Application of algebraic model for sub-grid turbulent kinetic energy and non-viscosity subgrid model to large eddy simulation of fuel spray

作者：Zhou Lei^*; Xie Mao Zhao; Luo Kai Hong; Shuai Shi Jin; Jia Ming; Qin Wen Jin

来源：Transactions of CSICE, 2013, 31(3): 215-221.

• Computational results
• Constant-volume vessel
• Evaporation process
• Liquid
• and vapor phase
• Spray
• Subgrid model
• Turbulent diffusion
• Turbulent kinetic energy

Three sub-grid models considering an algebraic model for the sub-grid turbulent kinetic energy and non-viscosity sub-grid model with K-equation turbulent kinetic energy model were implemented into the KIVA3V code to investigate the atomization and evaporation processes of diesel spray in a constant volume vessel. Based on the experimental results of the liquid and vapor phase distributions as well as the results obtained by the differential sub-grid scale kinetic energy(K-equation)model, this paper reveals the influence of the algebraic sub-grid turbulent kinetic energy model and non-viscosity sub-grid model on the prediction of fuel spray. Computational results show that by combining the three algebraic sub-grid models and the algebraic sub-grid turbulent energy model, the turbulent diffusion of droplets can be reasonably simulated. The liquid penetration and the predicted liquid and fuel vapor mass fraction contours are close to the experimental results. The turbulent kinetic energy given by the DSM model is in agreement with the results by the K-equation model. The added non-viscosity model accurately predicts the experimental results.

• 出版日期2013
• 单位清华大学