Method for determining polar curve of propeller-driven aircraft

The invention provides a propeller-driven aircraft polar curve determination method, which is designed to introduce a tension coefficient item into a common propeller-driven aircraft polar curve model, characterize the influence of propeller slip flow on a resistance coefficient, and establish a universal polar curve model which can be simultaneously suitable for cruising, climbing and descending states of a propeller-driven aircraft. Further, an expression of the general polar curve model is determined by utilizing cruise and climbing/descending test flight data of the propeller-driven aircraft, and the method can be simultaneously suitable for flight performance extension calculation of the propeller-driven aircraft in different flight states with the same configuration, so that the efficiency and the accuracy of propeller flight performance calculation can be improved; and effective guidance can be provided for design and improved rapid iteration of the propeller-driven aircraft. 本申请提供一种螺旋桨飞机极曲线确定方法，设计在一般螺