Parametric analysis on the critical oscillation point of a free piston Stirling engine with a nonlinear load

Chen, Pengfan; Zhi, Changshuang; Ding, Wenhao; Chen, Zhu; Liu, Yingwen

doi:10.1080/15435075.2022.2075229

Cited by 3 publications

(2 citation statements)

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“…They found that the nonlinearity of the piston's amplitude was more evident than that of the displacer's amplitude. In addition, the operating frequency first increased rapidly and then increased slowly as the charged pressure, hot‐end temperature, and piston spring stiffness increased 32 …”

Section: Introductionmentioning

confidence: 99%

“…In addition, the operating frequency first increased rapidly and then increased slowly as the charged pressure, hot-end temperature, and piston spring stiffness increased. 32 As shown in the literature above, many methods have been developed and applied by several researchers to study thermodynamic-dynamic analyses and validate models through experiments, including nonlinear dynamic modeling, key parameter prediction, and performance improvement. In addition, the relationships between key parameters and the operating frequency, pistons amplitudes, and output power of the FPSEs have been determined.…”

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confidence: 99%

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Influences of nonlinear parameters on the performance of a free‐piston Stirling engine

Ye,

Wang,

Yan

et al. 2023

Energy Science & Engineering

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This study presents a thermodynamic–dynamic model of a free‐piston Stirling engine (FPSE) with nonlinear coefficients of spring, load damping, and pressure for working spaces. The effects of the nonlinear coefficients of hardening and softening springs on the movement and operating frequency of a displacer and piston are investigated. Subsequently, the influences of the nonlinear pressure terms of the working space and buffer spaces, as well as the nonlinear coefficients of the load on the amplitudes of the two pistons, frequency, and output powers are discussed. The results indicate that the low nonlinear coefficients of the spring have a minor effect on the amplitudes and frequency. As the high nonlinear coefficients of the hardening spring increase, the amplitudes and output power decrease, while the frequency increases. As the nonlinear terms of the softening spring increase, the amplitudes and output power reach maximum values, but the frequency is reduced by 3.55%. The effects of the nonlinear pressure terms on the amplitudes and output power are not evident. However, an increase in the nonlinear load leads to a significant decrease in the FPSE's performance.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%