RANS NUMERICAL SIMULATION OF LEAN PREMIXED BLUFF BODY STABILIZED COMBUSTOR: COMPARISON OF TURBULENCE MODELS

Year 2017, , 1561 - 1573, 04.10.2017

A.f. Sudarma

https://doi.org/10.18186/journal-of-thermal-engineering.353668

Cited By: 7

Abstract

Many gas turbine combustors use bluff-body flameholders to enhance
mixing and maintain flame stabilization inside the combustor. Computational
Fluid Dynamics (CFD) can greatly help in the design and development of gas
turbine combustors. In this regard, CFD analyses using k-ε and Reynold
Stress Model (RSM) approaches are being evaluated through simulating the
combustion processes inside a bluff body stabilized gas turbine combustor where
a mixture of lean premixed methane-air are burnt. The numerical study is
performed under a steady state condition utilizing the commercial software
ANSYS-FLUENT. The simulated results are compared with available experimental
data as well as published simulation results found in the literature.  The results are presented and compared in
terms of velocity fields, temperature profiles and species distributions. The
results show that both adopted turbulence models k-ε and RSM reasonably
made a well predictions of the combustion process with such kind of combustor,
especially k-ε turbulence model.

Keywords

Combustion Modeling, Bluff-Body Flame Stabilizer, K-Ε Turbulence Model

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