B757-200飞机重心位置变化对阻力影响机理分析及计算

Analysis and Calculation of the B757-200 Aircraft Gravity Center Position Change's Impact on Resistance Influence Mechanism

为探究B757-200飞机重心位置变化对阻力影响机理分析及计算,通过对飞机相关参数的介绍,通过定量将复杂的计算公式化简成为与气压高度、马赫数相关的公式,在同一极曲线中,算出升力系数的值,利用插值法,对6%-30%间的几个不同重心进行计算,得出重心变化对阻力的影响,得出的结果表明,随着重心的后移,飞机所受的阻力减小。

This thesis aims to study the analysis and calculation of B757-200 aircraft center of gravity position change’s infuencing the resistance mechanism. To begin with the introduction of the parameters related to the aircraft, it, based on quantitative analysis, simplifes the formula of pressure altitude and Mach number from complex formula, calculates the lift force coeffcient values in the same electrode curve; calculates several different centers of gravity between 6% and 30% and concludes the impact of center of gravity changes on resistance by using the interpolation method. The results show that, with the backward shift of the center of gravity, the resistance of the aircraft is reduced.