Panoramic Scanning Optical Pyrometer for the Temperature Field Measurement of Turbine Components

2021 ◽  
pp. 1-1
Author(s):  
Chao Wang ◽  
Anmei Qiu ◽  
Zezhan Zhang ◽  
Peifeng Yu ◽  
Jingcai Jia ◽  
...  
Keyword(s):  
Temperature Field ◽  
Field Measurement ◽  
Optical Pyrometer

scholarly journals Application of Analytical Solution to Steady-State Temperature Field by Double-Row-Pipe Freezing and Verification with Field Measurement: A Case Study of Connected Aisle

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Zequn Hong ◽  
Xiangdong Hu
Keyword(s):  
Temperature Field ◽  
Steady State ◽  
Analytical Solution ◽  
Wall Thickness ◽  
Field Measurement ◽  
Field Analysis ◽  
Shield Tunnel ◽  
Double Row ◽  
Steady State Temperature ◽  
Frozen Wall

In order to solve the problem of sealing water and bearing capacity of a connected aisle in an underwater shield tunnel, a double-circle horizontal freezing method was adopted for ground reinforcement in the connected aisle of Maliuzhou Tunnel, which is China’s first shield tunnel with superlarge diameter built in a composite stratum. This paper proposed a new double-row-pipe freezing model for the calculation of frozen wall thickness based on analytical solution to steady-state temperature field. Besides, field measurement and transient numerical studies of the active freezing period were also carried out to study the freeze-sealing effect. The results show that frozen wall thickness obtained by analytical solutions agrees well with numerical simulation results, which verifies the applicability of the newly proposed calculation method. Field analysis indicates that soil temperature gradually approaches a stable value which is far below the freezing point, and a reliable water-sealing curtain can be formed around the designed connected aisle. Maximum impact of soil excavation on the frozen wall is about 10°C, and reducing exposure time of excavation surface can effectively alleviate the weakening of frozen wall. To obtain comprehensive analysis for freezing wall thickness, a more reasonable arrangement of temperature-measuring holes is expected in future freezing engineering.

Investigation on the Welding Temperature Field Measurement in Gas Tungsten Arc Welding

2011 ◽  
Vol 704-705 ◽  
pp. 786-789
Author(s):  
Guang Tao Zhou ◽  
Zi Yu Zhao ◽  
Guo Li Liang ◽  
Wei Hua Chen
Keyword(s):  
Thermal Conductivity ◽  
Temperature Field ◽  
Magnesium Alloy ◽  
Field Measurement ◽  
Arc Welding ◽  
Steel Plate ◽  
Welding Temperature ◽  
Alloy Plate ◽  
Az31b Magnesium Alloy ◽  
Gas Tungsten Arc

Based on the gas tungsten arc welding process this paper investigated the welding temperature field measurement and simulation of 945 steel plate and AZ31B magnesium alloy, using a non-contact and fast response measured temperature method-Infrared Radiation (IR)-which utilized the baffle to remove the arc and hot tungsten electrode interference, the top-face temperature of AZ31B magnesium alloy plate and 945 steel plate. The results indicated that the lengthwise isothermal map of 945 steel plate is much longer than that of AZ31B magnesium alloy plate, which leads to the most temperature field information loss, this is because the thermal conductivity of steel is small and decreases with temperature increase, the thermal conductivity of AZ31B magnesium alloy is much bigger that that of the 945 steel, about 1.5 times of 945 steel, and increased with temperature increase. The results also showed using IR to measure the welding temperature of magnesium alloy is more difficult than 945 steel. Keywords: magnesium alloy, high strength steel, welding temperature field, IR

General temperature field measurement by digital holography

2012 ◽  
Vol 52 (1) ◽  
pp. A319 ◽  
Author(s):  
Roman Doleček ◽  
Pavel Psota ◽  
Vít Lédl ◽  
Tomáš Vít ◽  
Jan Václavík ◽  
...  
Keyword(s):  
Temperature Field ◽  
Field Measurement ◽  
Digital Holography
Sign in / Sign up

Export Citation Format

Share Document