• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2009.06a
• /
• pp.1109-1110
• /
• 2009

• Proceedings of the Optical Society of Korea Conference
• /
• 1991.06a
• /
• pp.168-171
• /
• 1991

홀로그래피 간섭무늬로부터 변형의 요철방향을 구하기 위하여 무늬반송법을 응용하였다. 변형에 의해 형성된 간섭무늬의 차수가 기준무늬를 따라 한 방향으로 증가하도록 하였으며, 디자탈 영상처리 기술을 이용하여 간섭무늬 해석을 자동화 하였다.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1996.05a
• /
• pp.36-37
• /
• 1996

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2012.04a
• /
• pp.833-834
• /
• 2012

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1995.05a
• /
• pp.54-55
• /
• 1995

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1994.06a
• /
• pp.114-115
• /
• 1994

• 시스템엔지니어링워크숍
• /
• s.7
• /
• pp.5-9
• /
• 2006

• Proceedings of the KSR Conference
• /
• 2006.05b
• /
• pp.446-446
• /
• 2006

• Proceedings of the KSME Conference
• /
• 2007.05b
• /
• pp.2384-2389
• /
• 2007

The 2nd order response surface method (RSM) has been carried out to get optimum thermal design for enhanced heat transfer on square channel with bleed holes. The RSM was used as an optimization technique with Reynolds-averaged navier-stokes equation. Turbulence model for heat transfer analysis used RNG k-epsilon model. The wall function used enhanced wall function. Numerical local heat transfer coefficients were similar to the experimental tendency. Two design variables such as attack angle of rib (${\alpha}$), rib pitch-to-rib height ratio (p/e) were chosen. Operation condition considered bleeding ratio per bleed hole ($BR_{hole}$). A response surface were constructed by the design variables and operation condition. As a result, adjusted $R^2$ was more than 0.9. Optimization results of various objective function were similar to heat transfer in channel with and without bleed flow. But friction factor was lower than channel without bleed flow.

• Polymer(Korea)
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• v.32 no.4
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• pp.313-321
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• 2008

Acrylic pressure sensitive adhesive(PSA) was prepared by UV radiation curing and the peel energy and physical properties of PSA were investigated. The increase of amount of acrylic acid leads to improve the peel energy, associated with the substrate having smooth surface and high layer thickness. The high peel energy is obtained when the direction of irregularity in substrate is horizontal with the peeling direction. This is attributed to the increase of resistance to peeling in spite of decrease of wetting and the result corresponds to our supposition.