基于CFD方法的前支杆试飞测量装置误差分析

准确可靠的大气数据信息对飞行器的安全至关重要.处于研制阶段的大气数据系统往往存在一定程度的误差,需要在试飞阶段予以校准.试验机上加装的试飞测量装置要求尽可能地接近未受扰动的气流,同时减少对飞机已有大气数据系统的影响.采用计算流体力学方法,对某型民机进行数值模拟,确定了前支杆试飞测量装置的安装位置和长度,获得了前支杆的位...

Error Analysis on Noseboom Flight Test Instrument Based on CFD Method

Accurate and reliable atmospheric data information is very important to the safety of aircraft.The air data system in the development stage often has some errors,which needs to be calibrated in the flight test stage.The flight test measurement device installed on the test aircraft should be close to the undisturbed air flow as far as possible,and reduce the impact on the existing air data system of the aircraft.By using computational fluid dynamics (CFD) method,a civil aircraft is simulated.The installation position and length of the noseboom flight test measurement device are determined.The position error of the noseboom is obtained and the influence on the existing air data system of the aircraft is evaluated.The results show that when the length of the front strut is selected,the height error caused by the static pressure measurement error of the noseboom is larger,which also has a certain impact on the static pressure of the existing air data system,and has a small impact on the angle of attack.This result can be used as the basis for determining the airspeed calibration method of a certain type of civil aircraft,and also as a reference for other aircraft in the selection of airspeed calibration scheme.