涡扇发动机喷口反馈系统参数设计与应用  

Parameter design and application of turbofan engine nozzle feedback system

作　　者：崔向敏 刘凡 邵彬彬 马健 郭垒 李琦 CUI Xiangmin;LIU Fan;SHAO Binbin;MA Jian;GUO Lei;LI Qi(Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500

出　　处：《航空动力学报》2025年第2期267-279,共13页Journal of Aerospace Power

摘　　要：为了保证涡扇发动机工作过程中喷口反馈系统的实时反馈精度,以喷口反馈系统参数的合理设计为目标,通过运动分析建立冷热态数学模型,运用Spearman秩相关系数法对喷口反馈系统参数进行敏感性分析,提出参数设计方法并通过工程应用验证。研究结果表明:喷口反馈系统工作过程中喷口喉道直径与反馈角度的关系呈线性。补偿钢索支撑点到滑轮支撑铰点的距离、滑轮支撑摇臂与反馈支撑摇臂的夹角、滑轮初始圆心到滑轮支撑铰点的距离是影响喷口反馈系统实时反馈精度的主要参数,影响程度相当。利用提出的参数设计方法,通过全局寻优,能找到保证实时反馈精度的参数最优解。将研究成果应用于某型发动机,热膨胀前后喷口喉道直径与反馈角度的线性关系一致性好(相同反馈角度时喷口喉道面积差异在0.17%以内),能够有效保证喷口反馈系统的实时反馈精度,验证了本文喷口反馈系统参数设计方法合理有效。In order to ensure the real-time feedback accuracy of the nozzle feedback system during the working process of the turbofan engine,the mathematical model of hot and cold states was established by motion analysis for reasonable design of the nozzle feedback system parameters,and the Spearman rank correlation coefficient method was used to analyze the sensitivity of the nozzle feedback system parameters.The method of parameter design was put forward and verified by engineering application.Results showed that the relationship between nozzle throat diameter and feedback angle was linear in the process of nozzle feedback system.The distance from the support point of the compensation to the support point of the pulley,the angle between the pulley support rocker arm and the feedback support rocker arm,and the distance from the initial center of the pulley to the pulley support hinge point constituted the main parameters affecting the real-time feedback accuracy of the nozzle feedback system,and the influence of the three parameters was similar.The optimal solution of the parameters can be found to ensure the realtime feedback accuracy of the nozzle feedback system through global optimization using the established parameter design method.The application of this research result on a certain type of aero-engine showed a high consistency of the linear relationship between the nozzle throat diameter and the feedback angle(the difference in nozzle throat area was within 0.17%at the same feedback angle),which can effectively ensure the real-time feedback accuracy of the nozzle feedback system,verifying the rationality and effectiveness of the parameter design method for the nozzle feedback system.

关 键 词：喷口反馈系统 实时反馈精度 参数设计 冷热态分析 敏感性分析 Spearman秩相关系数 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]