高压涡轮动叶叶尖掉块对气动性能及振动的影响
摘要：目的 高压涡轮损伤条件下运行状态对燃气轮机性能和振动会产生一定影响，而目前准确评估整机是否可以继续服役的手段较为缺乏，为此开展高压涡轮动叶叶尖凹槽磨损掉块对气动性能及振动变形的影响研究。 方法 采用三维数值仿真方法，以原动叶完整叶尖凹槽结构为基准，通过仿真分析了5种不同叶尖凹槽掉块形状对高压涡轮典型气动性能及动叶振动特性的影响规律。 结果 动叶叶尖凹槽叶盆侧掉块，叶背侧掉块，尾缘掉块，叶盆和尾缘同时掉块，叶盆、叶背和尾缘同时掉块，分别造成高压涡轮效率下降0.44%、1.6%、0.03%、0.67%、3.2%；不同动叶叶尖凹槽形状对动叶的振动变形影响较小，尾缘掉块会减小动叶的变形。 结论 综合气动性能及振动变形的影响分析，对于动叶叶尖凹槽的叶盆掉块、尾缘掉块或两者同时掉块的叶片可以继续使用，而对于叶背掉块及盆背侧和尾缘同时掉块的叶片建议不再使用。
Abstract:Objectives The operating state under the condition of high-pressure turbine damage will have a certain impact on the performance and vibration of the gas turbine. At present, the means to accurately assess whether the whole machine can continue to be in service was relatively lacking. Therefore, the research on the influence of the tip groove wear and block shedding of the high-pressure turbine rotor blade on the aerodynamic performance and vibration deformation had been carried out. Methods Using the three-dimensional numerical simulation method, based on the original tip groove structure of the blade, the influence of five different tip groove damage shapes on typical aerodynamic performance and vibration characteristics of the high pressure turbine was simulated and analyzed. Results The damage of the blade tip groove on the pressure side with falling block, suction side with falling block, trailing edge with falling block, pressure side and trailing edge with falling blocks simultaneous, or pressure side, suction side and trailing edge with falling blocks simultaneous of rotor blades cause an efficiency decrease of 0.44%, 1.6%, 0.03%, 0.67%, and 3.2%, respectively. Different blade squealer tip shapes have a smaller impact on the vibration deformation of the rotor blade, while trailing edge with falling block reduces the deformation of the rotor blade. Conclusions Based on the analysis results of comprehensive performance and vibration, rotor blades with falling blocks at pressure side, trailing edge, or both can continue to be used. However, it is not recommended to use rotor blades with falling blocks at suction side or pressure side, suction side and trailing edge.
标题：高压涡轮动叶叶尖掉块对气动性能及振动的影响
title:Impact of Falling Blocks of High Pressure Turbine Rotor Blades With Squealer Tip on the Aerodynamic Performance and Vibration Characteristics
作者：赵明阳, 殷林林, 韦文涛, 陈云, 刘日晨, 李军
authors:Mingyang ZHAO, Linlin YIN, Wentao WEI, Yun CHEN, Richen LIU, Jun LI
关键词：燃气轮机,高压涡轮,间隙泄漏,数值仿真,动叶叶尖,振动响应,
keywords:gas turbine,high pressure turbine,leakage flow,numerical simulation,rotor tip,vibration response,
发表日期：2024-10-31
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