基于通流法的燃气涡轮发动机瞬态性能仿真及实验验证

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Yuchen Dai, Manxiang Song, Donghai Jin, Xingmin Gui, Xiaoheng Liu
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引用次数: 0

摘要

目前对发动机瞬态性能的研究主要集中在特定截面关键气动参数的变化上,忽略了对发动机瞬态工作时内部流场的全面了解。为了解决这一空白,本文提出了一种二维瞬态模拟方法,可以有效地捕捉子午面流场的演变。该方法涉及在考虑角加速度源项的变角速度旋转坐标系中推导周向平均方程。发动机部件,包括压气机、燃烧室、涡轮机和旋转轴,都是单独建模的。新导出的控制方程采用双时间步进方法求解,其中内部迭代确保质量流守恒,外部迭代更新转速。以一台真实的涡轮喷气发动机为例,进行了瞬态加减速试验。实验与仿真结果对比分析表明,轴速误差平均为0.9%,发动机推力误差平均为7.8%,发动机排气温度误差平均为1.7%,压气机出口压力误差平均为5.1%。此外,该研究还分析和比较了瞬态过程中的内部流场,有助于更深入地了解发动机的动态行为。该研究为在合理的计算资源和时间框架内进行二维发动机瞬态循环综合分析建立了一种实用的方法和技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transient Performance Simulation of Gas Turbine Engine Based On Through-Flow Method and Experimental Verification
Abstract Current research on engine transient performance primarily focuses on the variation of key aerothermodynamic parameters in specific sections, neglecting the comprehensive understanding of the engine's inner flow field during transient operations. To address this gap, this paper proposes a 2D transient simulation method that effectively captures the evolution of the flow field in the meridional plane. The approach involves deriving circumferential averaging equations in a rotating coordinate system with variable angular velocity, considering angular acceleration source terms. The engine components, including the compressor, combustion chamber, turbine, and rotating shaft, are individually modeled. The newly derived governing equations are solved using a dual-time step approach, where an inner-iteration ensures mass flow conservation, and an outer-iteration updates the rotational speed. Using a real turbojet engine as a case study, transient examinations comprising acceleration and deceleration are performed. A comparative analysis of experimental and simulation results is conducted, revealing an average error of 0.9% in shaft speed, 7.8% in engine thrust, 1.7% in engine exhaust temperature, and 5.1% in compressor outlet pressure. Additionally, the study analyzes and compares the internal flow fields during the transient process, contributing to a deeper understanding of the engine's dynamic behavior. The research effort establishes a practical methodology and technology for conducting comprehensive two-dimensional engine transient cycle analyses within reasonable computational resources and timeframes.
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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