Computational Investigation on the Influence of Dump Gap and Novel Flame Tube Geometries in the Hybrid Diffuser Performance-Reference-Cited by-同舟云学术

Computational Investigation on the Influence of Dump Gap and Novel Flame Tube Geometries in the Hybrid Diffuser Performance

Published:2022-06-24 Issue: Volume: Page:343-366
ISSN:2328-8205
Container-title:Handbook of Research on Aspects and Applications of Incompressible and Compressible Aerodynamics
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Author:

Rose Bruce Ralphin¹,J. V. Bibal Benifa²,M. Ramzania¹

Affiliation:

1. Anna University Regional Campus, Tirunelveli, India

2. Indian Institute of Information Technology, Kottayam, India

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.

Publisher

IGI Global

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