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学科主题: Geochemistry & Geophysics
题名: Optimizing probe structure for dual-probe seafloor heat flow meter
作者: Yang, XQ ; Shi, XB ; Xu, HH ; Xu, X ; Li, GB ; Guo, XW ; Luo, XH
通讯作者: yxq2081@scsio.ac.cn
关键词: Dual-probe seafloor heat flow meter ; Structure optimization ; Dual-probe heat pulse (DPHP) method ; Pulsed Finite Line Source (PFLS) model ; Finite element numerical modeling
刊名: CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
发表日期: 2009
卷: 52, 期:5, 页:1280-1288
收录类别: sci
部门归属: [Yang Xiao-Qiu; Shi Xiao-Bin; Xu He-Hua] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Yang Xiao-Qiu] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China; [Xu Xing; Luo Xian-Hu] Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China; [Li Guan-Bao] State Oceanog Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China; [Guo Xing-Wei] Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China
项目归属: 海洋地质
摘要: This paper alms to optimize the probe structure for dual-probe seafloor heat flow meter. Firstly, with a constructed finite element model for seafloor pulsing dual-probe, a series of temperature-time data, which are used as the "observed" data, can be obtained by giving different probe structures and thermal properties. Then, we calculated medium thermal conductivity and its corresponding maximum relative error (RE lambda-UL) by using Pulsed Finite Line Source (PFLS) model, and optimize the probe structure in which RE lambda-UL is minimized. Finally, we optimized dual-probe structure with the now available manufacture technique of seafloor heat flow probe. Our results show that: (1) under each distinct combination of probe heat pulse strength (q), temperature measurement error (Delta T-m) and probe length (L), there must be a best probe spacing (Best_r), at that position, RE lambda-UL is least; (2) Best_r can be accordingly increased with q increasing or Delta T-m decreasing; (3) when q,Delta T-m and probe radius (a) are given! there is a significant linear positive correlation between Best_r and L; (4) when a is 1.0 mm, q is from 628.0 similar to 1100.0 J . m(-1), Delta T-m is from 0.5 mK to 1.0 mK, and L is from 20.0 mm to 42. 0 mm, Best_r ranges from 18.0 mm to 30.0 mm. In this case, the maximum relative error in medium thermal conductivity is within 5.5%, meanwhile, it reaches the maximum measurement temperature within 6 minutes, which means that the temperature measurement just needs about 7 minutes to calculate medium thermal conductivity after the beginning of pulse heating, which is about 8 minutes shorter than that of the Lister-type heat flow meter.
原文出处: 查看原文
WOS记录号: WOS:000266542700017
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4620
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Yang, XQ; Shi, XB; Xu, HH; Xu, X; Li, GB; Guo, XW; Luo, XH.Optimizing probe structure for dual-probe seafloor heat flow meter,CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2009,52(5):1280-1288
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