Numerical simulation study on aeroelastic stability mechanism of a transonic fan rotor

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-04-09 DOI:10.1016/j.ast.2025.110193

Yongbo Yu , Yanrong Wang , Le Han

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Abstract

This study investigates the aeroelastic stability of fan rotor blades via the energy method. Research has identified shock waves, backflow, and radial flow as important factors causing aeroelastic instability in rotor blades. The variation in the aerodynamic damping of the rotor blade with the interblade phase angle is consistent with that on the suction surface. The larger the unsteady pressure amplitude is, the more difficult it is for the interblade phase angle to affect the phase of the unsteady pressure in the corresponding area. At a constant rotational speed, the radial flow on the suction surface gradually intensifies as the flow rate decreases. This strong radial flow causes aeroelastic instability near the stall point by altering the phase of the unsteady aerodynamic forces on the rotor blade surface. The aeroelastic instability boundary at different speeds is near the stall point. Regions with large unsteady aerodynamic pressure amplitudes on the rotor blade surface are located mainly near the leading edge of the suction surface, shock waves, and backflow areas. The phase of unsteady pressure in these regions undergoes a 180-degree shift due to the influence of shock waves and strong radial flow.

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跨音速风机转子气动弹性稳定机理的数值模拟研究

采用能量法研究了风机动叶的气动弹性稳定性。研究发现激波、回流和径向流动是引起动叶气动弹性失稳的重要因素。动叶气动阻尼随叶间相位角的变化规律与吸力面一致。非定常压力幅值越大，叶片间相位角对相应区域非定常压力相位的影响越大。在一定转速下，吸力面上的径向流动随着流量的减小而逐渐增强。这种强烈的径向流通过改变转子叶片表面非定常气动力的相位而引起失速点附近的气动弹性不稳定性。不同速度下的气动弹性失稳边界在失速点附近。动叶表面非定常气动压力幅值较大的区域主要位于吸力面前缘、激波区和回流区附近。由于激波和强径向流的影响，这些区域的非定常压力相位发生了180度的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.