Analyses on Working Frequency of a γ-type Free-piston Stirling Engine
- Analyses on Working Frequency of a γ-type Free-piston Stirling Engine
- 장선준; 심규호; 이윤표
- Free Piston Stirling Engine; Feedback structure; Operational Frequency; Self-excitation; Gamma type; expansion space; Displacer Piston; compression space; Power Piston; Energy Conversion
- Issue Date
- VOL 23, NO 7, 654-661
- The dynamic characteristics of a free-piston stirling engine(FPSE) with regard to the working frequency is investigated from theoretical and experimental studies. The FPSE is modeled as a two degree-of-freedom linear vibration system. A theoretical expression on the working frequency is derived from the instability condition for self-excitation based on the linear vibration model. A γ-type free-piston stirling engine is fabricated for experimental studies, and its working frequency is measured on various heater temperatures. Comparisons between the theoretical and experimental results reveal that the working frequency of the test FPSE depends on both the temperature of the compression space and the temperature difference between the expansion and compression spaces.
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