Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft
Aiming at the problem wherein temperature inversion accuracy is unstable due to the major differences in atmospheric transmittance under various observation paths, a method for measuring radiation characteristics of an aircraft engine’s hot parts and skin using a cooled middle-wave infrared camera i...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Machines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-1702/10/1/44 |
| _version_ | 1827664741389041664 |
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| author | Xuan Deng Yueming Wang Guicheng Han Tianru Xue |
| author_facet | Xuan Deng Yueming Wang Guicheng Han Tianru Xue |
| author_sort | Xuan Deng |
| collection | DOAJ |
| description | Aiming at the problem wherein temperature inversion accuracy is unstable due to the major differences in atmospheric transmittance under various observation paths, a method for measuring radiation characteristics of an aircraft engine’s hot parts and skin using a cooled middle-wave infrared camera is proposed. Based on the analysis of the aircraft’s infrared radiation characteristics, the atmospheric transmission model of any observation path was revised, the absolute radiation correction model was established, and the temperature inversion equation was calculated. Then, we used the quasi-Newton method to calculate the skin temperature and discussed uncertainty sources. After the theoretical study, an outfield test was carried out. A middle-wave infrared camera with a wavelength of 3.7–4.8 μm was applied to the actual experimental observation of the turbofan civil aviation aircraft. The ground observation distance was 15 km, and the flying height was 3 km. When implementing temperature inversion with the method presented in this paper, the surface temperature of the aircraft engine hot parts was 381 K, the correction uncertainty was ±10 K, the surface temperature of the skin was 296 K, and the correction uncertainty was ±6 K. As the experiment showed, the method in this paper can effectively implement infrared target temperature inversion and provide a reference for the quantification of infrared data. |
| first_indexed | 2024-03-10T01:06:09Z |
| format | Article |
| id | doaj.art-1aa9f46ff1ce4f8ea4d7e4c6009d5b90 |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-10T01:06:09Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-1aa9f46ff1ce4f8ea4d7e4c6009d5b902023-11-23T14:26:37ZengMDPI AGMachines2075-17022022-01-011014410.3390/machines10010044Research on a Measurement Method for Middle-Infrared Radiation Characteristics of AircraftXuan Deng0Yueming Wang1Guicheng Han2Tianru Xue3Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaShanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaShanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaShanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, ChinaAiming at the problem wherein temperature inversion accuracy is unstable due to the major differences in atmospheric transmittance under various observation paths, a method for measuring radiation characteristics of an aircraft engine’s hot parts and skin using a cooled middle-wave infrared camera is proposed. Based on the analysis of the aircraft’s infrared radiation characteristics, the atmospheric transmission model of any observation path was revised, the absolute radiation correction model was established, and the temperature inversion equation was calculated. Then, we used the quasi-Newton method to calculate the skin temperature and discussed uncertainty sources. After the theoretical study, an outfield test was carried out. A middle-wave infrared camera with a wavelength of 3.7–4.8 μm was applied to the actual experimental observation of the turbofan civil aviation aircraft. The ground observation distance was 15 km, and the flying height was 3 km. When implementing temperature inversion with the method presented in this paper, the surface temperature of the aircraft engine hot parts was 381 K, the correction uncertainty was ±10 K, the surface temperature of the skin was 296 K, and the correction uncertainty was ±6 K. As the experiment showed, the method in this paper can effectively implement infrared target temperature inversion and provide a reference for the quantification of infrared data.https://www.mdpi.com/2075-1702/10/1/44atmospheric transport modeluncertainty analysismiddle infraredquasi-Newton methodtemperature inversion |
| spellingShingle | Xuan Deng Yueming Wang Guicheng Han Tianru Xue Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft Machines atmospheric transport model uncertainty analysis middle infrared quasi-Newton method temperature inversion |
| title | Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft |
| title_full | Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft |
| title_fullStr | Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft |
| title_full_unstemmed | Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft |
| title_short | Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft |
| title_sort | research on a measurement method for middle infrared radiation characteristics of aircraft |
| topic | atmospheric transport model uncertainty analysis middle infrared quasi-Newton method temperature inversion |
| url | https://www.mdpi.com/2075-1702/10/1/44 |
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