基于机翼前缘绕流速度的大气参数测量方法

Estimation of Atmospheric Parameter Based on Airflow Velocity Over Wing Leading Edge

利用安装在机翼前缘的声矢量传感器,给出了一种新型大气参数的估计方法。基于声矢量传感器敏感翼部绕流分布,建立大气参数求解模型。根据机翼后掠、对称的特点,对速度矢量进行分解来对模型的非线性方程进行解耦,从而求解了侧滑角、攻角和自由流速度的表达式。通过Fluent对机翼绕流进行仿真,验证了方法的可行性。

A new method measuring the atmospheric parameters was proposed based on acoustic vector sensors located at the wing leading edge, and the atmospheric parameters model was set up based on the airflow velocity distribution sensed by acoustic vector sensor over wing leading edge. According to the symmetric, swept character of wings, velocity vector was decomposed to solve the non-linear equation of model. The expressions of angle of sideslip, angle of attack and free stream velocity were derived. The feasibility of the expressions was verified by wing simulation data from Fluent.