An acoustic tomography temperature measurement based on grid non-uniform discretization was proposed
and discretization factors were defined to quantify the sparse and dense distribution characteristics of grid cells in space. After which
Green's biharmonic interpolation algorithm was introduced
while comparisons and analyses were conducted on the reconstruction performance of various discretization methods
including uniform discretization
non-uniform discretization based on different discretization factor settings
and odd/even-numbered grid divisions. Results show that by non-uniform discretization with fewer measurement points
the accuracy of reconstruction results can be improved
and the peak value of temperature field can be reconstructed more accurately. In addition
when reconstructing the single-peak symmetric temperature field
odd-numbered grid discretization is prior to even-numbered grid discretization.
关键词
Keywords
references
沈国清, 杨杰栋, 陈栋, 等. 基于二次相关PHAT-β算法的锅炉声学测温时延估计研究[J]. 动力工程学报, 2018, 38(8): 617-623. SHEN Guoqing, YANG Jiedong, CHEN Dong, et al. Study on time delay estimation of boiler acoustic temperature measurement based on second correlation PHAT-β algorithm[J]. Journal of Chinese Society of Power Engineering, 2018, 38(8): 617-623.
郭美丽, 姜根山, 于淼, 等. 火焰燃烧区域空气声速与温度关系的实验研究[J]. 声学技术, 2023, 42(3): 275-280. GUO Meili, JIANG Genshan, YU Miao, et al. Research on the relationship between temperature and sound velocity of air in the flame burning zone[J]. Technical Acoustics, 2023, 42(3): 275-280.
姚鹏搏, 孙铭阳, 王元, 等. 基于塔克分解和声学测温的三维温度场重建[J]. 动力工程学报, 2024, 44(4): 557-565. YAO Pengbo, SUN Mingyang, WANG Yuan, et al. Three-dimensional temperature field reconstruction based on tucker decomposition and acoustic thermometry[J]. Journal of Chinese Society of Power Engineering, 2024, 44(4): 557-565.
沈国清, 安连锁, 姜根山, 等. 电站锅炉声学测温中时间延迟估计的仿真研究[J]. 中国电机工程学报, 2007, 27(11): 57-61. SHEN Guoqing, AN Liansuo, JIANG Genshan, et al. Simulation of time delay estimation in acoustic pyrometry in power plant boiler[J]. Proceedings of the CSEE, 2007, 27(11): 57-61.
沈国清, 张世平, 安连锁. 声学测温在混响和高噪声条件下的时延估计研究[J]. 动力工程学报, 2014, 34(7): 529-533, 563. SHEN Guoqing, ZHANG Shiping, AN Liansuo. Study on time delay estimation in acoustic pyrometry under reverberation and high noise environments[J]. Journal of Chinese Society of Power Engineering, 2014, 34(7): 529-533, 563.
LIU Qi, ZHOU Bin, ZHANG Jianyong, et al. A novel time-of-flight estimation method of acoustic signals for temperature and velocity measurement of gas medium[J]. Experimental Thermal and Fluid Science, 2023, 140: 110759.
OTHMANI C, DOKHANCHI N S, MERCHEL S, et al. Acoustic tomographic reconstruction of temperature and flow fields with focus on atmosphere and enclosed spaces: a review[J]. Applied Thermal Engineering, 2023, 223: 119953.
颜华, 王善辉, 刘丽钧, 等. 一种考虑声线弯曲的温度场重建算法[J]. 声学学报, 2014, 39(6): 705-713. YAN Hua, WANG Shanhui, LIU Lijun, et al. A reconstruction algorithm of temperature field taking into account the bending of sound wave paths[J]. Acta Acustica, 2014, 39(6): 705-713.
ZHANG Lifeng, DONG Xianghu. Acoustic tomography temperature distribution reconstruction based on dual-domain feature fusion network[J]. International Journal of Heat and Mass Transfer, 2024, 235: 126232.
OTHMANI C, ZER M S, MERCHEL S, et al. Does loudspeaker directivity really influence the reconstructed indoor temperature quality using acoustic travel-time tomography?[J]. Applied Acoustics, 2025, 230: 110419.
BARATHULA S, CHAITANYA S K, ALAPATI J K K, et al. Precise temperature reconstruction in acoustic pyrometry: impact of domain discretization and transceiver count[J]. Applied Thermal Engineering, 2024, 238: 122009.
贾韶琦, 宋志江, 李言钦, 等. 炉内温度速度耦合场声线弯曲特性研究[J]. 动力工程学报, 2021, 41(8): 617-623. JIA Shaoqi, SONG Zhijiang, LI Yanqin, et al. Research on the sound ray bending characteristics of temperature-velocity coupling field in furnace[J]. Journal of Chinese Society of Power Engineering, 2021, 41(8): 617-623.
许丰, 贺日政, 张贵宾. 格林样条插值算法及其应用[J]. 地球物理学进展, 2013, 28(4): 1721-1728. XU Feng, HE Rizheng, ZHANG Guibin, et al. Green's function-based interpolator and its application[J]. Progress in Geophysics, 2013, 28(4): 1721-1728.