• CN:11-2187/TH
  • ISSN:0577-6686

›› 2002, Vol. 38 ›› Issue (2): 86-89.

• 论文 • 上一篇    下一篇

恒温热源实际布雷顿循环的功率密度优化

陈林要;郑军林;孙丰瑞   

  1. 海军工程大学306教研室
  • 发布日期:2002-02-15

POWER DENSITY OPTIMIZATION OF A REAL BRAYTON CYCLE WITH CONSTANT-TEMPERATURE HEAT RESERVOIRS

Chen Lingen;Zheng Junlin;Sun Fengrui   

  1. Naval University of Engineering
  • Published:2002-02-15

摘要: 计入工质与高、低温侧换热器的热阻损失及压气机和涡轮机中的不可逆压缩和膨胀损失,用有限时间势力学方法导出了恒温热源条件下实际不可逆布雷顿特环功率密度与压比间的解析式,借助于数值计算研究了高、低温侧换热器的最优热导率分配对最大功率密度的影响。

关键词: 不可逆循环, 布雷顿循环, 功率密度, 有限时间势力学, 轮轨噪声 瞬态滚动 钢轨波磨 声功率

Abstract: The analytical formulas about the relations between power density and pressure ratio of an irreversible Brayton cycle coupled to constant-temperature heat reservoirs are derived using finite-time thermodynamics in this paper. In the analysis, the irreversibilities involve the heat resistance losses in the hot- and cold-side heat exchangers, and the irreversible compression and expansion losses in the compressor and turbine. The influences of the thermal conductance distribution of hot- and cold-side heat exchangers on the optimal performance of the cycle are studied by detailed numerical examples.

Key words: Brayton cycle, Finite-time thermodynamics, Irreversible cycle, Power density, Subway wheel/rail noise transient rolling rail corrugation sound power

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