Composite UHBR Fan for Forced Response and Flutter Investigations
Composite UHBR Fan for Forced Response and Flutter Investigations
复制标题
用于强制响应和颤振研究的复合 UHBR 风扇
DOI：
10.1115/gt2021-58941
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
N. Paletta
中科院分区：
文献类型：
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作者：
T. Eggers;J. Friedrichs;J. Goessling;J. Seume;N. Natale;J. Flüh;N. Paletta
在CA 3ViAR（复合材料风扇气动、气动弹性和气动声学验证台）项目中，设计并测试了一种复合材料低跨音速风扇。其目标是一种具有最先进的空气动力学性能和复合材料转子叶片的成比例超高涵道比（UHBR）风扇，其特点是气动弹性现象，例如在风洞内的某些工作点下由入口畸变和颤振引起的强迫响应。本文描述了从总体性能指标到三维数值模型的气动和气动弹性设计过程。本征频率和扭转-插入比的目标被指定为使得颤振在相对于工作线具有足够裕度的期望操作条件下发生。对不同材料和铺层方式的复合材料叶片进行了分析，以达到结构目标。风扇应作为一个开放的测试案例，以推进未来的研究，在广泛的操作条件下的空气动力学，气动弹性和气动声学性能的调查。本文提出了一个初步的风扇级设计。
In the CA3ViAR (Composite fan Aerodynamic, Aeroelastic, and Aeroacoustic Validation Rig) project, a composite low-transonic fan is designed and tested. The aim is a scaled ultra-high bypass ratio (UHBR) fan with state-of-the-art aerodynamic performance and composite rotor blades, which features aeroelastic phenomena, e.g. forced response by inlet distortions and flutter, under certain operating points within the wind tunnel. In this paper, the aerodynamic and aeroelastic design process starting from the overall performance specifications to a threedimensional numerical model is described. A target of eigen-frequency and twist-to-plunge ratio is specified such that flutter occurs at desired operating conditions with a sufficient margin with respect to the working line. Different materials and layups of the composite blade are analyzed to reach the structural target. The fan should serve as an open test case to advance the future research on aerodynamic, aeroelastic, and aeroacoustic performance investigations in a wide range of operating conditions. A preliminary fan stage design is presented in this paper.