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高空螺旋在整个飞行的空气动力学性能建模方法
Miao Zhang1,2,3, Jun Jiao4, Jian Zhang4
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China. zhangmiao@iet.cn.
Scientific reports
|April 2, 2025
概括
本研究介绍了两种具有成本效益的方法,即全球替代模型 (GSM) 和分层插值替代模型 (SISM),用于建模高空螺旋空气动力学. 对于高空长续航 (HALE) 飞机来说,SISM提供了卓越的准确性,降低了数据成本.
科学领域:
- 航空航天工程 航空航天工程
- 计算流体动力学的流体动力学.
- 推进系统 推进系统
背景情况:
- 高空长续航 (HALE) 飞机的高空螺旋由于高度和风速的巨大变化而面临复杂的空气动力学条件.
- 精确的空气动力学建模对于HALE飞机的设计和控制至关重要,但需要昂贵的高保真度数据.
- 现有的建模方法可能无法充分捕捉高海拔地区的非线性空气动力学行为.
研究的目的:
- 提出和评估两种新的,具有成本效益的替代建模方法,用于获取高空螺旋的空气动力学数据.
- 为了比较全球代用模型 (GSM) 和分层互插代用模型 (SISM) 的预测准确度.
- 提供一种有效的方法来生成HALE飞机的基本空气动力学数据.
主要方法:
- 开发了两个替代模型技术:全球替代模型 (GSM) 和分层互叠替代模型 (SISM).
- 使用诸如平均相对误差 (MRE) 和最大相对误差 (MARE) 等指标评估模型性能.
- 使用相同数量的高保真性空气动力学样本对SISM和GSM进行比较分析.
主要成果:
- 高空螺旋空气动力学在高度变化方面表现出高度非线性趋势.
- 与全球代用模型 (GSM) 相比,分层互叠代用模型 (SISM) 显示出更高的预测准确性.
- 当使用同等数量的高保真性样本时,SISM在模型准确度上比GSM提高了2.16%.
结论:
- 与GSM相比,SISM提供了一个更准确,更具成本效益的解决方案来建模高空螺旋空气动力学.
- 提出的方法有助于获取重要的空气动力学数据,降低了HALE飞机设计和控制的成本.
- 这项研究为在先进的HALE飞机推进系统上工作的工程师提供了宝贵的工具.
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