http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
김신현(S. H. Kim),양시원(S. W. Yang),정승채(S. C. Jung),김민기(M. K. Kim),안철주(C. J. Ahn),윤지수(J. S. Yoon),윤영빈(Y. B. Yoon),윤삼손(S. S. Yoon),류시양(S. Y. Ryu) 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.5
Combustor development for industrial gas turbine requires extensive experience and massive resources. Due to a recent development of computing power, computational fluid dynamics (CFD) became one of main analysis tools for combustion research. In this paper, both experiment and numerical studies of a lean premixed combustor with an axial-type swirler were conducted. Flow field measurement using PIV was compared with CFD result with various turbulent models. Large eddy simulation (LES) with dynamic Smagorinsky model showed the highest accuracy in recirculation zone prediction. Flamelet progress variable (FPV) method was used to model partially premixed combustion. Reaction zones were visualized by OH concentration from experiment and LES calculation, and they showed good agreement. In addition to the flame shape, complex flow physics inside a lean premixed combustor was observed in LES result. Numerical approach described in this paper will be applied to design Samsung Techwins original combustors.
김용재(Y. J. Kim),강원구(W. G. Kang),김수겸(S. K. Kim),김지석(J. S. Kim),김준영(J. Y. Kim),신동준(D. J. Shin),윤삼손(S. S. Yoon),류시양(S. Y. Ryu) 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.5
The size of electronic devices is becoming miniaturized and performances are becoming more and more high function. So power consumption of the product is greatly increased. And, in the progress of product development, thermal design is a very important task. In the thermal design process, we need many climate chambers to measure temperature of electronic components and check operation of the products under cold and hot environments. However, the climate chamber needs expensive maintenance cost and occupies large space. This is a huge burden to the company. Most developers replace high-temperature tests by low cost room temperature tests. There is an issue how much value the developers add to the results of room temperature tests for converting to the results of high temperature tests. In this paper, some results based on tests and thermal simulation analyses have been reported to suggest the value.