机体/推进一体化飞行器动导数频域计算方法

运用Etkin非定常气动力模型，将谐波平衡法应用于复杂外形动导数辨识。计算结果表明：谐波平衡法和时域方法的动导数辨识结果一致，与实验值吻合，验证了程序的正确性和谐波平衡法的可靠性。采用谐波平衡法对类X-51高超声速机体/推进一体化飞行器WR-A进行动导数辨识，并与时域方法的计算结果比较，考察了该方法在复杂外形下数值模拟非定常流动和动导数辨识的能力。实验结果表明：对于WR-A这种复杂外形飞行器，谐波平衡法也能在保证精度的同时具有较高的计算效率。
With the help of the unsteady Etkin aerodynamic model, the harmonic balance method to calculate the dynamic derivatives of complicated configuration was applied. The dynamic derivatives solved by harmonic balance method agree well with the results of time domain method and experimental data, which verified the correctness of codes and the reliability of the harmonic balance method. The harmonic balance method was applied to compute the dynamic derivatives of X-51 hypersonic airframe/propulsion integrative vehicle namely WR-A. A comparison was made with the time domain method to verify the ability of the harmonic balance method for the numerical simulation of unsteady flows around the complicated model and the ability of the computing dynamic derivatives. Results show that even for the vehicle WR-A of the complex configuration, the harmonic balance method was computationally accurate and efficient.