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Computational Investigation on the Influence of Dump Gap and Novel Flame Tube Geometries in the Hybrid Diffuser Performance
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Author(s): Bruce Ralphin Rose (Anna University Regional Campus, Tirunelveli, India), Bibal Benifa J. V. (Indian Institute of Information Technology, Kottayam, India)and Ramzania M. (Anna University Regional Campus, Tirunelveli, India)
Copyright: 2022
Pages: 24
Source title:
Handbook of Research on Aspects and Applications of Incompressible and Compressible Aerodynamics
Source Author(s)/Editor(s): Sathish K. Kumar (Nehru Institute of Engineering and Technology, India)and Naren Shankar Radhakrishnan (Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, India)
DOI: 10.4018/978-1-6684-4230-2.ch016
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Abstract
The chapter addresses an extensive numerical investigation for the optimization of static pressure recovery in the dump diffuser of annular combustor for modern aero-gas turbine engines. The modelling and simulation processes are accomplished through the commercial ANSYS fluent module with SST k-epsilon (k-ɛ) turbulence model with the atmospheric conditions prevailing at 9 km altitude. The effect of velocity changes on the flow recirculation and vortex mixing phenomena is also addressed with novel dome-shaped optimization at the velocity of 25 m/s. The dome geometry can also be considered as a flame tube head, and the influence of vortex pattern and pressure distributions caused by the different dome shapes are analyzed using CFD. The dome-shaped optimization strategy addressed herein could initiate more potential studies on dump diffusers with hot and cold flow conditions to enhance the overall combustion efficiency in the near future.
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