民用客机后机身外形设计研究

CC-200是一款单通道、中程大型民用客机。CC-200民用客机具有大展弦比、小后掠角、相对较低的巡航速度等技术特点。CC-200的后机身的外形长度为6.458 m,上掠角为12°,与地面水平线的最小间隙值为0.15 m。后机身外形及其它部段的外形采用CATIA V5软件建立了三维数模,后机身采用ESDU 80006和ESDU7011中的方法进行阻力增量的计算、评估。计算表明,在机身迎角一定的情况下,后机身阻力增量随着上掠角的增大而增大。

Study of Aft Fuselage External Shape Design of Civil Airplane

CC-200 is a civil airplane with single-aisle and mid-range. The technical characteristics of CC-200 are bigger wing aspect ratio, smaller swept angle and lower cruising speed, etc. The Aft fuselage length of CC-200 is 6 458 m with upsweep angle 12° and tail down clearance 0.15 m. The external shape of aft fuselage and other sections was built by using CATIA V5 software. Furthermore, the drag increment of aft fuselage was calculated by using the methods in ESDU 80006 and ESDU 7011. The results show that the drag increment of aft fuselage grows up with the upswept angle under certain constant incidence angle.