Experimental investigation on the effects of particulate interference on radiation thermometry

• Published in: International journal of heat and mass transfer 2024-06, Vol.224, p.125350, Article 125350
• Main Authors: Huang, Yunwei, Qin, Jing, Long, Jianyu, Long, Mujun, Chen, Dengfu, Yang, Zhe, Li, Chuan
• Format: Article
• Language: English
• Subjects: Particulate interference; Radiation thermometry; Radiative heat transfer; Surface temperature measurement; Temperature measurement errors
• ISSN: 0017-9310
• DOI: 10.1016/j.ijheatmasstransfer.2024.125350

•A new radiometric temperature measurement platform under particulate interference was established.•Effects of water spray, smoke, soot, and flame on single-color and two-color radiation thermometry were studied qualitatively.•Effects of water flow rate, gas pressure, water spray layer's thickness, and target temperature on radiometric temperature measurement errors were investigated quantitatively. This paper established a radiation temperature measurement system with its optical path interfered with particulates and investigated the influence of particulate interference on single-color and two-color radiation thermometry qualitatively and quantitatively. The investigation revealed some experimental phenomena never reported before, and theoretical analysis was used to explain these observations. When path between pyrometer and target contained particulates, both single-color and two-color temperature measurements can either be lower or higher than true target temperature, and two-color temperature measurement errors may be greater or smaller than single-color temperature measurement errors, depending on the thermal properties, geometric properties, and radiation characteristics of the particulates. When the directions of temperature fluctuations caused by the particulates in single-color and two-color measurements were opposite, the true temperature value unaffected by the particulate lay between the two temperature values. When the fluctuation directions were identical, the temperature value with smoother fluctuation was closer to the true temperature value. The experimental conclusions presented in this paper contributed to a better understanding of the impact of particulates on radiation temperature measurement and can be used to further guide the correction of radiation temperature measurement errors caused by particulate interference.