A program for the predictions of civil jet lift and drag characteristics is developed to satisfy the demand of civil jet conceptual design. The estimation methods of lift and drag characteristics are presented. The program is written in MATLAB with a user interface. Precision of this aerodynamic analysis model is verified with the typical civil jet. The aerodynamic characteristics can be quickly predicted by use of the program. After designers input the airplane's geometric parameters and the flight conditions through the user interface,one can quickly obtain the aerodynamic characteristics,such as drag polar curves,lift to drag curves,cruise efficiency curves,the buffet onset boundary curve at cruise conditions,the lift curves and lift to drag curves at low speed.%针对喷气客机概念设计需求,在确定了升阻特性的估算方法后,应用MATLAB开发气动特性分析程序.以典型喷气客机为例,验证了气动分析模型和计算程序的精度.所开发气动特性估算程序能快速对喷气客机初步方案气动特性进行评估.设计人员只需通过用户界面给出飞机外形参数和飞行条件,就可快速获得巡航构型曲线、升阻比曲线、巡航效率曲线、抖振边界曲线,以及起降构型升力线和升阻比曲线.
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