열간 공정 중 금속의 동적 연화 현상에 관한 연구

Thesis (docoral)--서울대학교 대학원 :기계항공공학부,2002.Docto

Numerical Simulation of Diesel Spray in Constant Volume Chamber using CMC Combustion Model

MasterA understanding of the dominant physical and chemical phenomena characterizing diesel spray combustion remains the fundamental prerequisite to improve present technology towards more efficient engines. To this end, fundamental studies at constant volume conditions are still essential to evaluate the effects of different fuels, ambient conditions and operating conditions on ambient composition, combustion processes. Engine Combustion Network (ECN) experimental data is useful to validate model implementation because of the wide range of conditions employed. To reduce mesh dependence, gas jet spray model is adopted and implemented into open source code. In this paper both non reacting and reacting condition for n-heptane were validated. The gas jet spray model verified with experimental data of liquid and vapor penetrations. The effects of various ambient oxygen concentration, density and temperature in a high pressure constant volume vessel were predicted. The combustion model is based on conditional moment closure(CMC) and compared with partially stirred reactor(PaSR). Sieser skeletal mechanism performs relatively better than Patel chemistry mechanism. Lift off length results show acceptable agreement in comparison with experimental value, while predicted ignition delay time shows acceptable trends

Studies on thermostable aldolases from Thermoplasma acidophilum

Maste

열간 정수압 압축을 받는 다공성 금속의 소성 거동 연구

학위논문(석사)--서울대학교 대학원 :기계설계학과,1996.Maste

OpenFOAM을 이용한 난류연소현상 해석 및 내연기관에의 적용

2

OpenFOAM을 이용한 내연기관과 가스터빈 연소기 시뮬레이션 해석

2