KOU Y D, LIU C.Water-heat coupling test based on optical fiber temperature measurement with high-precious[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(3):88-94.

doi:10.16186/j.cnki.1673-9787.2021030040

Received:2021/03/10

Revised:2021/06/04

Published:2023/05/25

Water-heat coupling test based on optical fiber temperature measurement with high-precious

KOU Yudong1, LIU Chun1,2

1.School of Earth Science and Engineering，Nanjing University，Nanjing  210023，Jiangsu，China;2.High-tech Research Institute，Nanjing University（Suzhou），Suzhou  215123，Jiangsu，China

Abstract:In order to study the water-heat coupling process and its influence factors in urban subsurface，an indoor test platform with high-precision sensors was designed to operate the water-heat coupling test considering temperature，seepage and coverage types herein to recognize distributed monitoring of temperature field.Results indicated that：The change of soil temperature field under seepage was more intensive，the larger flow rate makes heat rate increase by dozens of times；The higher temperature or temperature difference between soil and flow，the greater temperature field changed；Heating process of the soil under different coverage was distinct，the heat rate of the soil under polyethylene board was the lowest；The heating rate was same with the same soil properties，especially higher permeability was benefit to heat and flow transmission；The covering types weakened the seepage’s diffusion，disturbed seepage field，affected the distribution of temperature field；The seepage，carrying heat，disturbed the initial state of heat convection and motivated a new temperature field to appear；Heat affected the viscosity coefficient of seepage and changed seepage field，those of three factors were coupled to determine the soil temperature field.

Key words:seepage of groundwater;coverage type;water-heat coupling;high precision sensor

基于高精度光纤测温的水热耦合试验_寇玉冬.pdf