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针对民航飞机巡航性能优化问题,提出一种相对准确的工程化计算方法并给出了详细的计算步骤。以B737-800为参考机型,飞机的简化运动方程为基础,利用飞机制造厂商提供的原始数据,编程计算飞机的燃油里程,进而求得MRC速度、LRC速度、最佳飞行高度以及给定初始巡航质量和巡航高度情况下的航程和航时。利用波音公司的INFLT软件对计算结果进行了检验,燃油里程的相对误差最大不超过2%,说明了该计算方法的正确性。
Aiming at the optimization of civil aircraft cruise performance, a relatively accurate engineering calculation method is proposed and detailed calculation steps are given. Based on the B737-800 as a reference model and the simplified equation of motion of the aircraft, the fuel mileage of the aircraft is programmed by using the raw data provided by the aircraft manufacturer to further calculate the MRC speed, the LRC speed, the optimal flight altitude, and the given initial Cruise quality and cruise altitude and voyage. The calculation results are tested by using the Boeing INFLT software. The relative error of the fuel mileage is no more than 2%, which shows the correctness of the calculation method.