市販CFDソフトウェアによる複雑乱流場の再現性: 急峻な傾斜角度を有する3次元孤立地形を対象として

摘要

我々のダループでは，RIAM-COMPACT®(リアムコンパクト)と称する数値風況診断技術の開発を進めている.そのコア技術は，九州大学応用力学研究所で開発が続けられており，第一著者が2006年に起業した九州大学発ベンチャー企業の(株)リアムコンパクトが,(株)産学連携機構九州(九大TLO)から独占的ライセンス使用許諾を受けている.同年には，RIAM-COMPACT®の商標と実用新案を取得した.%It is highly important in Japan to choose a good site for wind turbines, because the spatial distribution of wind speed is quite complicated over steep complex terrain. We have been developing the unsteady CFD code called the RIAM-COMPACT®. The RIAM-COMPACT® is based on LES turbulence model. In this paper, to test the accuracy of the RIAM-COMPACT®, we have performed a numerical simulation of a non-stratified airflow past a three-dimensional hill in a uniform flow. Attention is focused on airflow characteristics in the wake region. Through comparison of the commercial CFD software (STAR-CCM+), the results from the RIAM-COMPACT® are in good agreement with those obtained from STAR-CCM+.