효율적인 저마하수 유동 음향 포착을 위한 OpenFOAM 기반의 압력기반 압축성 해석자 분석

Abstract

For efficient capturing of low-Mach flow acoustics, a compressible pressure-based semi-implicit algorithm with characteristic splitting is implemented on the OpenFOAM framework. In this paper, detailed descriptions of the OpenFOAM code for SICS algorithms were shown and a comparison study of semi-implicit characteristic splitting (SICS) and compressible PIMPLE algorithm was performed. To validate SICS solver, the aeolian tone of the cylinder was simulated and the corresponding acoustic pressure was compared with the previously reported value. To evaluate pressure-based solver performance, acoustic wave propagation and scattering problems were simulated. It is found that a pressure-based solver with SICS algorithm shows better cost-effective performance on low-Mach flow acoustics than a solver with a compressible PIMPLE algorithm. The present SICS solver was extended to reacting flow and one-dimensional flame structures were resolved correctly. The SICS solver can be used to simulate flame-acoustic coupling of low-Mach flow more efficiently.