镍铬-镍硅热电偶特性分析与应用研究

Application and characteristic analysis of nickel-chromium and nickel-silicon thermocouple

以镍铬-镍硅热电偶在火箭发动机试验中的应用为研究对象。对其特性和影响测量的主要因素进行了论述。对镍铬-镍硅热电偶在使用中的劣化问题进行了研究和探讨,结果表明重复使用后的镍铬-镍硅热电偶的劣化是不可避免的,其劣化程度随封装形式、使用温度、直径及使用时间的不同而异,并根据多次试验数据的积累,总结出了相应的处理方法。

Taking the application of nickel-chromium and nickel-silicon thermocouple in the rocket engine test as a research object, its characteristic and the main factors of affecting measurement are elaborated, and the degradation existing in the application of the nickel-chromium and nickel-silicon thermocouple is analyzed and discussed. The result shows that the degradation of the nickel-chromium and nickel-silicon thermocouple is unavoidable, and the degradation can be different with its packaging, temperature, diameter and working duration. The K state and preferred oxidation of nickel-chromium and nickel-silicon thermocouple, as well as its effects on measurement are described in this paper. The method of thermocouple treatment is concluded according to the data obtained in the past tests.