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基于超临界二氧化碳梳齿密封泄漏实验对现有计算模型评价
Evaluation of Existing Models Based on Experiments of Supercritical Carbon Dioxide Flows through Labyrinth Seal

DOI: 10.12677/NST.2020.84023, PP. 193-202

Keywords: 超临界二氧化碳，布雷顿循环，梳齿密封，模型评估
Supercritical Carbon Dioxide, Brayton Power Cycle, Labyrinth Seal, Models Evaluation

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Abstract:

超临界二氧化碳布雷顿循环系统凭借着效率高、结构紧凑等特点引起了全世界的关注。梳齿式密封作为循环系统旋转机械中非接触式密封形式之一，密封性能决定着系统的循环效率和系统安全性。为了研究超临界二氧化碳系统直通式梳齿密封结构泄漏特性，基于高压条件下梳齿密封结构27组实验数据，评价了2种迭代式计算模型以及2种快速计算模型的预测能力，给出了不同结构参数及热力学参数条件下的适用范围。
The supercritical carbon dioxide Brayton power cycle system has attracted worldwide attention due to its high efficiency and compact structure. Labyrinth seal is one of the non-contact sealing forms in the rotating machine of the cycle system. The sealing performance determines the efficiency and safety of the system. In order to study the leakage characteristics of the labyrinth seal structure in the supercritical carbon dioxide system, the prediction capabilities of two iterative calculation models and two fast calculation models are evaluated, based on 27 groups of experimental data of the labyrinth seal structure. The applicable scope under different structural parameters and thermodynamic parameters are shown.

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