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中文摘要：
风扇转子工作在高压比、高转速、高负荷的级环境中，实际流动中存在风扇的长叶片与流体间强烈的耦合作用。针对风扇实际工作中存在的流固耦合问题，本文通过基于时域推进的双向流固耦合方法对风扇转子的流固耦合问题进行求解，并在此基础上对该转子的超声速非失速颤振现象进行研究。分析结果表明，考虑耦合效应的转子特性线整体向大流量方向偏移O．7％，效率降低约0．76％，总压比基本保持不变，稳定工作裕度略有减小；转子在设计转速下近效率最大点处，可能会发生基于叶片一阶固有模态振动的超声速非失速颤振现象。
英文摘要：
There is strong coupling between the long fan blades and the fluid in actual flow field, because the fan rotor works in the high pressure ratio, high rotation speed and high load level environment. In this paper, the fluid-structure interaction（FSI） problem of the fan rotor is solved by two-way fluid-structure interaction method based on the time marching, and the supersonic unstalled flutter phenomenon of the fan rotor is studied. The numerical results show that the fan rotor characteristic line shift 0.7% towards the large flow direction, the efficiency is reduced 0.76%, the total pressure ratio remains the same and the stable operation margin decreases slightly when the coupling influence is considered. The supersonic unstalled flutter based on the first-order natural mode vibration of the blade may occur near the maximum efficiency Point at the design sDeed of the fan rotor.
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