초임계 디젤연소 모사를 위한 압력기반 SLAU2와 실제유체 FPV 모델을 활용한 수치해석 기법의 개발과 적용
Development and Application of a Numerical framework for the Simulation of Supercritical Diesel Combustion using Pressure based SLAU2 with Real Fluid Flamelet Progress Variable Model
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초록
A numerical framework for efficient and robust simulation of supercritical Diesel combustion is developed in this study. One major problem in supercritical flow simulation is appearance of non-physical pressure oscillation at the interface of fluids with a large magnitude density gradient. To simulate supercritical flow without the spurious pressure oscillation, the pressure based SLAU2 scheme is implemented using OpenFOAM library. Also, the flamelet progress variable model with real fluid equation of state is utilized to efficiently describe combustion process. The numerical framework is applied for the Spray A benchmark case of the Engine Combustion Network. The simulation results indicate that the proposed numerical framework can capture basic features of supercritical Diesel spray mixing and combustion.
Abstract
A numerical framework for efficient and robust simulation of supercritical Diesel combustion is developed in this study. One major problem in supercritical flow simulation is appearance of non-physical pressure oscillation at the interface of fluids with a large magnitude density gradient. To simulate supercritical flow without the spurious pressure oscillation, the pressure based SLAU2 scheme is implemented using OpenFOAM library. Also, the flamelet progress variable model with real fluid equation of state is utilized to efficiently describe combustion process. The numerical framework is applied for the Spray A benchmark case of the Engine Combustion Network. The simulation results indicate that the proposed numerical framework can capture basic features of supercritical Diesel spray mixing and combustion.
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