| 工质变比热对不可逆Otto循环性能的影响 |
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| 引用本文： | 戈延林,陈林根,孙丰瑞. 工质变比热对不可逆Otto循环性能的影响[J]. 工程热物理学报, 2005, 26(Z1): 9-12 |
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| 作者姓名： | 戈延林 陈林根 孙丰瑞 |
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| 作者单位： | 1. 海军工程大学,动力工程系,湖北,武汉,430033
2. 海军工程大学,动力工程系,湖北,武汉,430033;海军工程大学,研究生院,湖北,武汉,430033 |
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| 基金项目： | 全国高等学校优秀博士学位论文作者专项基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 用有限时间热力学的方法分析空气标准Otto循环,由数值计算给出了存在不可逆损失和工质变比热时循环功率与压缩比、效率与压缩比以及功率和效率的特性关系,分析了工质变比热对不可逆Otto循环性能的影响特点,通过分析可知工质变比热特性对不可逆Otto循环性能有较大影响,在实际循环分析中应该予以考虑,本文所得结果对实际内燃机的设计有一定的指导意义。
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| 关 键 词： | 有限时间热力学 Otto循环 性能优化 |
| 文章编号： | 0253-231X(2005)Suppl.-0009-04 |
| 修稿时间： | 2005-01-12 |
THE EFFECTS OF VARIABLE SPECIFIC HEATS OF WORKING FLUID ON THE PERFORMANCE OF AN IRREVERSIBLE OTTO CYCLE |
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| GE Yan-Lin,CHEN Lin-gen,SUN Feng-Rui. THE EFFECTS OF VARIABLE SPECIFIC HEATS OF WORKING FLUID ON THE PERFORMANCE OF AN IRREVERSIBLE OTTO CYCLE[J]. Journal of Engineering Thermophysics, 2005, 26(Z1): 9-12 |
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| Authors: | GE Yan-Lin CHEN Lin-gen SUN Feng-Rui |
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| Abstract: | The performance of an air-standard Otto cycle with heat resistance and friction irreversible losses and variable specific heats of working fluid is analyzed by using finite-time thermodynamics. The relations between the power output and the compression ratio, between the thermal efficiency and the compression ratio, and the optimal relation between power output and the efficiency of the cycle are derived by detailed numerical examples. Moreover, the effects of variable specific heats of working fluid on the irreversible cycle performance are analyzed. The results show that the effects of variable specific heats of working fluid on the cycle performance are obvious, and it should be considered in practice cycle analysis. The results obtained in this paper may provide guidance for the design of practice internal combustion engines. |
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| Keywords: | finite-time thermodynamics Otto cycle performance optimization. |
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