Open Access
ABSTRACT
Multi-physics CFD Simulation in a Jet Engine
Makoto Yamamoto1,*
1 Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
* Corresponding Author: Makoto Yamamoto. Email:
The International Conference on Computational & Experimental Engineering and Sciences 2021, 23(1), 19-19. https://doi.org/10.32604/icces.2021.08478
Abstract
In a turbine of a jet engine, deposition phenomenon is often observed.
Deposition is a phenomenon that particles such as volcanic ash, sand and dust
passing through a combustion chamber of a jet engine are melt, rapidly cooled
and then accumulate on the turbine blade and end-wall surfaces. Deposition is
one of critical problems when aircraft flies in a cloud with many particles.
Obviously, deposition can degrade the aerodynamic performance of the turbine
blade and vane, and make partial or complete blockage of film-cooling holes. As
the result, deposition deteriorates safety and life time of the turbine. In the past
investigations, a lot of researches have focused on the effect of deposition on
aerodynamic performance and cooling efficiency. The dependency of deposition
on wall temperature was also investigated. However, the deposition mechanism
itself remains unclear, especially at high temperature condition in a jet engine.
This is because it is too difficult to conduct the detailed measurements due to the
small size of particles and the high temperature in a turbine. Additionally, as it
can be expected that deposition is a typical multi-physics phenomenon, the
physics is very complex. Therefore, a reliable deposition model has not been
established and validated yet. If the mechanism could be clarified, it is possible
to develop a good deposition model and realize more accurate predictions of
deposition phenomenon in a jet engine. Considering these backgrounds, in the
present presentation, I will explain our computational researches on deposition
phenomenon in a jet engine. First, a numerical method to predict deposition
phenomenon in a jet engine is proposed, based on the grid-based method and
multi-physics modeling. Some existing deposition models which were
empirically derived are validated to a canonical condition, and then the best
model is applied to a turbine vane. Through this study, the characteristics of
deposition on the turbine vane is clarified. Second, in order to clarify the
deposition mechanism, solidification of a high temperature droplet is reproduced,
using the particle-based method. Based on the numerical results, the detail of
solidification process is investigated.
Keywords
Cite This Article
Yamamoto, M. (2021). Multi-physics CFD Simulation in a Jet Engine.
The International Conference on Computational & Experimental Engineering and Sciences, 23(1), 19–19. https://doi.org/10.32604/icces.2021.08478