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

被引：3

作者：

Ye, Wenlian ^{[1
,3
]}

Wang, Weijie ^{[1
]}

Yan, Yuqin ^{[1
]}

Kong, Lingxuan ^{[1
]}

Liu, Yingwen ^{[2
]}

机构：

[1] Lanzhou Univ Technol, Coll Energy & Power Engn, Key Lab Fluid Machinery & Syst, Lanzhou, Gansu, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermo Fluid Sci & Engn MOE, Xian, Shaanxi, Peoples R China

[3] Lanzhou Univ Technol, Coll Energy & Power Engn, Key Lab Fluid Machinery & Syst, Lanzhou 730000, Gansu, Peoples R China

来源：

ENERGY SCIENCE & ENGINEERING | 2023年 / 11卷 / 11期

基金：

中国国家自然科学基金;

关键词：

free-piston Stirling engine; nonlinear coefficients; nonlinear model; performance analysis; OPTIMIZATION; DESIGN;

D O I：

10.1002/ese3.1577

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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. 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 results show that as the high nonlinear coefficients of the hardening spring increase, the amplitude 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 decreased. An increase in the nonlinear load led to a significant decrease in the FPSE's performance.image

引用

页码：4019 / 4038

页数：20

共 34 条

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