SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING
The experiments under the coupling of the multi-physics field don’t have the conditions to be carried out in the heat exchange tubes fouling test. And it’s very important to establish the accurate ultrasonic propagation model for achieving the numerical simulation of selecting the detection frequenc...
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| Language: | zho |
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Editorial Office of Journal of Mechanical Strength
2019-01-01
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| Series: | Jixie qiangdu |
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| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2019.01.013 |
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| _version_ | 1841535609926057984 |
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| author | SUN LingFang WANG TongTong LI Xia PIAO Heng |
| author_facet | SUN LingFang WANG TongTong LI Xia PIAO Heng |
| author_sort | SUN LingFang |
| collection | DOAJ |
| description | The experiments under the coupling of the multi-physics field don’t have the conditions to be carried out in the heat exchange tubes fouling test. And it’s very important to establish the accurate ultrasonic propagation model for achieving the numerical simulation of selecting the detection frequency. Based on the finite element method,the three-dimension model with different heat exchange tubes had been established under the COMSOL Multiphysics condition. The varied relationship of the ultrasonic wave propagation,the different heat exchange tubes and echo exciting frequency were discussed respectively. The characteristic frequency and echo vibration mode of multi-layer tubes were found. The results show that the relationship between different characteristics of the heat exchange tubes（ material and wall thickness） and pressure load is similar. The ultrasonic time-domain reflectometry technology to detect the thickness of the tube fouling needs to select 5 MHz echo exciting frequency at least for inhibiting the pseudo-Gibbs oscillation. The optimal detection frequency is 10 MHz,and the detection effect is the best when the thickness at 3 mm ～ 5 mm. The numerical simulation agrees with the test results,and ultrasonic detection produces an error around ±5% in examining tube fouling deposit. These results provide a basis for quantitative detecting basis to select the characteristic frequency under the different tubes. |
| format | Article |
| id | doaj-art-38d1bdcf2cbf4844b3c0a90d0bb5d432 |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2019-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-38d1bdcf2cbf4844b3c0a90d0bb5d4322025-01-15T02:30:40ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692019-01-0141727930603897SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULINGSUN LingFangWANG TongTongLI XiaPIAO HengThe experiments under the coupling of the multi-physics field don’t have the conditions to be carried out in the heat exchange tubes fouling test. And it’s very important to establish the accurate ultrasonic propagation model for achieving the numerical simulation of selecting the detection frequency. Based on the finite element method,the three-dimension model with different heat exchange tubes had been established under the COMSOL Multiphysics condition. The varied relationship of the ultrasonic wave propagation,the different heat exchange tubes and echo exciting frequency were discussed respectively. The characteristic frequency and echo vibration mode of multi-layer tubes were found. The results show that the relationship between different characteristics of the heat exchange tubes（ material and wall thickness） and pressure load is similar. The ultrasonic time-domain reflectometry technology to detect the thickness of the tube fouling needs to select 5 MHz echo exciting frequency at least for inhibiting the pseudo-Gibbs oscillation. The optimal detection frequency is 10 MHz,and the detection effect is the best when the thickness at 3 mm ～ 5 mm. The numerical simulation agrees with the test results,and ultrasonic detection produces an error around ±5% in examining tube fouling deposit. These results provide a basis for quantitative detecting basis to select the characteristic frequency under the different tubes.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2019.01.013Heat exchange tube foulingUltrasonic echoCharacteristic frequencyNumerical simulationDetection |
| spellingShingle | SUN LingFang WANG TongTong LI Xia PIAO Heng SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING Jixie qiangdu Heat exchange tube fouling Ultrasonic echo Characteristic frequency Numerical simulation Detection |
| title | SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING |
| title_full | SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING |
| title_fullStr | SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING |
| title_full_unstemmed | SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING |
| title_short | SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING |
| title_sort | simulation and experiments on selecting the echo frequency in detecting the heat exchange tube fouling |
| topic | Heat exchange tube fouling Ultrasonic echo Characteristic frequency Numerical simulation Detection |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2019.01.013 |
| work_keys_str_mv | AT sunlingfang simulationandexperimentsonselectingtheechofrequencyindetectingtheheatexchangetubefouling AT wangtongtong simulationandexperimentsonselectingtheechofrequencyindetectingtheheatexchangetubefouling AT lixia simulationandexperimentsonselectingtheechofrequencyindetectingtheheatexchangetubefouling AT piaoheng simulationandexperimentsonselectingtheechofrequencyindetectingtheheatexchangetubefouling |