联合焦耳-汉弗莱-回热器循环:对更有效的航空运输的性能和参数分析评价

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Jorge Saavedra, Luis Cadarso
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引用次数: 0

摘要

摘要提出了一种三流联合焦耳-汉弗莱循环,采用热回收流作为回热器。基于自行开发的热力学性能工具,对改进后的双轴涡扇发动机进行了运行分析。通过增加中间冷却器和再加热室来改进发动机核心,以接近等温压缩和膨胀过程。一次流的一部分被引入使用旋转爆轰燃烧(RDC)技术的再热室。然后,RDC的流出与其余的核电流合并,然后排放到下一个涡轮级。整个系统的行为是通过一个非线性数学模型来捕获的,该模型具有八个决策变量,包括质量流量和压缩比。参数分析确定了所提出的发动机概念的操作和性能包络。最后,赋予模型一个目标函数,该目标函数包括全局效率和推力,以寻找一个提高热力学性能的运行状态。采用基于广义降阶梯度的算法求解非线性模型,每次迭代求解一个线性约束子问题,生成一个搜索方向。这里介绍的性能和操作范围可以作为其他人考虑实施任何所讨论的焦耳循环修改或评估其使用的成本效益平衡的指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Combined Joule-Humphrey-recuperator Cycle: Performance and Parametric Analysis Evaluation Towards More Efficient Air Transportation
Abstract A three-stream combined Joule-Humphrey cycle that employs a heat recovery stream to function as a recuperator is presented. Based on an in-house developed thermodynamic performance tool, the operation of a modified dual-shaft turbofan engine is proposed. The engine core is modified by adding an intercooler and a reheating chamber to approach isothermal compression and expansion processes. A fraction of the primary flow is introduced into a reheat chamber that uses rotating detonation combustion (RDC) technology. The outflow of the RDC is then merged with the rest of the nucleus current before being discharged to the next turbine stage. The overall system behavior is captured by means of a nonlinear mathematical model featuring eight decision variables, including mass flow rates and compression ratios. A parametric analysis identifies the operational and performance envelope of the proposed engine concept. Ultimately, the model is endowed with an objective function, which includes global efficiency and thrust looking for an operation regime that boosts the thermodynamic performance. A generalized reduced gradient based algorithm is used to solve the nonlinear model, where each iteration solves a linearly constrained subproblem to generate a search direction. The performance and operational envelope presented here could be used as guidance for others considering the implementation of any of the discussed Joule cycle modifications or assessing the cost-effective balance of their use.
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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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