Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 29, 2018 - November 30, 2018
In this study, we clarify the influence of the total number and resolution of the computational grids on the accuracy of the numerical analysis by using the large eddy simulation for a small box fan. We analyze the accuracy by using four computational grids with different resolutions and total numbers of the grids. These grids have different resolution in the outlet region and the grid type near the blade-wall surface. As a result, application of the prism-type mesh near the blade-wall surface has been found crucial for resolving thin laminar boundary layers, and thus improving the prediction accuracy of the performance curve. The grid resolution in the wake region has less influence on the prediction accuracy of the aerodynamic noise.
