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从流体动力学出发 ,应用动量定理研究汽轮机短直叶片由于间隙引起的非线性气流激振力问题 ,综合考虑了叶片的各项设计参数并应用理论分析的方法导出普遍适用的计算公式 ,解决了Alford公式中需人为选取效率系数的困难。为进行包含Alford力的转子非线性稳定性分析打下了基础
Based on the hydrodynamics, the momentum theorem is applied to study the nonlinear airflow excitation force caused by the gap in the turbine blades. Considering all the design parameters of the turbine blade and applying the theoretical analysis method, a universal formula is derived to solve the problem. The difficulty of choosing efficiency coefficient artificially in Alford formula. It laid the foundation for the nonlinear stability analysis of rotor with Alford force