航空学报 > 2025, Vol. 46 Issue (16): 131662-131662   doi: 10.7527/S1000-6893.2025.31662

融合发射率预识别和白鲨优化算法的高温表面温度场多光谱测量方法

张正军1, 黄益智1, 刘艳2, 张彪1, 徐祥2, 许传龙1()   

  1. 1.东南大学 能源与环境学院 大型发电装备安全运行与智能测控国家工程研究中心,南京 210096
    2.中国科学院 工程热物理研究所,北京 100190
  • 收稿日期:2024-12-13 修回日期:2025-02-12 接受日期:2025-03-04 出版日期:2025-03-07 发布日期:2025-03-06
  • 通讯作者: 许传龙 E-mail:chuanlongxu@seu.edu.cn
  • 基金资助:
    国家自然科学基金(52376158);连云港市科技计划创新能力建设项目(CX2207)

Multi-spectral measurement method for high-temperature surface temperature field through emissivity pre-recognition and White Shark optimization algorithm

Zhengjun ZHANG1, Yizhi HUANG1, Yan LIU2, Biao ZHANG1, Xiang XU2, Chuanlong XU1()   

  1. 1.National Engineering Research Center of Power Generation Control and Safety,School of Energy and Environment,Southeast University,Nanjing 210096,China
    2.Institute of Engineering Thermophtsics,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2024-12-13 Revised:2025-02-12 Accepted:2025-03-04 Online:2025-03-07 Published:2025-03-06
  • Contact: Chuanlong XU E-mail:chuanlongxu@seu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52376158);Innovation Capacity Building of Lianyungang City Science and Technology Plan Project(CX2207)

摘要:

多光谱测温技术在燃气轮机的涡轮叶片、燃烧室等高温部件表面温度测量领域有着广泛应用。然而,缺乏被测目标先验发射率信息,多光谱测温技术常产生较大误差,限制了该技术的实际应用。为此,提出了一种融合发射率预识别的燃气轮机高温部件表面多光谱温度反演方法,该方法将欠定的辐射方程求解问题转化为目标函数的约束优化问题。首先基于灰体假设耦合广义逆矩阵法,获得发射率的取值范围,将其作为约束条件加入目标函数。进一步利用白鲨优化算法,实现发射率约束后目标函数的高精度温度求解。对不同温度下,6种不同的发射率模型的高温壁面开展了数值模拟,讨论了所提出算法参数的取值,并研究了其温度重建性能。最后,开展了高温壁面温度测量实验研究。数值模拟结果表明,800~1 000 K温度下,温度反演最大误差1.95%。在实验室条件下,测温结果与热电偶的最大偏差为2.01%,验证了融合发射率预识别和白鲨优化算法的表面温度场多光谱测量方法具有较高的精度和稳定性。

关键词: 多光谱测温, 发射率, 预识别, 温度, 白鲨优化算法

Abstract:

Multispectral thermometer is widely used for temperature measurement of high temperature components in gas turbines such as turbine blades and combustion chambers. However, without the prior emissivity information of the measured target, the multi-spectral thermometer often results in large measurement error, which limits its practical application. In this paper, a multi-spectrum radiation-based temperature inversion method integrating emissivity pre-recognition is proposed. This method transforms the underdetermined radiation equations into a constrained optimization problem of the objective function. Based on the grey body hypothesis and generalized inverse matrix method, the range of emissivity is firstly obtained and added to the objective function as a constraint. The White Shark optimization algorithm is further used to achieve the high-precision temperature solution of the constrained objective function. The key parameters and reconstruction performance of the proposed algorithm are discussed on the six simulated emissivity models at different temperatures. The simulation results showed that the maximum error of the temperature inversion is 1.95% at 800-1 000 K. Finally, the temperature measurement experiments are carried out on a high temperature surface in the lab. The maximum deviation of the measured temperature between the proposed method and the thermocouple is 2.01%, verifying that the proposed multi-spectral measurement method has high accuracy and stability.

Key words: multi-spectral temperature measurement, emissivity, pre-recognition, temperature, White Shark optimization algorithm

中图分类号: