声学高温计拓扑结构优化研究  

Study on optimization of acoustic pyrometer topological structure

作　　者：赵乂鋆 赵俭[1] 陈鑫虎 ZHAO Yijun;ZHAO Jian;CHEN Xinhu(Changcheng Institute of Metrology and Measurement,Beijing 100095,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2023年第5期15-23,共9页Metrology & Measurement Technology

摘　　要：声学高温计存在探头温度耐受不够,测温稳定性较差,易受气流速度影响的问题。为了提高声学高温计的测温可靠性,本文提出在Virtual.Lab中建立相应的气流温度场和声传播模型,改变现有的一套声学高温计的声探头分布直径、朝向和倾斜角度等拓扑结构,分析并研究减小声压级衰减的最佳拓扑结构参数,并进行试验对比。最终发现在常温至900℃、0~0.3 Ma的气流温度场环境中,直径15 cm,声探头与水平面倾角为30°的拓扑结构综合声压级减小数值最小;直径20 cm,声探头与水平面倾角为15°的拓扑结构次之。二者均比现有的拓扑结构数据标准差减小17%以上,提高了声源信号接收的性能,进而提高声学高温计在常温至900℃、0~0.3 Ma的气流温度场环境中测温的可靠性。Acoustic pyrometers still have such problems as insufficient probe temperature tolerance,poor temperature measurement stability,and susceptibility to the impact of airflow velocity.In order to improve the temperature measurement reliability of acoustic pyrometer,this paper establishes a corresponding airflow temperature field and sound propagation model in Virtual.Lab.The optimal topological parameters to reduce sound pressure level attenuation were analyzed and studied by changing the topological structure such as the acoustic probe distribution diameter,orientation,and tilt angle of an existing set of acoustic pyrometers,and experimental comparison was carried out.Finally,it was found that the topology structure with a diameter of 15 cm and an inclination angle of 30 degrees between the acoustic probe and the horizontal plane had the smallest comprehensive sound pressure level reduction value in the airflow temperature field environment with temperature from normal atmospheric temperature to 900℃and Mach number from 0 to 0.3.The topology structure with a diameter of 20 cm and an inclination angle of 15 degrees took the second place.In conclusion,both topology structures reduce the standard deviation of data by more than 17%compared to existing topology structure,which improve the performance of acoustic source signal reception,therefore,improving the reliability of acoustic pyrometer temperature measurement in the airflow temperature field environment of temperature from normal to 900℃and Mach number from 0 to 0.3.

关 键 词：声学测温 结构优化 仿真分析 

分 类 号：TB9[一般工业技术—计量学] TH811[机械工程—测试计量技术及仪器]