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조윤정,김성현,이인화,김시욱,고문주,박성규,이범규 조선대학교 환경연구소 2000 環境硏究 Vol.16 No.1
Leaching and adsorption equilibria of Sr Chemical Species from the near field of a repository has been studied in solidified cement with Fe and oxidized Fe. The absorption percent, Ads %, and distribution coefficient, K_d were calculated using equilibrium concentration to predict the extent of leaching and adsorption. In the mixed aqueous solutions the Ads % increase as Cement(C)/Water(W) ratios increase and K_d was decreased for Sr. These behaviors were discussed by adsorption and equilibrium of spiked ions. Oxides Fe promoted adsorption of spiked ions, but pure Fe had no effect. E_h values were also estimated and discussed to elucidate oxidation-reduction environment of experimental system.
석탄가스 모델 가스터빈의 연소실 형상 변화에 따른 연소불안정 특성
윤규성(Gyu Seong Youn),송원준(Won Joon Song),차동진(Dong Jin Cha) 한국연소학회 2021 한국연소학회지 Vol.26 No.1
Combustion instability of a synthetic coal gas flame in a partially-premixed gas turbine combustor has been numerically studied by utilizing a lumped network code, OSCILOS. Both H₂ percentage of the coal gas consisting H₂ and CH₄ and the length of the combustor were varied in this study. A companion experimental data were borrowed and used for validating the numerical results. The predicted results reasonably agree well with the afore-mentioned experimental ones. It was found that the mode of the instability shifted to the higher mode when H₂ content of the gas became larger, and that the dominant frequency of the instability was reduced as the combustor was getting longer.