Towards EFD/CFD integration: Development of DAHWIN-Digital/Analog-hybrid wind tunnel

Shigeya Watanabe, Shigeru Kuchi-Ishi, Keiichi Murakami, Atsushi Hashimoto, Hiroyuki Kato, Tatsuya Yamashita, Kanako Yasue, Kentaro Imagawa, Hideji Saiki, Jyun Ogino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The development of ‘Digital/Analog-Hybrid WINd tunnel (DAHWIN),’ which is an innovative system integrating CFD (Computational Fluid Dynamics) with EFD (Experimental Fluid Dynamics), is presented. The aim of DAHWIN is to improve efficiency, accuracy, and reliability of aerodynamic characteristics evaluation in aerospace vehicle developments through mutual support between EFD and CFD. DAHWIN is constructed as a system seamlessly connecting two large facilities, JAXA 2m x 2m Transonic Wind Tunnel for EFD and JAXA Supercomputer System for CFD. The function of this system consists of optimization of test planning, an accurate correction of the wind tunnel wall and support interaction effects, quasi-simultaneous monitoring of EFD data in comparison with corresponding CFD data, the most probable aerodynamic characteristics estimation based on both EFD and CFD data, and so forth. Each function is described with some examples of applications. Key technical challenges in the system development, such as an automatic grid generator, high-speed CFD solver, and a high-speed data processing technique for image measurement data, are also addressed. Some preliminary applications of DAHWIN to practical wind tunnel tests, such as civil transport tests, showed the usefulness and reliability of DAHWIN in terms of increasing efficiency and accuracy of both EFD and CFD.

Original languageEnglish
Title of host publication52nd Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624102561
Publication statusPublished - 2014
Externally publishedYes
Event52nd Aerospace Sciences Meeting 2014 - National Harbor, United States
Duration: 2014 Jan 132014 Jan 17

Publication series

Name52nd Aerospace Sciences Meeting


Other52nd Aerospace Sciences Meeting 2014
Country/TerritoryUnited States
CityNational Harbor

ASJC Scopus subject areas

  • Aerospace Engineering


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