Effect of the Precessing Vortex Core on Primary Atomization
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Abstract
The present work is focused on the airblast atomization in a gas turbine model combustor. Swirl flows in such combustion chambers form an inner recirculation zone that can develop a precessing vortex core. This instability affects the velocity field at the exit of the nozzle, where the fuel is atomized. The influence of the precessing vortex core on the airblast atomization is examined in this work. The flow field in the combustion chamber is examined under reacting and non-reacting conditions. The velocity amplitudes under reacting conditions are more than twice as high compared to non-reacting conditions. The influence of the precessing vortex core on the airblast atomization process is examined in detail at an atomization test rig with a perspex nozzle. High speed shadowgraphy and POD analysis have been performed of the liquid film on the prefilmer as well as on the ligaments formed at the atomizing edge. It was observed that although the PVC does affect the liquid film flow of the prefilming surface, it does not affect the breakup into ligaments, i. e. primary atomization.
Acknowledgement
The authors gratefully acknowledge the German Science Foundation (DFG) for financial support of the work in the framework of the Collaborative Research Centre SFB 606.
Another part of the research has been founded by the European Community's Seventh Framework Program (FP7/SP1-JTI-CS-2013-01) under Grant Agreement number CS-GA-2013-620143.
©2015 Walter de Gruyter Berlin/Boston
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- Frontmatter
- Preface
- Congratulations to Henning Bockhorn
- Nonpremixed and Premixed Combustion of Mixtures of Producer Gas and Methane
- Hierarchical Structure of Slow Manifolds of Reacting Flows
- Analysis of Structure, Extinction and Broadening in Oxygen-Enhanced Non-Premixed Flames
- Decomposition Studies of Isopropanol in a Variable Pressure Flow Reactor
- Effect of the Precessing Vortex Core on Primary Atomization
- Adaptive Multiresolution Computations Applied to Detonations
- Partial Oxidation of Methane at Elevated Pressures and Effects of Propene and Ethane as Additive: Experiment and Simulation
- Luminescence Properties of the Thermographic Phosphors Dy3+:YAG and Tm3+:YAG for the Application in High Temperature Systems
- Thermochemical Properties of Hydroxycyclohexadienyl Peroxy Isomers from Reaction of O2 with the Benzene-OH adduct
Articles in the same Issue
- Frontmatter
- Preface
- Congratulations to Henning Bockhorn
- Nonpremixed and Premixed Combustion of Mixtures of Producer Gas and Methane
- Hierarchical Structure of Slow Manifolds of Reacting Flows
- Analysis of Structure, Extinction and Broadening in Oxygen-Enhanced Non-Premixed Flames
- Decomposition Studies of Isopropanol in a Variable Pressure Flow Reactor
- Effect of the Precessing Vortex Core on Primary Atomization
- Adaptive Multiresolution Computations Applied to Detonations
- Partial Oxidation of Methane at Elevated Pressures and Effects of Propene and Ethane as Additive: Experiment and Simulation
- Luminescence Properties of the Thermographic Phosphors Dy3+:YAG and Tm3+:YAG for the Application in High Temperature Systems
- Thermochemical Properties of Hydroxycyclohexadienyl Peroxy Isomers from Reaction of O2 with the Benzene-OH adduct
