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차경세(K.S.Cha),최종욱(J.W.Choi),김복석(B.S.Kim),박찬국(C.G.Park) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
In this study, the spray models incorporated into the GTT code were tested for sprays injected for sprays injected in quiescent, swirling gases and for the sprays impinging on a flat wall, and the validity of the models has been confirmed by comparing the calculated results with the experimental data. Using this code, the gas flow, spray behavior and fuel vapor distributions in the combustion chamber of a D.I engine have been numerically analyzed with respect to the constant injection pressure and the injection pressure varing with injection time.<br/>
차경세(K. S. Cha),최종욱(J. W. Choi),박찬국(C. G. Park) 한국전산유체공학회 2000 한국전산유체공학회지 Vol.5 No.1
In this study. the spray models incorporated into the GTT code were tested for sprays injected in quiescent, swirling gases and for the sprays impinging on a flat wall, and the validity of the models has been confirmed by comparing the calculated results with the experimental data. Using this code, the gas flow, spray behavior and fuel vapor distributions in the combustion chamber of a D.I engine have been numerically analyzed with respect to the constant injection pressure and the injection pressure varying with injection time.
[디젤엔진부문] 분사각 및 스월 변화에 따른 디젤분무의 특성에 관한 수치 해석
정훈(H.Jung),차경세(K.S.Cha),박찬국(C.G.Park) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1
In high-pressure diesel engine, the injected fuel spray impinges on the piston cavity surface due to the short distance between the injection nozzle and the cavity wall. The behavior of the impinging spray has the great influence on the dispersion of fuel, the evaporatioin, and the mixture formation process. In this study, the numerical simulation using the GTT code was performed to study the gas flows, the spray behaviors, and the fuel vapor distributions in the combustion of a OJ engine for variation of spray angle and swirl ratio.
분사각 및 스월 변화에 따른 디젤분무의 특성에 관한 수치 해석
정훈(H. Jung),차경세(K. S. Cha),박찬국(C. G. Park) 한국전산유체공학회 2000 한국전산유체공학회지 Vol.5 No.3
In high-pressure diesel engine, the injected fuel spray impinges on the piston cavity surface due to the short distance between the injection nozzle and the cavity wall. The behavior of the impinging spray has the great influence on the dispersion of fuel, the evaporatioin, and the mixture formation process. In this study, the numerical simulation using the GTT code was performed to study the gas flows, the spray behaviors, and the fuel vapor distributions in the combustion of a D.I engine for variation of spray angle and swirl ratio.
유한요소법을 이용한 순수 물의 상변화 과정에 대한 수치해석
홍영대(Y. D. Hong),차경세(K. S. Cha),서석진(S. J. Seo),박찬국(C. G Park) 한국전산유체공학회 2002 한국전산유체공학회지 Vol.7 No.4
The phase-change transformation processes are relevant in many engineering applications. In particular, this phenomenon plays an important role in the extraction and fabrication operations in the metallurgical industry- The control of the heat transfer and fluid flow patterns is important to achieve casting Quality and competitive production times. In the present study, a simple finite-element algorithm is developed for solid-liquid phase change problems. Natural convection in the liquid phase due to the temperature dependency of water density is considered by a numerical model. The predictions are compared with measurements by the particle image velocimetry(PIV). to show that the calculation results are in good agreement with the experiment results.