TY - JOUR
T1 - Optical thermometry for high temperature multiphase environments under high-flux irradiation
AU - Gu, Dahe
AU - Sun, Zhiwei
AU - Nathan, Graham J.
AU - Dong, Xue
AU - Dally, Bassam B.
AU - Medwell, Paul R.
AU - Alwahabi, Zeyad T.
N1 - Generated from Scopus record by KAUST IRTS on 2022-09-12
PY - 2017/1/1
Y1 - 2017/1/1
N2 - A non-intrusive optical method to measure gas phase temperature in strongly scattering multiphase environments under high-flux, broad-band irradiation, relevant to conditions in high temperature solar reactors was developed and demonstrated. The high-flux irradiation with a peak flux of 450 kW/m2was provided by a 6 kW metal-halide lamp coupled with a reflector and two concentrators. An ethylene/air diffusion flame, which contains fine soot particles, was employed to provide a high temperature reacting flow (approximately 1800 K) with strong optical interference from nano particles having a peak soot volume fractions of ∼16 ppm (with irradiation) under conditions of relevance to solar reactors. Under this environment, the proposed laser-based thermometry technique, line-wise two-line atomic fluorescence (TLAF) has been successfully demonstrated to measure flame temperature with good spatial resolution of ∼1 mm. It was found that the measurement accuracy in the presence of particle and the high-flux external radiation is 65 K at a typical flame temperature of ∼1800 K, while the measurement precision is 38 K. Results reveal that the presence of high-flux irradiation increases the flame temperature by typically 50–100 K. This paper presents a thermometry technique that is suitable for temperature measurement within solar reactors, particularly in hybrid solar-thermal receiver-combustor systems. The experimental setup, measurement methodology and data processing are discussed, followed by the temperature measurements.
AB - A non-intrusive optical method to measure gas phase temperature in strongly scattering multiphase environments under high-flux, broad-band irradiation, relevant to conditions in high temperature solar reactors was developed and demonstrated. The high-flux irradiation with a peak flux of 450 kW/m2was provided by a 6 kW metal-halide lamp coupled with a reflector and two concentrators. An ethylene/air diffusion flame, which contains fine soot particles, was employed to provide a high temperature reacting flow (approximately 1800 K) with strong optical interference from nano particles having a peak soot volume fractions of ∼16 ppm (with irradiation) under conditions of relevance to solar reactors. Under this environment, the proposed laser-based thermometry technique, line-wise two-line atomic fluorescence (TLAF) has been successfully demonstrated to measure flame temperature with good spatial resolution of ∼1 mm. It was found that the measurement accuracy in the presence of particle and the high-flux external radiation is 65 K at a typical flame temperature of ∼1800 K, while the measurement precision is 38 K. Results reveal that the presence of high-flux irradiation increases the flame temperature by typically 50–100 K. This paper presents a thermometry technique that is suitable for temperature measurement within solar reactors, particularly in hybrid solar-thermal receiver-combustor systems. The experimental setup, measurement methodology and data processing are discussed, followed by the temperature measurements.
UR - https://linkinghub.elsevier.com/retrieve/pii/S0038092X17301172
UR - http://www.scopus.com/inward/record.url?scp=85014004429&partnerID=8YFLogxK
U2 - 10.1016/j.solener.2017.02.024
DO - 10.1016/j.solener.2017.02.024
M3 - Article
SN - 0038-092X
VL - 146
SP - 191
EP - 198
JO - Solar Energy
JF - Solar Energy
ER -
