Combustion flow in different advanced vortex combustors with/without vortex generator

Zeng, Ziyue; Du, Peng; Wang, Zhikai; Li, Kai

doi:10.1016/j.ast.2019.01.048

Cited by 37 publications

(7 citation statements)

References 13 publications

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“…The high-energy vortex was generated at the tail of VGs and could suppress the flow separation. VGs had a wide range of applications (Bagheri et al, 2021; Ramanathan et al, 2019; Rao et al, 2020; Skrzypiński et al, 2020; Zeng et al, 2019). Skrzypiński et al (2020) analyzed the effect of the retrofitting VGs on the blades of the megawatt-sized wind turbine.…”

Section: Methodsmentioning

confidence: 99%

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Chen

Wang

et al. 2021

Wind Engineering

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The transition area of the blade had a large relative thickness of airfoil, which was prone to the flow separation. The vortex generators (VGs) could restrain the flow separation. In this paper, the VGs were installed at the transition area of the WindPACT 1.5 MW wind turbine blades. The numerical simulation method was used to investigate the effects of the VGs on the aerodynamic performance of the blade. The high-energy vortexes were generated at the tail by the VG. It could change the energy distribution and flow characteristics of the airflow in the boundary layer. There were influences by the geometric parameters of the VGs. The VGs could change the aerodynamic performance at the transition area of the blade. A satisfactory result was obtained for reasonable geometrical parameters of the VGs. It also could restrain the flow separation of the blade surface and improve the torque.

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Section: Methodsmentioning

confidence: 99%

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Chen

Wang

et al. 2021

Wind Engineering

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“…LES techniques using SiTCom parallel flow solver coupled with explicit finite volume scheme for cartesian grids were used in the simulations to study reactive and nonreactive cases (Merlin et al, 2011(Merlin et al, , 2012. Much simpler approximation using RANS with k-v turbulence model for non-reactive cold flow cases were also used (Selvaganesh and Vengadesan, 2008;Zeng et al, 2019). For the geometry of Katta and Roquemore (1996), improvements in turbulence approximations were made by incorporating nonlinear k-v and modified k-v models using user defined functions (Selvaganesh and Vengadesan, 2008).…”

Section: Numerical Studies On Forebody-spindle-aftbody Geometry Of Tr...mentioning

confidence: 99%

A review of computational studies on trapped vortex combustors for gas turbine applications

Narayanan

K.M.²

2022

AEAT

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Purpose The purpose of this paper is to comprehensively evaluate the progress in the development of trapped vortex combustors (TVCs) in the past three decades. The review aims to identify the needs, predict the scope and discuss the challenges of numerical simulations in TVCs applied to gas turbines. Design/methodology/approach TVC is an emerging combustion technology for achieving low emissions in gas turbine combustors. The overall operation of such TVCs can be on very lean mixture ratio and hence it helps in achieving high combustion efficiency and low overall emission levels. This review introduces the TVC concept and the evolution of this technology in the past three decades. Various geometries that were explored in TVC research are listed and their operating principles are explained. The review then categorically arranges the progress in computational studies applied to TVCs. Findings Analyzing extensive literature on TVCs the review discusses results of numerical simulations of various TVC geometries. Numerical simulations that were used to optimize TVC geometry and to enhance mixing are discussed. Reactive flow studies to comprehend flame stability and emission characteristics are then listed for different TVC geometries. Originality/value To the best of the authors’ knowledge, this review is the first of its kind to discuss extensively the computational progress in TVC development specific to gas turbine engines. Earlier review on TVC covers a wide variety of applications including land-based gas turbines, supersonic Ramjets, incinerators and hence compromise on the depth of analysis given to gas turbine engine applications. This review also comprehensively group the numerical studies based on geometry, flow and operating conditions.

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“…Then, a study conducted through numerical simulation is done for understanding annular AVC model and its features. Next, AVCs with different combustion flows are studied [10,11]; the study shows that vortex-generator-based AVC performs better than those pure AVC. Based on this, it studies how parameters of injections affect AVC performances.…”

Section: Introductionmentioning

confidence: 99%

Combustion Turbulence Flow in the Advanced Vortex Combustor with Built-In Obstacles

Zeng

Wang

2021

International Journal of Aerospace Engineering

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To obtain the advanced vortex combustor (AVC) and its optimal structure parameters in light of built-in obstacles, numerical simulation was performed. This research shows that inclined struts have optimal structural parameters with inclination angle α = 30 ° and blocking ratio BR = 12 %, while guide vane and its optimal structural parameter have three layers, which are a / B = 0.1 , b / h = 0.4 , and c / L = 0.2 , respectively; blunt body has the biggest height of H 1 / B 1 = 2 / 3 . According to these statistics, the research studies how inlet factors affect turbulence flow in combustion. The research finds increases in inlet velocity and flow resistance are in positive correlation. As inlet temperature increases, the flow resistance decreases. From field synergy theory, inlet factor has different effect on the heat transfer performance.

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Combustion flow in different advanced vortex combustors with/without vortex generator

Cited by 37 publications

References 13 publications

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

A review of computational studies on trapped vortex combustors for gas turbine applications

Combustion Turbulence Flow in the Advanced Vortex Combustor with Built-In Obstacles

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