小型水素ガスタービン燃焼器のLES解析

抄録

The objective of this study is to realize the low NOx emission from a carbon neutral micro gas turbine engine utilizing high fidelity reactive flow simulation. In this paper, large eddy simulation (LES) with a turbulent combustion model using a generalized fluid interface mathematical model proposed by Oshima is applied to predict the combustor performance of a hydrogen micro gas turbine. The simulation of 23million nodes unstructured grid and 240,000 time steps is completed in approximately 10 days using 720 parallel cores (2400 node hours) of Osaka University super computer “SQUID”. The simulation results show that LES well predicted the unsteady behavior of the turbulent combustion flow in the combustor chamber and the combustor performance as well as the correlation between the equivalent ratio and NO production qualitatively.