Design and development of a direct injection system for cryogenic engines
| Autor: | Angela Mutumba, Dongsheng Wen, Henry Clarke, Kevin Cheeseman |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Flow (psychology) Process (computing) General Physics and Astronomy Liquid phase 02 engineering and technology Liquid nitrogen 01 natural sciences Automotive engineering Valve actuator Cycle time 020303 mechanical engineering & transports 0203 mechanical engineering 0103 physical sciences Valve lift General Materials Science 010306 general physics business Thermal energy |
| Zdroj: | Cryogenics. 91:77-86 |
| ISSN: | 0011-2275 |
| DOI: | 10.1016/j.cryogenics.2017.12.009 |
| Popis: | The cryogenic engine has received increasing attention due to its promising potential as a zero-emission engine. In this study, a new robust liquid nitrogen injection system was commissioned and set up to perform high-pressure injections into an open vessel. The system is used for quasi-steady flow tests used for the characterisation of the direct injection process for cryogenic engines. An electro-hydraulic valve actuator provides intricate control of the valve lift, with a minimum cycle time of 3 ms and a frequency of up to 20 Hz. With additional sub-cooling, liquid phase injections from 14 to 94 bar were achieved. Results showed an increase in the injected mass with the increase in pressure, and decrease in temperature. The injected mass was also observed to increases linearly with the valve lift. Better control of the injection process, minimises the number of variables, providing more comparable and repeatable sets of data. Implications of the results on the engine performance were also discussed. |
| Databáze: | OpenAIRE |
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