국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	The Renewing of the Test Section of the NAL Transonic Wind Tunnel Part 1. Reconstruction of the lst Corner Turning Vanes and Aerodynamic Stress Measurement
저자	Akira KOIKE, Nobuyuki HOSOE, Yasuo OGUNI, Koichi SUZUKI, Hitoshi MIWA
Keyword	Transonic wind tunnel; Turning vanes; Aerodynamic stress; Fatigue; Pressure fluctuation
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltm00651.pdf?id=NALTM0000651
보고서번호	NAL TM-651
발행년도	1992.12
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	National Aerospace Laboratory (NAL) Transonic Wind Tunnel was constructed in 1960, and in-depth repairs of its superannuated parts was begun in 1985. In this paper, the newly reconsructed turning vanes are described. The thickness of the turning vanes was 6 mm at first and it was increased to 9 mm in 1968 to prevent cracks caused by from developing. Despite of this increase in thickness, cracks were observed again. With the present reconstruction, the thickness was increased to 12 mm. Tests designed to measure the stresses within the vanes by aerodynamic force and pressure fluctuations of incoming flow were conducted before and after recon-struction. Results from the measurements are presented including a correlation analysis between the stress and the pressure fluctuation