Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography
Oil-free Roots blower is a type of Positive Displacement Machine used for low pressure ratio applications. Its volumetric efficiency is dependent on the leakage of compressed gas through the clearance gaps. In the absence of internal cooling, prediction of temperature distribution and conjugate heat...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202722000970 |
| _version_ | 1811315620123246592 |
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| author | Mario Matuzović Sham Rane Brijeshkumar Patel Ahmed Kovačević Željko Tuković |
| author_facet | Mario Matuzović Sham Rane Brijeshkumar Patel Ahmed Kovačević Željko Tuković |
| author_sort | Mario Matuzović |
| collection | DOAJ |
| description | Oil-free Roots blower is a type of Positive Displacement Machine used for low pressure ratio applications. Its volumetric efficiency is dependent on the leakage of compressed gas through the clearance gaps. In the absence of internal cooling, prediction of temperature distribution and conjugate heat transfer becomes important for reliable design and operation. The interaction of gas flow and structural deformation in the blower is highly transient and one of the most challenging problems which need to be addressed for accurate performance prediction. To achieve this, the technique which includes moving and transforming the mesh is employed. The performance test data used for validation included discharge air temperature, mass flow rate, pressure, and power. The comparison between numerical and experimental results has shown good agreement of 7.5% on flow, 4.3% on power while the discharge temperature deviation was within 4°C. High speed infrared thermography of the rotor lobe and housing surface temperatures was used to evaluate the accuracy of the Conjugate Heat Transfer model. The difference between the experiment and simulation was within 6°C. The aim of this study was to develop and validate the numerical model for analysis of heat transfer between pressurized air and compressor elements and to provide temperature distribution in structural elements. By this means, the operational gap sizes can be reliably minimised during the design of a machine. |
| first_indexed | 2024-04-13T11:33:27Z |
| format | Article |
| id | doaj.art-d788f8f2996241e28dfe866cf3b5dd3f |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-04-13T11:33:27Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-d788f8f2996241e28dfe866cf3b5dd3f2022-12-22T02:48:31ZengElsevierInternational Journal of Thermofluids2666-20272022-11-0116100234Analysis of conjugate heat transfer in a roots blower and validation with infrared thermographyMario Matuzović0Sham Rane1Brijeshkumar Patel2Ahmed Kovačević3Željko Tuković4Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, CroatiaCity, University of London, London, United Kingdom; Corresponding author at: SST, City University of London, 10 Northampton Square, London, EC1V 0HB, United Kingdom.City, University of London, London, United KingdomCity, University of London, London, United KingdomFaculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, CroatiaOil-free Roots blower is a type of Positive Displacement Machine used for low pressure ratio applications. Its volumetric efficiency is dependent on the leakage of compressed gas through the clearance gaps. In the absence of internal cooling, prediction of temperature distribution and conjugate heat transfer becomes important for reliable design and operation. The interaction of gas flow and structural deformation in the blower is highly transient and one of the most challenging problems which need to be addressed for accurate performance prediction. To achieve this, the technique which includes moving and transforming the mesh is employed. The performance test data used for validation included discharge air temperature, mass flow rate, pressure, and power. The comparison between numerical and experimental results has shown good agreement of 7.5% on flow, 4.3% on power while the discharge temperature deviation was within 4°C. High speed infrared thermography of the rotor lobe and housing surface temperatures was used to evaluate the accuracy of the Conjugate Heat Transfer model. The difference between the experiment and simulation was within 6°C. The aim of this study was to develop and validate the numerical model for analysis of heat transfer between pressurized air and compressor elements and to provide temperature distribution in structural elements. By this means, the operational gap sizes can be reliably minimised during the design of a machine.http://www.sciencedirect.com/science/article/pii/S2666202722000970Conjugate heat transferRoots blowerInfrared thermographyComputational fluid dynamics |
| spellingShingle | Mario Matuzović Sham Rane Brijeshkumar Patel Ahmed Kovačević Željko Tuković Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography International Journal of Thermofluids Conjugate heat transfer Roots blower Infrared thermography Computational fluid dynamics |
| title | Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography |
| title_full | Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography |
| title_fullStr | Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography |
| title_full_unstemmed | Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography |
| title_short | Analysis of conjugate heat transfer in a roots blower and validation with infrared thermography |
| title_sort | analysis of conjugate heat transfer in a roots blower and validation with infrared thermography |
| topic | Conjugate heat transfer Roots blower Infrared thermography Computational fluid dynamics |
| url | http://www.sciencedirect.com/science/article/pii/S2666202722000970 |
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