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2.5 마일용 GAS INJECTION BUMPER 개발
김용배(Y.B. Kim),장내웅(N.W. Jang),윤진(J. Yun),김한영(H.Y. Kim) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
Conventional bumper systems have been composed of Cover, Foam and Reinf. Thus they were disadvantageous in the aspect of weight, cost and recycling, but this Gim bumper system reinforced by ribs on the back surface of the covcr could simplify the production procedures and its structure by eliminating the E.A foam and Reinf. To prevent sink marks which usually occur on the effective face of a product when ribs for stiffness are added, we have applied Nitrogen gas through the gas channel and thus made the wall thickness generally uniform. This bumper system could be applied to mass production through many trial and errors of tests to satisfy 2.5mph performance.<br/>
신재렬(J.R. Shin),김한영(H.Y. Kim),김대영(D.Y. Kim) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.11
This study is performance estimation of wind augmentation device for BiWP(Building-integrated Wind Power) which recently attracts attention as a local power. various structures are installed on a rooftop of residential complex buildings and other high rise apartment buildings. Changing a profile of these, we designed a configuration that is able to capture much air and increase exit velocity. To estimate wind augmented effect of this device, we compared numerical analysis results with wind tunnel test results. Results show that exit velocity is increased from 24% to 60% by wind augmented device on a rooftop of building and uniform velocity profile is got for comparison without concerning wind augmentation.