科技攻关计划(202102210267,212102210052)
作者单位
刘战合, 乔良直, 罗明强, 王菁, 田博韬 1.郑州航空工业管理学院航空工程学院 郑州 450046 2.郑州航空工业管理学院无人机研究院郑州450046 3.北京航空航天大学航空科学与工程学院 北京 100191 
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中文摘要:
      为改善无人机承载质量性能,提出并设计了一种新型连翼式双机身气动布局,建立了基础布局和改进布局模型,基于FLUENT详细研究了两种布局的气动特性。仿真结果表明,连翼式双机身布局有较好的气动性能,巡航状态升阻比可达16以上;经过翼身融合、机头修形及前后翼连接处理等改进后,升阻性能有较大提高,迎角2°时,改进布局升力系数、升阻比分别提高了1.8%、9.1%,阻力系数降低了6.7%,且具有更好的失速性能;与基础布局相比,改进布局有效降低了迎角2°时机头位置、翼身连接处的压力分布,迎角12°时改进布局后翼未发生明显分离;初步试飞试验说明两种布局均具有较为优秀的飞行性能,有望在军民运输、救援、侦察等领域得到应用。
英文摘要:
      In order to improve the loading performance of UAV, a new type aerodynamic configuration of joined wing with twin fuselage is designed, and a basic and improved layout model is established. The aerodynamic characteristics of the two configurations are studied in detail by FLUENT. The simulation results show that the joined wing with twin fuselage layout is good in aerodynamic performance, its lift to drag ratio in cruise can reach more than 16. With the improvements such as blended wing body, nose modification and connection procession at front and rear wings, its lift drag performance greatly improves. When the angle of attack (AOA) is at 2°, the lift coefficient and lift to drag ratio of improved configuration increase by 1.8% and 9.1% respectivly, the drag coefficient is reduced by 6.7%, and the stall performance is higher. Besides, compared with the basic configuration, the pressure distribution in nose and wing body connection of improved configuration is effectively reduced with AOA of 2°, the significantly separation doesn’t occur at rear wing of improved configuration at the AOA of 12°. The preliminary flight test shows that both configurations possess excellent flight performance, and there is hope of an application in military and civilian transportation, rescue, reconnaissance and other fields.
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