The Hybrid Concept of Turboshaft Engine Enhanced by Steam Cycle Using Waste Heat Recovery—Combined Analytical and Numerical Calculation of Its Efficiency

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-06-04 DOI:10.4271/03-17-06-0045

P. Tarnawski, W. Ostapski

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Abstract

The article presents a hybrid concept of a turboshaft engine that fits into the area of PGE (pressure-gained combustion). It combines the advantages and elements of a piston engine and a turbine engine. The combustion takes place in isochoric chambers. The proposed timing system of the engine efficiently realizes the Humphrey cycle. Additionally, the main gas cycle engine was enhanced by the Clausius–Rankine steam cycle to achieve effective power of engine equal to 1231.3 kW. It was supplied by waste heat recovery from the exhaust gas. The enhancement of the engine by the secondary steam cycle significantly improved engine effective efficiency with a final value reaching 0.446. The effective efficiency and specific fuel consumption of the engine were calculated using merged analytical–numerical CFD (computational fluid dynamics) analysis. The centrifugal compressor, gas turbine, and steam turbine can work on the common shaft whose rotational velocity is 35,000 rpm. Because of additional weight, it could have potential applications for stationary use or heavy military units.

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利用余热回收蒸汽循环增强涡轮轴发动机的混合概念--对其效率的综合分析和数值计算

文章介绍了一种涡轮轴发动机的混合概念，它与 PGE（压力增益燃烧）领域相吻合。它结合了活塞发动机和涡轮发动机的优点和要素。燃烧在等压腔内进行。拟议的发动机定时系统有效地实现了汉弗莱循环。此外，主燃气循环发动机通过克劳修斯-郎肯蒸汽循环得到了增强，使发动机的有效功率达到了 1231.3 千瓦。功率由废气余热回收提供。通过二次蒸汽循环对发动机进行改进，大大提高了发动机的有效效率，最终效率值达到 0.446。发动机的有效效率和特定燃料消耗是通过合并分析和数值 CFD（计算流体动力学）分析计算得出的。离心压缩机、燃气轮机和蒸汽轮机可在转速为 35000 rpm 的共轴上工作。由于重量增加，它有可能应用于固定用途或重型军事单位。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.