Research on Calculation Method of Airship's Longitudinal Dynamic Derivative
高攀 GAO Pan
（中国特种飞行器研究所，荆门 448035）
（China Institute of Special Aircraft，Jingmen 448035，China）
摘要：现有飞行器动导数工程估算方法并不适用于飞艇，为了解决这一问题，采用非定常俯仰振荡法和准定常旋转流场法推导出了纵向组合动导数和单独动导数计算公式，建立了基于非定常CFD方法的飞艇纵向动导数计算方法。对国际动导数标模Finner导弹进行CFD动导数计算，计算结果与风洞试验结果进行了对比，并对飞艇开展了纵向动导数计算。结果表明：Finner导弹动导数计算结果与风洞试验结果误差在5%以内，验证了动导数计算方法的准确性；采用俯仰振荡法和旋转流场法可以得到飞艇纵向全部动导数，为飞艇动导数计算提供一种新的思路，具有较高的工程应用价值。
Abstract: The existing engineering estimation methods for the dynamic derivatives of aircraft are not suitable for airships. In order to solve this problem, the unsteady pitch oscillation method and the quasi-steady rotating flow field method are used to derive the calculation formulas of the longitudinal combined dynamic derivatives and the independent dynamic derivatives. A calculation method of the longitudinal dynamic derivative of the airship based on the unsteady CFD method is presented. The CFD dynamic derivative calculation was carried out on the international dynamic derivative scalar model Finner missile, the calculation results were compared with the wind tunnel test results, and the longitudinal dynamic derivative calculation was carried out for the airship. The results show that the error between the Finner missile dynamic derivative calculation results and the wind tunnel test results is within 5%, which verifies the accuracy of the dynamic derivative calculation method. Derivative calculation provides a new idea and has high engineering application value.
关键词：CFD；俯仰振荡法；旋转流场法；导数
Key words: CFD；pitch oscillation method；rotating flow field method；derivative
中图分类号：V211 文献标识码：A 文章编号：1006-4311（2022）20-149-03
DOI:10.3969/j.issn.1006-4311.2022.20.048.
文章出处：高攀. 飞艇纵向动导数计算方法研究[J]. 价值工程,2022,41(20):149-151.
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