基于激光干涉的可调圆形尾喷管喉部面积标定方法研究  

Rapid Calibration Method of Throat Area of Geometry-Variable Circular Nozzle Based on Laser Interference

作　　者：樊金侠 傅骁[1] 颜荣 李杰 梁春疆 段发阶[1] FAN Jinxia;FU Xiao;YAN Rong;LI Jie;LIANG Chunjiang;DUAN Fajie(The State Key Lab of Precision Measuring Technology and Instruments,Tianjin 300072,China;AECC Sichuan Gas Turbine Research Establishment,Mianyang 611730,China;Smartmens(Tianjin)Technology Co.,Ltd.,Tianjin 300382,China)

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]中国航发四川燃气涡轮研究院,绵阳611730 [3]善测(天津)科技有限公司,天津300382

出　　处：《航空制造技术》2023年第7期43-49,共7页Aeronautical Manufacturing Technology

基　　金：国家重点研发计划(2020YFB2010800);国家自然科学基金(61905175,61971307);国家重点实验室探索性课题(Pilt2103);霍英东教育基金会资助(171055);青年人才托举工程(2021QNRC001);广东省重点研发计划(2020B0404030001);国防科技重点实验室基金(6142212210304);中国航发四川燃气涡轮研究院外委课题(GJCZ–2021–0029,GJCZ–2020–0040)。

摘　　要：航空发动机可调尾喷管喉部面积直接影响其气动性能,传统上使用内径千分尺测量喉部尺寸,存在效率低下、喷口密封片下垂影响测量精度等问题。因此,提出一种基于激光干涉的可调圆形尾喷管喉部面积标定方法,设计激光干涉光路内置的同轴式长度测量结构,采用压力传感器实时反馈实现推力自适应控制,利用喉部尺寸测量数据计算喉部多边形面积,基于最小二乘法建立喉部面积与发动机控制信号之间的关联模型,实现喉部面积快速标定。试验结果证明,研制系统的尺寸测量精度为41μm,建立面积标定模型的拟合优度为0.98147,具有操作简捷、快速的特点,满足航空发动机测试需求。The throat area of the geometry-variable nozzle directly affects the performance of the aero-engine.The inner diameter micrometer is traditionally used to measure the throat size,which has some problems,such as low efficiency and droop of the nozzle seal affecting the measurement accuracy.Therefore,we put forward a calibration method for throat area of tunable circular nozzle based on laser interference.Firstly,a coaxial length measurement structure is designed which features built-in laser interference optical path.A pressure sensor is utilized to give real-time feedback to automatically control the thrust.Then the polygon throat area of the nozzle is calculated from the dimensional measurement data.Finally,the correlation model between throat area and engine control signal is established based on the least square method.The experimental result shows that the size measurement accuracy of the developed system is 41μm,the area calibration accuracy is 0.98147,and the method features good simplicity and convenience.

关 键 词：航空发动机 尾喷管 喉部面积 尺寸测量 激光干涉 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]