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地面Brayton循环系统具备高效、紧凑的特点,经过优化后,可适用于空间反应堆。该文利用Fortran语言对空间Brayton循环进行数学建模,以循环工质为基础对系统进行改进,对氦氙混合工质下闭式Brayton循环进行热力学分析,讨论混合工质成分变化对Brayton循环的综合影响。研究结果表明:加入氙气降低了Brayton循环热力学性能,循环效率和比功均有降低;但氙气的加入有效降低压气机膨胀功,改善循环气动性能。氦气与氙气在热力性能与气动性能中表现互补,纯氦工质中加入适量氙气可使Brayton循环系统减少压气机、换热器数量,从而具备空间应用的潜力。
The ground-based Brayton circulation system is highly efficient and compact, and is optimized for use in space reactors. In this paper, Fortran language was used to mathematically model the space Brayton cycle. Based on the cyclic working fluid, the system was improved. The thermodynamic analysis was performed on the closed Brayton cycle under the mixed working medium of He-Xenon. The effects of the composition of the mixed working medium on the Brayton cycle Comprehensive effect. The results showed that the addition of xenon reduced the thermodynamic performance of Brayton cycle, and the cycle efficiency and specific power decreased. However, the addition of xenon effectively reduced the expansion work and improved the cyclic aerodynamic performance. Helium and xenon complement each other in terms of thermal and aerodynamic properties. Adding pure xenon to pure helium allows the Brayton system to reduce the number of compressors and heat exchangers, which has the potential for space applications.