【作者】 彭威； 李雪松； 任晓栋； 顾春伟； 吴宏；

【Author】 PENG Wei;LI Xuesong;REN Xiaodong;GU Chunwei;WU Hong;Tsinghua University, Gas Turbine Research Institute;China United Heavy Duty Gas Turbine Technology Co.LTD;

【机构】 清华大学燃气轮机研究所； 中国联合重型燃气轮机技术有限公司；

【摘要】 通过调整支板尾缘半径可能有利于抑制首级动叶受到的激励和振动。为了探究进气支板尾缘半径对压气机首级动叶的激励和振动的影响规律,本文以一个带进气支板的重型燃气轮机压气机为研究对象,进行了流场计算和振动计算。研究发现,随着尾缘半径的减小,支板尾缘附近的分离减弱,导致尾迹引起的总压亏损区更为狭长,进而使得低频成分中的总压幅值随着尾缘半径的减小而减小,使得首级动叶受到的激励力和振幅整体降低,但对激励力分布影响不大。研究结果为进气支板设计提供了参考,当支板尾缘没有严格要求时应避免尾缘半径过大,以保证首级动叶的安全。更多还原

【Abstract】 Adjusting the trailing edge radius of the intake struts may be advantageous in suppressing the excitation and vibration of first-stage rotor blades. To explore the impact of the intake struts trailing edge radius on the excitation and vibration of the first-stage rotor blades, this study focuses on a heavy-duty gas turbine compressor with intake struts, and fluid and vibration calculations were conducted. The study revealed that decreasing the trailing edge radius led to a reduction in separation near the vane’s trailing edge, resulting in a narrower wake and weakened mixing near the trailing edge. This caused the total pressure loss region induced by the wake to become more elongated in the low-frequency component, leading to a nonlinear decrease in total pressure amplitude with the reduction of the trailing edge radius. As the trailing edge radius decreased, the excitation force and vibration amplitude of the first-stage rotor blades decreased,while the excitation force distribution shows little variation. The research findings provide insights for the design of intake struts.更多还原