Numerical Investigation of Non-Premixed Hydrogen Flame Dynamics Using RANS Models

EasyChair Preprint 14538

Abstract

Hydrogen fuel has sparked major stakeholders as an alternative to fossil fuel in industrial gas turbine or aerospace applications, considering its clean energy to reduce greenhouse gas emissions. Furthermore, hydrogen is known to have higher gravimetric energy density than conventional fuel. However, understanding hydrogen flames is particularly challenging due to the intricate nature of the turbulence characteristics. Hence, in this work, non-premixed turbulent hydrogen flames are numerically investigated using commercially available software. The aim of this work is to assess the predictability of various RANS turbulence models for an axisymmetric case, including standard, modified, realizable, and Pope correction models. Simulation of test cases has shown that the realizable model exhibits the best accuracy in the centerline region further downstream with high accuracy for the centerline mean temperature. The modified model demonstrates superior predictability near the injector exit plane in the radial direction. Overall, the findings suggest that RANS models are effective for initial data collection in the early stages of the design process, providing valuable insights into the behavior of hydrogen flames.

Keyphrases: RANS, hydrogen flames, non-premixed turbulent flame, numerical

@booklet{EasyChair:14538,
  author    = {Hafidz Jakaria and Naef Qasem and Binash Imteyaz},
  title     = {Numerical Investigation of Non-Premixed Hydrogen Flame Dynamics Using RANS Models},
  howpublished = {EasyChair Preprint 14538},
  year      = {EasyChair, 2024}}