Flow Characteristics and Loss Models of the Transonic Radial Turbine
A hydrogen turbo hybrid power system has the significant advantages of zero carbon emissions, high efficiency and high reliability. The need to increase the power density of hydrogen turbo hybrid power systems and improve the adaptability of turbines over a wide range of expansion ratios has encoura...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/5/2453 |
| _version_ | 1827651938919907328 |
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| author | Cheng Zhu Weilin Zhuge Yangjun Zhang |
| author_facet | Cheng Zhu Weilin Zhuge Yangjun Zhang |
| author_sort | Cheng Zhu |
| collection | DOAJ |
| description | A hydrogen turbo hybrid power system has the significant advantages of zero carbon emissions, high efficiency and high reliability. The need to increase the power density of hydrogen turbo hybrid power systems and improve the adaptability of turbines over a wide range of expansion ratios has encouraged the study of transonic turbines. This paper is aimed at analyzing the flow characteristics and developing the loss models of a transonic turbine. The main losses for a subsonic radial turbine are usually divided into four parts: incidence loss, passage loss, tip clearance loss and trailing edge loss. Nevertheless, when the expansion ratio of a turbine is greater than about 2.6, the turbine will choke and work in transonic conditions. A shock wave will occur at the trailing edge, which will cause a lot of losses. The loss caused by the shock wave at the trailing edge is ignored by previous loss models. This paper develops a shock wave-induced loss model to predict the performance in transonic conditions more accurately. With the developed shock wave-induced loss model, the predicted efficiency deviation in transonic conditions decreases from 10% to 3.5% maximally. |
| first_indexed | 2024-03-09T20:47:34Z |
| format | Article |
| id | doaj.art-50bdf9990279416696bdacf915e440c0 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T20:47:34Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-50bdf9990279416696bdacf915e440c02023-11-23T22:41:04ZengMDPI AGApplied Sciences2076-34172022-02-01125245310.3390/app12052453Flow Characteristics and Loss Models of the Transonic Radial TurbineCheng Zhu0Weilin Zhuge1Yangjun Zhang2State Key Laboratory of Automotive Safety and Energy, School of Vehicle and Mobility, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, School of Vehicle and Mobility, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Automotive Safety and Energy, School of Vehicle and Mobility, Tsinghua University, Beijing 100084, ChinaA hydrogen turbo hybrid power system has the significant advantages of zero carbon emissions, high efficiency and high reliability. The need to increase the power density of hydrogen turbo hybrid power systems and improve the adaptability of turbines over a wide range of expansion ratios has encouraged the study of transonic turbines. This paper is aimed at analyzing the flow characteristics and developing the loss models of a transonic turbine. The main losses for a subsonic radial turbine are usually divided into four parts: incidence loss, passage loss, tip clearance loss and trailing edge loss. Nevertheless, when the expansion ratio of a turbine is greater than about 2.6, the turbine will choke and work in transonic conditions. A shock wave will occur at the trailing edge, which will cause a lot of losses. The loss caused by the shock wave at the trailing edge is ignored by previous loss models. This paper develops a shock wave-induced loss model to predict the performance in transonic conditions more accurately. With the developed shock wave-induced loss model, the predicted efficiency deviation in transonic conditions decreases from 10% to 3.5% maximally.https://www.mdpi.com/2076-3417/12/5/2453hydrogen turbo hybrid power systemtransonic turbineloss modelshock wave |
| spellingShingle | Cheng Zhu Weilin Zhuge Yangjun Zhang Flow Characteristics and Loss Models of the Transonic Radial Turbine Applied Sciences hydrogen turbo hybrid power system transonic turbine loss model shock wave |
| title | Flow Characteristics and Loss Models of the Transonic Radial Turbine |
| title_full | Flow Characteristics and Loss Models of the Transonic Radial Turbine |
| title_fullStr | Flow Characteristics and Loss Models of the Transonic Radial Turbine |
| title_full_unstemmed | Flow Characteristics and Loss Models of the Transonic Radial Turbine |
| title_short | Flow Characteristics and Loss Models of the Transonic Radial Turbine |
| title_sort | flow characteristics and loss models of the transonic radial turbine |
| topic | hydrogen turbo hybrid power system transonic turbine loss model shock wave |
| url | https://www.mdpi.com/2076-3417/12/5/2453 |
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