국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Measurement of Free-Stream Properties in the NAL 0.1m×0.1m Transonic Cryogenic Wind Tunnel(Part II)
저자	Takeo AOKI, Hideo SAWADA
Keyword	cryogenic wind tunnel; measurement; thermal boundary layer; buoyancy effect
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltm00677.pdf?id=NALTM0000677
보고서번호	NAL TM-677
발행년도	1995.1
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	Temperature distributions at the settling chamber and test section static pressure distributions along the slotted wall are dealt with.Temperature distributions at the settling chamber were measured by two thermocouple probes which were traversed by hand alternately.The variation in temperature at the settling chamber was within ±1K except for the thermal boundary layer along the settling chamber wall.The thermal boundary layer thickness was less than 50mm,but was more than any other station near the leg.Test section static pressure measurements revealed a pressure gradient whose buoyancy effect causes 6 counts of drag rise of the 7.5mm AGARD-B model