CFD Application for Gas Turbine Combustion Simulations

Vilag, Valeriu; Vilag, Jeni; Carlanescu, Razvan; Mangra, Andreea; Florean, Florin

doi:10.5772/intechopen.89759

Cited by 10 publications

(10 citation statements)

References 9 publications

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“…The generation of the combustors mesh was one of the most important steps in modelling the combustion and flow in the combustors. From an accuracy point of view, tetrahedral elements are often used to create meshes of gas microturbine simulations [26][27][28][29][30]. This kind of mesh element is known to be able to fill complex structures while keeping acceptable quality parameter values (skewness, orthogonality, and aspect ratio).…”

Section: Computational Domainmentioning

confidence: 99%

Computational Fluid Dynamics (CFD) Assessment of the Internal Flue Gases Recirculation (IFGR) Applied to Gas Microturbine in the Context of More Hydrogen-Enriched Fuel Use

Fąfara,

Modliński

2023

Energies

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Renewable energy is a promising substitute for fossil fuels when corelated with P2G technology. To optimise P2G efficiency, there is a need to increase hydrogen fraction in the fuel stream. Simultaneously gas microturbines are widely applied in many industry sectors. These devices are often equipped with diffusion combustors. This situation was investigated in this paper. The P2G and gas microturbines may be integrated together in the future leading to the application of hydrogen-enriched fuel. Hydrogen-enriched fuel causes increase in combustion temperature and velocity. In a nonadapted combustor, these phenomena could result in an increase of NOx emissions and risk of material overheating and failure. In order to adapt the combustors for hydrogen-enriched fuel, the concept of autonomous internal flue gases recirculation (IFGR) system was applied to this issue. In this paper, the IFGR system applied to gas microturbine was studied in terms of hydrogen-enriched fuel application. The obtained exhaust gases recirculation ratios were too low to affect the combustion process as it was expected. The observed combustion modifications in the combustor were hardly linked to the air flow modification in the liner, due to IFGR system implementation. After CFD studies, the proposed IFGR system does not seem to provide the expected effects.

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Section: Computational Domainmentioning

confidence: 99%

Computational Fluid Dynamics (CFD) Assessment of the Internal Flue Gases Recirculation (IFGR) Applied to Gas Microturbine in the Context of More Hydrogen-Enriched Fuel Use

Fąfara,

Modliński

2023

Energies

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“…To resolve the major flow properties, the tetrahedral cell system is often created. It was previously proven that this meshing solution is successful in case of gas microturbines combustors [3][4][5][6][7]. This kind of element permits to fill a complex geometry, while keeping correct values of quality parameters (skewness, orthogonality and aspect ratio).…”

Section: Computational Domain Grid Systemmentioning

confidence: 99%

“…In the work [6] a flow with combustion processes occurring in gas turbine was investigated. The numerical results were compared with experimental results, and many of the performed simulations were accurate.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the internal flue gas recirculation system applied to methane powered gas microturbine combustor

Fąfara¹,

Modliński²

2021

Combustion Engines

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The gas microturbines gain significance in various industry sectors. One of their most crucial advantages is the capability of utilizing variety of fuels. At the same time, the emissions regulations become increasingly strict. This is why there is a need to look for a new technological solution to limit the emissions of selected substances, like carbon monoxide (CO) and nitrogen oxides (NOx). The internal recirculation of the flue gases is well known to limit the temperature peak and for the homogenization of the temperature field gradient in different combustion chambers. This paper presents a numerical investigation of a novel internal flue gas recirculation system applied to gas microturbine combustors. The ability to perform an internal exhaust gases recirculation by adding a combustor internal pipe system was verified numerically. This paper exposed the numerical investigation methods and obtained results. The study presents the concept and results performed on three cases of internal exhaust gases recirculation systems applied to a reference combustor. The work permitted to demonstrate numerically that it is possible to perform an autonomous exhaust gases recirculation inside gas microturbine combustor at a maximum global rate of 0.51%, and that the recirculation system has an impact on the combustion processes without specially modifying the combustor work parameters.

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“…Conventional wisdom and numerous studies support a well-balanced diet, appropriate exercise and adequate rest as essential to wellness, disease-prevention and health promotion. 181,182 Aside from healthy diet, exercise and rest, disease-prevention and health promotion may involve such strategies as decreasing viral load, or increasing host immunity.…”

Section: While No Vaccines or Cures For Covid-19 Yet Exist There Is I...mentioning

confidence: 99%

Otorhinolaryngology Out-Patient Practice in the “Post”-COVID-19 Era: Ensuring a Balance Between Service and Safety

Lapeña

Abes

Gomez

et al. 2020

Philipp J Otolaryngol Head Neck Surg

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Objective: To review available resources and provide evidence-based recommendations that may optimize otorhinolaryngologic out-patient health care delivery in the “post”-COVID-19 era while ensuring the safety of our patients, healthcare workers and staff. Data Sources: Relevant peer-reviewed journal articles; task force, organizational and institutional, government and non-government organization recommendations; published guidelines from medical, health-related, and scientific organizations. Methods: A comprehensive review of the literature on the COVID-19 pandemic as it pertained to “post”-COVID 19 out-patient otorhinolaryngologic practice was obtained from peer-reviewed articles, guidelines, recommendations, and statements that were identified through a structured search of the data sources for relevant literature utilizing MEDLINE (through PubMed and PubMed Central PMC), Google (and Google Scholar), HERDIN Plus, the World Health Organization (WHO) Global Health Library, and grey literature including social media (blogs, Twitter, LinkedIn, Facebook). In-patient management (including ORL surgical procedures such as tracheostomy) were excluded. Retrieved material was critically appraised and organized according to five discussion themes: physical office set-up, patient processing, personal protection, procedures, and prevention and health-promotion. Conclusion: These recommendations are consistent with the best available evidence to date, and are globally acceptable while being locally applicable. They address the concerns of otorhinolaryngologists and related specialists about resuming office practice during the “post”-COVID-19 period when strict quarantines are gradually lifted and a transition to the “new” normal is made despite the unavailability of a specific vaccine for SARS-CoV-2. While they target practice settings in the Philippines, they should be useful to ENT (ear, nose & throat) surgeons in other countries in ensuring a balance between service and safety as we continue to serve our patients during these challenging times. Keywords: COVID-19; SARS-CoV-2; otorhinolaryngology; otolaryngology head and neck surgery;ENT; out-patient practice; clinic practice.

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CFD Application for Gas Turbine Combustion Simulations

Cited by 10 publications

References 9 publications

Computational Fluid Dynamics (CFD) Assessment of the Internal Flue Gases Recirculation (IFGR) Applied to Gas Microturbine in the Context of More Hydrogen-Enriched Fuel Use

Computational Fluid Dynamics (CFD) Assessment of the Internal Flue Gases Recirculation (IFGR) Applied to Gas Microturbine in the Context of More Hydrogen-Enriched Fuel Use

Numerical investigation of the internal flue gas recirculation system applied to methane powered gas microturbine combustor

Otorhinolaryngology Out-Patient Practice in the “Post”-COVID-19 Era: Ensuring a Balance Between Service and Safety

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