Aerodynamic Simulations of a High-Lift configuration by Lattice Boltzmann Method with Block-Structured Cartesian Grid

摘要

In this paper, we propose a computational approach based on Lattice Boltzmann Method (LBM) and apply it to the aerodynamic/aeroacoustic simulations around a high-lift configuration. In our approach, we couple LBM and Building-Cube Method (BCM), which is the framework of a block-structured Cartesian grid approach proposed by Nakahashi, to enhance the parallel efficiency and keep the simplicity of source code. To overcome the stability problem due to the treatment of collision operator in standard LBGK model, cascaded-LBM is used. The proposed method is applied to the aerodynamic/aeroacoustic simulation around 30p30n high-lift device configuration which is one of the benchmark problem of AIAA BANC workshop and Aerodynamics Prediction Challenge Ⅳ (APC-Ⅳ) in Japan. The resulted aerodynamic forces and near field acoustic data are compared with the experimental data and computational results by other researchers to show the current capability of present approach.