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철근이 부식된 철근콘크리트 슬래브의 구조성능 평가에 대한 실험적 연구
정은철 ( Jung¸ Eun-chul ),이경언 ( Lee¸ Kyoung-un ),정란 ( Chung¸ Lan ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2
With the exhaustion of river aggregate which have been used as main resource of aggregate, sea sand have been used. However sea sand without removal of salt cause corrosion of embedded. This study is aimed at providing the data for basic design data of corroded reinforced concrete by testing various corrosion level over 5% specimens.
Numerical Simulation of Transonic Flow through High Pressure Turbine Cascade
Mahmoud M. El-GENDI(엘긴디 마흐무드),Kyoung-Un Lee(이경언) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Steady flow simulations through a transonic turbine vanes were carried out for an isentropic Mach number of 1.02 and a Reynolds number of 10<SUP>6</SUP>. The main objective of the present study is to the effect of turbulence model on the steady flow in transonic regime. Three turbulence models were compared namely SST, k-ω, and ω Reynolds Stress(ωRS). Also, the laminar result was considered. The comparison was carried out on the whole computational domain with more emphasis on the Isentropic Mach number along the blade and total pressure loss at the wake. The turbulent results of all turbulent models have a reasonable agreement with experimental data along the blade surface. ωRS has the best agreement on the cascade exit.