Analysis of turbine blade cooling effect on recuperative gas turbines cycles performance

Salpingidou, Christina; Tsakmakidou, Dimitra; Vlahostergios, Zinon; Misirlis, Dimitrios; Flouros, Michael; Yakinthos, K.

doi:10.1016/j.energy.2018.08.204

Cited by 13 publications

(7 citation statements)

References 7 publications

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“…É bem difundido ainda, que para se aumentar a eficiência do equipamento deve-se aumentar a temperatura de entrada da turbina (SALPINGIDOU et al, 2018;SCIUBBA, 2015). E quanto maior está temperatura maior será a potência útil fornecida pela turbina a gás.…”

Section: Resultsunclassified

Aspectos Relacionados À Alimentação De Educandos Da Eja Dentro E Fora Da Escola Emef “Prof. Pedro Simão”, Em Alegre, Espírito Santo

Martins¹,

Alves²,

Silva³

et al. 2019

SODEBRAS

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projeto de extensão com decorrências no contexto contemporâneo de consumo. Para isso, foi realizada uma análise por meio das confluências entre a literatura e o arsenal documental do projeto para sua caracterização extensionistas. Observou-se, a partir da pesquisa, que o Clube de Trocas tem possibilitado a ressignificação do consumo e a mitigação de suas consequências, pautando assim a construção de uma nova epistemologia benéfica e solidária. Além disso, o mesmo tem se apresentado como um espaço potencial para a formação coletiva que propicia a experimentação e a vivência de outra dinâmica de consumo, direta, critica e socializadora.

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Section: Resultsunclassified

Aspectos Relacionados À Alimentação De Educandos Da Eja Dentro E Fora Da Escola Emef “Prof. Pedro Simão”, Em Alegre, Espírito Santo

Martins¹,

Alves²,

Silva³

et al. 2019

SODEBRAS

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“…Aero-engines pursue extreme performance in extremely limited space and under extreme conditions (high temperature, high pressure, and high stress) to ensure long-term stability (Lukin et al, 1993;Xiao and Huang, 2016;Williams, 2017;Salpingidou et al, 2018). The performance requirements for aero-engines in the aerospace field are becoming increasingly rigorous, including Graphical Abstract | Alumina ceramic fabricated through 3D printing.…”

Section: Introductionmentioning

confidence: 99%

Thermal Treatment of γ-Al2O3 for the Preparation of Stereolithography 3D Printing Ceramic Slurries

Zeng

Liang

2019

Front. Mater.

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Alumina (Al 2 O 3 ) suspensions were prepared for the effective application in the stereolithography three-dimensional (3D) printing process. Thermal treatment of γ-Al 2 O 3 could optimize the ceramic slurries to meet the requirements of stereolithography 3D printing technique. In this study, alumina powders were modified by thermal treatment at different temperatures for the preparation of well-dispersed ceramic slurries. The influence of thermal treatment on the raw powder, printed green bodies, and sintered alumina parts was systematically studied. Thermogravimetric analysis indicated that the decomposition temperature of photosensitive resin was between 390 and 460 • C. The alumina powders became denser, the crystal grains changed from round sphere-shaped to long cylinder-shaped, and the pores disappeared with increasing thermal treatment temperature. After the 3D printing process, the microstructure of green bodies and sintered alumina ceramics exhibited significant variation. Decomposition and removal of photosensitive resin led to higher water absorption, higher porosity, and lower bulk density of alumina ceramics compared to the printed green bodies. The scattering phenomenon in ceramic slurries and layer-by-layer forming characteristic determined the different shrinkage in three directions. Experimental results suggested that 1,500 • C was considered as the optimal thermal treatment temperature, with the water absorption of 107%, open porosity of 91%, and bulk density of 0.67 g cm −3 . The higher thermal treatment temperatures would lead to clump and agglomerate of alumina powders.

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“…In order to increase aero engine thermal efficiency, manufacturers have historically increased the turbine entry temperatures (TET), overall pressure ratios (OPR) and component efficiencies of high bypass ratio turbofans [6,7]. Theoretically this allows the cycle to operate at higher overall efficiency, but the potential for higher thermal efficiency from increasing TET is reaching its apogee, as TET is limited by cooling requirements and the material operating temperatures of the high pressure (HP) turbine.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of nutating disc engine topping cycles for aero-engine applications

Sebastiampillai

Rolt

Jacob

et al. 2019

Energy

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Within the next thirty years the evolutionary approach to aero engine development will struggle to keep abreast with increasingly stringent environmental targets. Therefore radical approaches to aeroengine development in terms of energy savings need to be considered. One particular concept involves the inclusion of a pressure-rise combustion system, within the architecture of an aero-engine, to provide additional shaft power. The nutating disc engine concept is a strong contender due to its power density. The feasibility of the nutating disc engine has been previously investigated for unmanned vehicle applications. However, this paper investigates the performance benefits of incorporating a nutating disc core in a larger geared open rotor engine for a potential entry in to service in 2050. In addition, a methodology is presented to estimate the size and weight of the nutating disc core. This methodology is pivotal in determining the overall performance of the novel aero-engine cycle. The outcome of this study predicts a potential 9.4% fuel burn benefit, over a state of the art geared open rotor in the year 2050. In addition, the sensitivity of the nutating disc design variables was explored. This showcases a pessimistic design and an optimistic design, showing the range of possible fuel burn benefits compared to a comparable year-2000 aircraft mission. Highlights • The nutating disc engine, is a power-dense internal combustion engine that claims high thermal efficiency. • This study investigates the benefit derived from integrating a Dual-cycle (Otto and Diesel) within a Brayton cycle. • A methodology to predict the size and weight of the nutating disc engine is presented. This is essential to determine aircraft mission level fuel burn benefits/penalties • When the nutating disc engine is integrated into the architecture of a year 2050 geared open rotor and aircraft, the potential fuel-burn benefit is 9.4% relative to a year 2050 baseline aircraft.

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Analysis of turbine blade cooling effect on recuperative gas turbines cycles performance

Cited by 13 publications

References 7 publications

Aspectos Relacionados À Alimentação De Educandos Da Eja Dentro E Fora Da Escola Emef “Prof. Pedro Simão”, Em Alegre, Espírito Santo

Aspectos Relacionados À Alimentação De Educandos Da Eja Dentro E Fora Da Escola Emef “Prof. Pedro Simão”, Em Alegre, Espírito Santo

Thermal Treatment of γ-Al2O3 for the Preparation of Stereolithography 3D Printing Ceramic Slurries

Thermodynamic analysis of nutating disc engine topping cycles for aero-engine applications

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