Influence of inlet swirl on pattern factor and pressure loss in an aero engine combustor

Rao, K. N. Shivashankara; Prasad, Bvsss; Babu, Ch. Kanna; Degaonkar, Girish K.

doi:10.1177/09544062211027209

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…Different types of combustion chambers have been developed in the past century and different fuels are used there. In aero-engine or gas turbine combustor design, complete combustion, 1-3 low total pressure loss, 4 stability, 5,6 freedom from flash back and flame out, 7,8 relightabality, 9,10 occupying a small space, and no hot spots [11][12][13] are desired, and many researches have been performed on these areas to have better designs.…”

Section: Introductionmentioning

confidence: 99%

Coating roughness impact on the combustion chambers life of the turbo engines

Masrouri,

Tahsini,

Vahabi

2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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The objective of this study is to determine the impact of the convective heat transfer coefficient and the heat conduction coefficient on the metal temperature by studying heat conduction in the base metal and the coating under hot gas convection as well as the cooling flow using analytical methods. Increasing the convective heat transfer results in lower conduction of the coating that is necessary to maintain the metal temperature at the determined level. The surface roughness of the coating is therefore an influential factor in determining metal temperatures and plays a significant role in the lifespan of the hot sections of turbo engines. This phenomenon is numerically studied for the SGT-100 combustion chamber and the results demonstrate that the roughness can considerably increase the wall heat flux of the combustor. This means that the coating should be manufactured so that the coating surface has a lower roughness level. Otherwise, the higher heat flux will cause damage to the combustion chamber.

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Section: Introductionmentioning

confidence: 99%

Coating roughness impact on the combustion chambers life of the turbo engines

Masrouri,

Tahsini,

Vahabi

2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…The study's findings showed that 75° was the best-optimized design (in terms of turbulent kinetic energy) for achieve superior swirl [16]. Furthermore, this research provides insight into how to develop novel methods for enhancing mixing by increasing turbulent kinetic energy [16,17].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics: Flow Analysis on The Effect of Different Jet Orifice Angle Multi Circular Jet for Fuel and Air Mixing

Ridzwan Kamaruddin,

Syabillah Sulaiman,

Amir Khalid

et al. 2023

CFDL

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The mixing of fuel and air plays a major role in the spray and flame behavior, hence affecting the combustion performance and emissions of the internal mixing air-assisted atomizers. Air-assisted atomizers are introduced to counter the low-pressure differential of a simplex nozzle, which reduces the atomization quality. The present study aims to determine the effects of Multi Circular Jet (MCJ) plates on the geometrical configurations of internal flows in mixing chamber and the internal flow of plate 3 using different properties of fuel. In this study, the realizable k-ε turbulence model, specifically designed for strongly swirling flows, is validated through numerical simulations. The turbulence model selected is a type of Reynolds averaged Navier-Stokes (RANS) model called the k-ε model. The MCJ plates provide the primary air entrance into the mixing chamber. Additionally, it acts as a turbulence generator and can be adjusted to alter the flow of fuel and air mixtures in a mixing chamber. The study compares several MCJ geometries in terms of pressure, speed, turbulent kinetic energy, and volume fraction and compares the performances of diesel and Crude Palm Oil (CPO) B30 biodiesel fuels. The findings imply that CPO B30 biodiesel has superior atomization and mixing due to its higher density and turbulent kinetic energy. CPO B30 biodiesel was compared to Diesel in terms of maximum pressure, average speed, turbulent kinetic energy per unit mass, and volume fraction. The results indicate that CPO B30 has lower pressure and higher velocity than Diesel, suggesting better fuel atomization and mixing. The higher density of CPO B30 leads to increased turbulent kinetic energy, improving fuel-air mixing inside the combustion chamber. The study demonstrates that the use of MCJ plates can enhance mixing in a mixing chamber. In addition, MCJ plates show the ability to control the spray and atomization. The findings of this study contribute to a better understanding of the relationships between geometry and fuel-air mixing, as well as the characteristics of the internal mixing air-assisted atomizer, which will lead to future burner system improvements.

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Investigation on unsteady formation and evolution of high-temperature zone in a staged swirl combustor

Li,

Zhang,

et al. 2024

Applied Thermal Engineering

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Influence of inlet swirl on pattern factor and pressure loss in an aero engine combustor

Cited by 5 publications

References 20 publications

Coating roughness impact on the combustion chambers life of the turbo engines

Coating roughness impact on the combustion chambers life of the turbo engines

Computational Fluid Dynamics: Flow Analysis on The Effect of Different Jet Orifice Angle Multi Circular Jet for Fuel and Air Mixing

Investigation on unsteady formation and evolution of high-temperature zone in a staged swirl combustor

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