Grant-in-Aid for Scientific Research (B).
|Research Institution||TOHOKU UNIVERSITY|
NAKAHASHI Kazuhiro Graduate School of Engineering, Tohoku University, Professor, 大学院・工学研究科, 教授 (00207854)
山根 善行 石川島播摩重工業(株), 技術研究所, 研究員
安藤 安則 石川島播磨重工業株式会社, 技術研究所・流体・燃焼部, 課長(研究職)
KATO Takuma Graduate School of Engineering, Tohoku University, Assistant, 大学院・工学研究科, 助手 (60292231)
OBAYASHI Shigeru Graduate School of Engineering, Tohoku University, Associate Professor, 大学院・工学研究科, 助教授 (80183028)
FUKUNISHI Yu Graduate School of Engineering, Tohoku University, Associate Professor, 大学院・工学研究科, 助教授 (60189967)
三谷 徹 航空宇宙研究所, 角田ロケット開発センター・ラム燃焼研究室, 室長(研究職)
MITANI Toru National Aerospace Laboratory, Researcher
ANDO Yasunori Ishikawajima-Harima Heavy Industry, Researcher
|Project Fiscal Year
1997 – 1999
Completed(Fiscal Year 1999)
|Budget Amount *help
¥12,200,000 (Direct Cost : ¥12,200,000)
Fiscal Year 1999 : ¥1,900,000 (Direct Cost : ¥1,900,000)
Fiscal Year 1998 : ¥4,400,000 (Direct Cost : ¥4,400,000)
Fiscal Year 1997 : ¥5,900,000 (Direct Cost : ¥5,900,000)
|Keywords||Unstructured grid / Computational fluid dynamics / 非構造格子 / 数値流体力学|
The present study is to refine and examine the unstructured-grid CFD (computational fluid dynamics) so as to use it as a practical engineering tool for analysis and design of fluid machineries. In the three-year research, the following results were obtained.
(1) A new method to generate unstructured surface grid on the CAD-define model was developed. With this method, the pre-processing procedure of the unstructured-grid CFD was significantly simplified
(2) An implicit time integration and a space marching solution algorithms were developed to reduce the computational time of the flow solver on unstructured grids. The applicability of the flow solver was also extended to combustion and incompressible flows.
(3) A solution-adaptive refinement method coupled with a flow-feature detection was proposed. This method was demonstrated of its effectiveness for the high-alpha delta wings.
(4) An overset unstructured grid method was proposed to compute flow around multiple bodies with relative motions.
(5) The accuracy and usefulness of the unstructured-grid CFD were evaluated by applying it to wings, airplanes, SCRAM jet engines, cavity and rectangular-duct flows, and so on.
These results met more than our expectations. The newly proposed algorithms during the research have already been recognized in the international academic conferences. Several new directions of the unstructured-grid CFD, such as optimization, were also commenced during this research.