Abstract
Free-piston linear generator (FPLG) engines currently gained great attention due to their capability to operate with variable fuel and compression ratio. This paper presents an experimental study on the effect of aspect ratio on the performance characteristics of the FPLG engine fueled by hydrogen. Three aspect ratios (i.e. 1.0, 1.5, and 2.0) are used to identify the engine combustion and performance parameters. The injection position is fixed in the middle of the stroke, while the equivalence ratio is kept at 1.0. The results indicate that the aspect ratio 2.0 produces the highest pressure, heat release, and shortest combustion duration. Whereas the aspect ratio 1.0 produces higher combustion efficiency and operating frequency. The piston speed decreases with the decrease in aspect ratio, which gives a negative effect on the indicated mean effective pressure and power output of the PFLG. Overall, the aspect ratio has a significant influence on engine performance characteristics.
| Original language | English |
|---|---|
| Pages (from-to) | 10506-10517 |
| Number of pages | 12 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 46 |
| Issue number | 17 |
| DOIs | |
| State | Published - 8 Mar 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2020 Hydrogen Energy Publications LLC
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Keywords
- Aspect ratio
- Free-piston engine
- Hydrogen
- Performance characteristics
- Stroke-to-bore ratio
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
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