作者：王棒¹, 李亦军¹, 王高², 王凯², 曾行昌³, 李铁林³

作者单位：1. 中北大学理学院, 山西 太原 030051;
2. 中北大学信息与通信工程学院, 山西 太原 030051;
3. 中国飞行试验研究院, 陕西 西安 710089

关键词：超声测温;燃烧室;温度分布;蓝宝石光纤

摘要：

发动机燃烧室出口的温度分布对于推进技术的发展具有重要意义，而现阶段发动机内部温度已达1 800℃以上，主要测温手段辐射测温和热电偶受限于限于精度和材料，对这种高温氧化环境无法测试。该文依据超声测温原理，设计了一套可以在超高温氧化环境下用一根蓝宝石光纤测量多点温度的温度分布测试系统，并且在20~1 800℃范围内进行标定并多次校准。实验结果表明该系统测量精确、重复性良好，在1 600℃时灵敏度为0.004 μs/℃，重复性达98.4%。在加装滞止罩后将感温元件封装于发动机燃烧室出口处，经过多此实验，测得了该燃烧室运行时出口处径向温度分布。

A new type sensor for measuring the temperature distribution of engine combustion chamber outlet
WANG Bang¹, LI Yijun¹, WANG Gao², WANG Kai², ZENG Xingchang³, LI Tielin³
1. School of Science, North University of China, Taiyuan 030051, China;
2. School of Information and Communication Engineering, North University of China, Taiyuan 030051, China;
3. Chinese Flight Test Establishment, Xi'an 710089, China
Abstract: The temperature distribution of the engine combustion chamber outlet is of great significance for the development of propulsion technology. At this stage, the internal temperature of the engine has reached 1 800 ℃ or above. The main temperature measurement means radiation temperature measurement and thermocouple are limited to the accuracy and materials that cannot be tested in this high temperature oxidation environment. Based on the principle of ultrasonic temperature measurement, this paper designs a temperature distribution test system that can measure multi-point temperature with a sapphire fiber in an ultra-high temperature oxidation environment, and calibrates and calibrates it in the range of 20-1 800 ℃. The experimental results show that the system is accurate and reproducible. The sensitivity is 0.004 μs/℃ at 1 600 ℃ and the repeatability is 98.4%. After the stagnation cover is installed, the temperature sensing element is packaged at the exit of the engine combustion chamber. After many experiments, the radial temperature distribution at the exit of the combustion chamber is measured.
Keywords: ultrasonic temperature measurement;combustion chamber;temperature distribution;sapphire fiber
2019, 45(8):112-117  收稿日期: 2019-02-10;收到修改稿日期: 2019-03-25
基金项目: 航空科学基金（2017ZD30004）
作者简介: 王棒(1995-),男,山西晋城市人,硕士研究生,专业方向为超声测温技术
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