Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring
Abstract Fiber Bragg gratings (FBGs) offer new possibilities to monitor accurately the rotor temperature. Dozens of sensors can be mounted in series in a single fiber and used to measure the temperature in several points of the rotor winding. Such sensors installed directly on the rotor winding surf...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Microondas e Optoeletrônica; Sociedade Brasileira de Eletromagnetismo
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| Series: | Journal of Microwaves, Optoelectronics and Electromagnetic Applications |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000200445&lng=en&tlng=en |
| _version_ | 1818334095460007936 |
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| author | R.C. Leite V. Dmitriev C. Hudon S. Gingras C. Guddemi J. Piccard L. Mydlarsky |
| author_facet | R.C. Leite V. Dmitriev C. Hudon S. Gingras C. Guddemi J. Piccard L. Mydlarsky |
| author_sort | R.C. Leite |
| collection | DOAJ |
| description | Abstract Fiber Bragg gratings (FBGs) offer new possibilities to monitor accurately the rotor temperature. Dozens of sensors can be mounted in series in a single fiber and used to measure the temperature in several points of the rotor winding. Such sensors installed directly on the rotor winding surface are thermally isolated from the cooling air by a silicone layer. Because of the temperature gradient in this structure, the sensor is exposed to thermo-mechanical stresses and therefore can be deformed. Since the FBG probes are sensitive to both temperature and strain, the knowledge of each effect separately is necessary to ensure that the temperature readings are not affected by strain. Experimental results obtained in rotor winding mockup tests with thermistors and FBG sensors show that the temperature readings by the FBG are 4.5°C above the temperature defined by the thermistors which were used as references. Multi-physics simulations were carried out to calculate the strain and temperature in the FBG assembly. The theoretical and experimental results are in a good agreement. |
| first_indexed | 2024-12-13T14:02:05Z |
| format | Article |
| id | doaj.art-f347a5e802894584bbd46fd05a5417b7 |
| institution | Directory Open Access Journal |
| issn | 2179-1074 |
| language | English |
| last_indexed | 2024-12-13T14:02:05Z |
| publisher | Sociedade Brasileira de Microondas e Optoeletrônica; Sociedade Brasileira de Eletromagnetismo |
| record_format | Article |
| series | Journal of Microwaves, Optoelectronics and Electromagnetic Applications |
| spelling | doaj.art-f347a5e802894584bbd46fd05a5417b72022-12-21T23:42:42ZengSociedade Brasileira de Microondas e Optoeletrônica; Sociedade Brasileira de EletromagnetismoJournal of Microwaves, Optoelectronics and Electromagnetic Applications2179-107416244545910.1590/2179-10742017v16i2818S2179-10742017000200445Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature MonitoringR.C. LeiteV. DmitrievC. HudonS. GingrasC. GuddemiJ. PiccardL. MydlarskyAbstract Fiber Bragg gratings (FBGs) offer new possibilities to monitor accurately the rotor temperature. Dozens of sensors can be mounted in series in a single fiber and used to measure the temperature in several points of the rotor winding. Such sensors installed directly on the rotor winding surface are thermally isolated from the cooling air by a silicone layer. Because of the temperature gradient in this structure, the sensor is exposed to thermo-mechanical stresses and therefore can be deformed. Since the FBG probes are sensitive to both temperature and strain, the knowledge of each effect separately is necessary to ensure that the temperature readings are not affected by strain. Experimental results obtained in rotor winding mockup tests with thermistors and FBG sensors show that the temperature readings by the FBG are 4.5°C above the temperature defined by the thermistors which were used as references. Multi-physics simulations were carried out to calculate the strain and temperature in the FBG assembly. The theoretical and experimental results are in a good agreement.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000200445&lng=en&tlng=enHydro generatorrotorfiber Bragg gratingtemperature measurement |
| spellingShingle | R.C. Leite V. Dmitriev C. Hudon S. Gingras C. Guddemi J. Piccard L. Mydlarsky Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring Journal of Microwaves, Optoelectronics and Electromagnetic Applications Hydro generator rotor fiber Bragg grating temperature measurement |
| title | Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring |
| title_full | Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring |
| title_fullStr | Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring |
| title_full_unstemmed | Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring |
| title_short | Analysis of Thermo-Mechanical Stress in Fiber Bragg Grating Used for Hydro-Generator Rotor Temperature Monitoring |
| title_sort | analysis of thermo mechanical stress in fiber bragg grating used for hydro generator rotor temperature monitoring |
| topic | Hydro generator rotor fiber Bragg grating temperature measurement |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742017000200445&lng=en&tlng=en |
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