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首页> 外文期刊>International journal of green energy >Dynamic simulation and performance prediction of free displacer Stirling engines
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Dynamic simulation and performance prediction of free displacer Stirling engines

机译：自由置换器斯特林发动机的动态仿真与性能预测

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In this study, a Stirling engine with a free-displacer and a kinematically controlled power piston was proposed and analyzed from thermodynamic and dynamic points of view. The analysis intended to reveal the dynamic behaviors of moving components of the engine as well as predicting global thermal performance of it. A dynamic-thermodynamic mathematical model of the engine involving the isothermal gas pressure equation and motion equations of the displacer, power piston and crankshaft was developed. For the solution of the dynamic-thermodynamic model equations, and simulation of the engine's running, a computer program was prepared in FORTRAN language. By considering a hot-end temperature of 1,000 K and a cold-end temperature of 350 K, dimensions of mechanic, volumetric and thermal components of the engine were quantified interactively. Variations of engine speed, engine power, displacer stroke, and engine torque were examined with respect to the spring constant, displacer mass, displacer damping constant and external load and, results were graphically presented. In comparison with engines having free-piston and kinematically driven displacer, the thermodynamic performance of the free-displacer engine was found to be lower. The engine was found to be able to work at constant speed and power. The values of the displacer mass and spring constant were optimized as 1,500 g and 1,30,000 N/s, respectively and the global speed of the engine was determined to be 47.75 Hz for these values. The effective and the indicated work of the engine were determined to be 113 and 126 J, respectively.
机译：在本研究中，提出了一种具有自由置换器和运动运动活塞的斯特林发动机，并从热力学和动态的观点分析。分析旨在揭示发动机的移动部件的动态行为以及预测其的全局热性能。开发了一种动态 - 热力学数学模型，涉及置换器，动力活塞和曲轴的等温气体压力方程和运动方程的发动机。对于动态热力学模型方程的解决方案和发动机运行的仿真，在Fortran语言中准备了一种计算机程序。通过考虑1,000 k的热端温度和350 k的冷端温度，交互式地量化发动机的机械，体积和热部件的尺寸。相对于弹簧常数，置换器质量，置换器阻尼恒定和外部负载，检查发动机速度，发动机电力，置换器行程和发动机扭矩的变化，并在图形上呈现。与具有自由活塞和运动运动驱动的置换器的发动机相比，发现自由置换器发动机的热力学性能降低。发现发动机能够以恒定的速度和功率工作。置换器质量和弹簧常数的值分别优化为1,500克和1,30,000n / s，并确定发动机的全局速度为47.75Hz。发动机的有效和所示的工作分别确定为113和126J。

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