The invention belongs to the field of unmanned aerial vehicle aerodynamics, and particularly relates to a method for predicting rotor wing and fuselage aerodynamic force of a tilt rotorcraft, which comprises the following steps: firstly, determining key parameter variables and variation ranges; then establishing a sampling space of a sample by using a Latin ultra-wideband method; on the sample space, CFD numerical simulation is carried out, and a flow field on the sampling space is calculated and solved; establishing a flow field reduced-order model through a POD (Particle Oriented Decomposition) method; key parameters are converted, and the downward load of the fuselage and the rotor pulling force are solved. According to the intrinsic orthogonal decomposition method, a reduced-order model only containing key features can be extracted from high-order complex flow, the calculation amount generated in the design process is greatly reduced, and the calculation efficiency under parameter change can be greatly improved.
本发明属于无人飞行器气动力学领域,具体说是一种预测倾转旋翼机的旋翼及机身气动力的方法,包括以下步骤:首先需要确定关键参数变量及变化范围;然后运用拉丁超立方法,建立样本的采样空间;在上述样本空间上,进行CFD数值仿真,计算求解采样空间上的流场;通过POD本征正交分解法,建立流场降阶模型;变换关键参数,求解机身向下载荷及旋翼拉力。本发明中的本征正交分解法,可以从高阶的复杂流动中,提取出仅包含关键特征的降阶模型,大大降低了设计过程中所产生的计算量,并能极大的提高参数变化下的计算效率。
Method for predicting aerodynamic force of rotors and fuselage of tilt rotorcraft
一种预测倾转旋翼机的旋翼及机身气动力的方法
2023-01-06
Patent
Electronic Resource
Chinese
IPC: | G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen |
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