Advanced exergy analysis of the turbojet engine main components considering mexogenous, endogenous, exegenous, avoidable and unavoidable exergy destructions

IF 5.4 2区工程技术 Q1 ENGINEERING, AEROSPACE Propulsion and Power Research Pub Date : 2022-09-01 DOI:10.1016/j.jppr.2022.07.002

Hakan Caliskan , Selcuk Ekici , Yasin Sohret

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引用次数: 4

Abstract

In this study, exergy dynamic and advanced exergy analyses are applied to the turbojet engine to assess its mexogenous, endogenous, exogenous, avoidable and unavoidable exergies under the environment conditions of 15 °C temperature and 1 bar pressure. The maximum exergy point in the turbojet engine is found for the combustor in which C₁₁H₂₃ (Jet-A1) fuel is combusted with air, while the minimum one is determined for the air compressor head where the free air enters. The combustion chamber has the maximum fuel, product and irreversibility rates and the air compressor has the minimum fuel and product exergy values, while the minimum irreversibility is found for the turbine. Maximum improvement potential rate is found for the combustion chamber (5141.27 kW), while minimum rate is determined for the turbine of system (6.95 kW). Also, the turbine component has the highest exergy efficiency (97.20%) due to its expansion process, while combustion chamber component has the lowest exergy efficiency (55.39%) due to low efficient combustion process of the fuel. Furthermore, the mexogenous exergy destructions from maximum to minimum are found for the combustion chamber, air compressor and gas turbine units, respectively. Considering exergy dynamic analysis, the mexogenous exergy destruction rates of the combustion chamber, air compressor and gas turbine are found as 184.4 kW, 103.97 kW and 9.99 kW, respectively. Considering all results, the combustion chamber is the primer component to be handled for better efficiency and improvement.

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考虑内、内、外、可避免和不可避免火用破坏的涡喷发动机主要部件高级火用分析

本研究将火用动态分析和先进的火用分析应用于涡轮喷气发动机，评估其在15°C温度和1bar压力的环境条件下的外源性、内源性、外源性、可避免和不可避免的火用。涡轮喷气发动机的最大火用点是在C11H23 (Jet-A1)燃料与空气燃烧的燃烧室，而最小火用点是在自由空气进入的空压机头。燃烧室具有最大的燃料、产品和不可逆性速率，空压机具有最小的燃料和产品火用值，而涡轮机具有最小的不可逆性。最大改进潜力率为燃烧室(5141.27 kW)，最小改进潜力率为系统涡轮(6.95 kW)。涡轮部件由于膨胀过程的原因，其火用效率最高(97.20%)，而燃烧室部件由于燃料的低燃烧过程，其火用效率最低(55.39%)。此外，燃烧室、空压机和燃气轮机机组的含氧火用破坏从最大到最小。结合火用动态分析，得到燃烧室、空压机和燃气轮机的自生火用破坏率分别为184.4 kW、103.97 kW和9.99 kW。考虑到所有结果，为了提高效率和改进，燃烧室是需要处理的底火部件。

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来源期刊

Propulsion and Power Research Multiple-

CiteScore

7.50

自引率

5.70%

发文量

期刊介绍： Propulsion and Power Research is a peer reviewed scientific journal in English established in 2012. The Journals publishes high quality original research articles and general reviews in fundamental research aspects of aeronautics/astronautics propulsion and power engineering, including, but not limited to, system, fluid mechanics, heat transfer, combustion, vibration and acoustics, solid mechanics and dynamics, control and so on. The journal serves as a platform for academic exchange by experts, scholars and researchers in these fields.