基于超临界CO_(2)布雷顿循环的飞行器热电转换系统动态仿真与瞬态特性分析  

Dynamic Simulation and Transient Analysis of Aircraft Thermoelectric Conversion System Based on Supercritical CO_(2) Brayton Cycle

作　　者：马小峰 姜培学[1] 祝银海[1] MA Xiaofeng;JIANG Peixue;ZHU Yinhai(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Beijing Key Laboratory of CO_(2)Utilization and Reduction Technology,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]热科学与动力工程教育部重点实验室,清华大学能源与动力工程系,北京100084

出　　处：《工程热物理学报》2025年第2期343-351,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学项目(No.51922060)。

摘　　要：超临界CO_(2)布雷顿循环由于性能和紧凑度的优势在高超声速飞行器上具有良好的发展前景,而空天场景的特殊热环境给循环挑战。本文建立了一套超临界CO_(2)布雷顿循环模型并进行了验证,研究了布雷顿循环系统在热负荷激增以及热负荷和冷源复合扰动两种工况下的系统性能瞬态响应情况。动态仿真的结果表明,热负荷激增和冷源不足均会引起循环热力学性能的下降,工况叠加后甚至会导致控制器失效,这对部件的设计提出了更高要求。Supercritical CO_(2) Brayton cycles,due to their advantages in performance and compactness,hold promising prospects for hypersonic vehicles.However,the unique thermal environment of the aerospace scenario poses challenges to the cycle.In this paper,a model of a supercritical CO_(2) Brayton cycle is established and validated.The study investigates the transient response of the Brayton cycle system under two operating conditions:a sudden increase in thermal load and a combined disturbance of thermal load and insufficient cold source.Dynamic simulation results indicate that both a sudden increase in thermal load and insufficient cold source can lead to a decrease in the thermodynamic performance of the cycle.Moreover,the combined disturbance may even result in controller failure,imposing higher demands on component design.

关 键 词：超临界二氧化碳 布雷顿循环 瞬态特性 空天场景 

分 类 号：TK123[动力工程及工程热物理—工程热物理]