A combustor liner cooling system design methodology based on a fluid/structure approach

Laraia, Massimo; Manna, M.; Cinque, G.; Martino, P. Di

doi:10.1016/j.applthermaleng.2013.06.012

Cited by 11 publications

(5 citation statements)

References 64 publications

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“…There are four main types of cooling systems (Figure 3): film, impingement, effusion and transpiration cooling (Laraia et al , 2013; Wadia, 1988). The comparison of combustor liner cooling systems is shown in Figure 4.…”

Section: Technologies In Combustor Developmentmentioning

confidence: 99%

Design methodology for combustor in advanced gas turbine engines: a review

Kim,

Jin,

et al. 2024

AEAT

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Purpose A combustor design is a particularly important and difficult task in the development of gas turbine engines. During studies for accurate and easy combustor design, reasonable design methodologies have been established and used in engine development. The purpose of this paper is to review the design methodology for combustor in development of advanced gas turbine engines. The advanced combustor development task can be successfully achieved in less time and at lower cost by adopting new and superior design methodologies. Design/methodology/approach The review considers the main technical problems (combustion, cooling, fuel injection and ignition technology) in the development of modern combustor design and deals with combustor design methods by dividing it into preliminary design, performance evaluation, optimization and experiment. The advanced combustion and cooling technologies mainly used in combustor design are mentioned in detail. In accordance with the modern combustor design method, the design mechanisms are considered and the methods used in every stage of the design are reviewed technically. Findings The improved performances and strict emission limits of gas turbine engines require the application of advanced technologies when designing combustors. The optimized design mechanism and reasonable performance evaluation methods are very important in reducing experiments and increasing the effectiveness of the design. Originality/value This paper provides a comprehensive review of the design methodology for the advanced gas turbine engine combustor.

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Section: Technologies In Combustor Developmentmentioning

confidence: 99%

Design methodology for combustor in advanced gas turbine engines: a review

Kim,

Jin,

et al. 2024

AEAT

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“…Then, substituting (9) in (13), and using the design variables in (1), the first objective function J 1 , which is related to the flow rate in the nozzle design, is obtained and displayed in (14).…”

Section: A: Mass Balancementioning

confidence: 99%

“…] that maximizes the flow rate J 1 (14) and minimizes the bore length J 2 (15), subject to the laminar flow of the fluid (16), the completely developed fluid flow (17), and the minimum flow rate to be accomplished in each bore (18). The MOP is formally formulated in (20).…”

Section: Statement Of the Multi-objective Optimization Problemmentioning

confidence: 99%

Optimum Nozzle Design for a Viscous Liquid by Using Multi-Objective Search Approaches

et al. 2020

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This work deals with the problem of a nozzle design addressed through a multi-objective optimization strategy where governing equations of fluid dynamics model the phenomena. The liquid flow rate and the nozzle length are considered as the design criteria. Two Differential Evolution variants are proposed to obtain a set of design configurations that presents numerous and different synergies between the design criteria. The first variant is based on the Hypervolume performance metric (MODE-HVR) and the second one includes the-dominance concept (MODE-HV R). A comparative study is performed with other optimizers from well-established search approaches for multi-objective optimization such as algorithms based on Pareto dominance (NSGA-II and SPEA2), decomposition (MOEA/D), metric (SMS-EMOA) and hybrid (NSGA-III). Based on the Spacing and Hypervolume indicators of the obtained Pareto fronts, the proposed optimization algorithms can provide more design solutions, promoting the reconfigurability (synergy) in the nozzle design. Hence, the multi-objective design strategy allows the designer to have a wide range of solutions and to choose the most suitable one for a particular application, compared with a traditional design where both design criteria are considered as a single aggregate function. INDEX TERMS Optimum nozzle design, multi-objective optimization, multi-objective search approaches, optimization.

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“…Film cooling is widely adopted to protect the combustion chamber from high temperature, allowing it to be operated at a higher temperature [5,6]. It has been shown that lm cooling could reduce the temperature of the side wall of the combustion chamber by about 800°C [7].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of micro holes with high surface quality and mechanical properties by high-speed laser trepanning and electrochemical post-treatment

Liu,

Wang,

Yang

et al. 2024

Preprint

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Laser processing could drill micro holes with very high efficiency, but the micro holes suffer from recast layers, microcracks and heat-affected zones, which has limited its wide application in engineering. In this paper, the high-speed laser drilling and electrochemical post-treatment has been combined to improve the machining efficiency and surface quality. To reduce the surface sputtering and redeposit in laser drilling, avoid the stray current induced corrosion and improve the machining precision in electrochemical post-treatment, the double-side coating has been applied to the workpiece before processing. Influences of laser power ratio, frequency, duty cycle and defocus amount on the diameter and taper of the laser drilled micro holes were explored experimentally. Results showed that the micro hole diameter increased with the increase of laser power ratio, duty cycle and defocus amount and decreased with the increase of pulse frequency. The micro hole taper increased with the increase of frequency, duty cycle and defocus amount. A laser power ratio of larger than 70% was recommended to reduce the taper of the laser drilled micro holes. Additionally, orthogonal experiments were employed to study the effects of laser power ratio, frequency, duty cycle and defocus on laser drilled micro hole diameter, taper, and recast layer thickness. Results show that duty cycle has the greatest impact on aperture, and power ratio has the greatest impact on taper, and frequency has the greatest impact on the thickness of the recast layer. Micro holes with an average diameter of 0.58 mm, a taper angle of 1.77°, and an average recast layer thickness of 25 µm have been obtained by laser drilling utilizing the optimal parameters. Finally, electrochemical post-processing was adopted to improve the surface quality and mechanical properties of the laser drilled micro holes. Results had shown that micro holes without recast layer and micro cracks were obtained by electrochemical posttreatment with a processing time of 20 s. Moreover, the inner hole surface roughness has been reduced by 68.16% and the micro hardness was reduced by 63.40%. A surface roughness of Ra 0.71 μm has been achieved. The proposed laser and electrochemical machining could be applied to the fabrication of micro holes with high surface quality and high efficiency.

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A combustor liner cooling system design methodology based on a fluid/structure approach

Cited by 11 publications

References 64 publications

Design methodology for combustor in advanced gas turbine engines: a review

Design methodology for combustor in advanced gas turbine engines: a review

Optimum Nozzle Design for a Viscous Liquid by Using Multi-Objective Search Approaches

Fabrication of micro holes with high surface quality and mechanical properties by high-speed laser trepanning and electrochemical post-treatment

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