An Empirical Study on the Strategic Improvement of Aerodynamic Performance for Practical Bluff Bodies Based on the Unsteady Aerodynamics
| Project/Area Number |
26289033
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Kobe University (2015-2016)
Hokkaido University (2014) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
中島 卓司 広島大学, 工学(系)研究科(研究院), 助教 (40444707)
大西 慶治 国立研究開発法人理化学研究所, その他部局等, 研究員 (90650036)
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| Research Collaborator |
NOUZAWA Takahide マツダ株式会社, 技術研究所, 技監
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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| Keywords | 流体工学 / 空気力学 / 車両空力 / 数値解析 / ラージエディシミュレーション / シミュレーション工学 / 自動車工学 / 輸送機器 |
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| Outline of Final Research Achievements |
Massively parallel Large-Eddy Simulation of flow around road vehicles were conducted considering their complicated geometry and interaction among various trailing vortices generated as a result of the boundary layer separation on the vehicle's surface were investigated, with its focus on their unsteady feature. Fully unstructured finite volume method coupled with vehicle's 6DoF motion and driver's reaction model were developed and utilized for the study. Mode decomposition methods like POD or DMD were applied to the transient numerical results and dominant instability modes of various trailing vortices and their relationship with vehicle's dynamic motion were revealed. Based on the obtained knowledge, strategic flow optimization method to realize both reduction of aerodynamic drag and improvement of high-speed stability or cross-wind safety was proposed.
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Report
(4 results)
Research Products
(45 results)
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[Presentation] Aerodynamics Evaluation of Road Vehicle in Dynamic Maneuvering2016
Author(s)
Yoshihiro Okada, Takuji Nakashima, Yousuke Morikawa, Makoto Tsubokura, Satoshi Okamoto, Matsuhiro Tanaka, Takahide Nouzawa
Organizer
2016 SAE World Congress, Technical Paper 2016-01-1618
Place of Presentation
Cobo Center, Detroit, Michigan, USA
Year and Date
2016-04-12
Related Report
Int'l Joint Research
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