A5041998882- Refrigeration and Air Conditioning Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Heat Transfer and Optimization
- Advanced Battery Technologies Research
- Adsorption and Cooling Systems
- Solar Thermal and Photovoltaic Systems
- Heat Transfer and Boiling Studies
- Engineering Applied Research
- Advanced Combustion Engine Technologies
- Building Energy and Comfort Optimization
- Vehicle emissions and performance
- Advanced Thermodynamic Systems and Engines
- Metallurgical Processes and Thermodynamics
- Heat Transfer Mechanisms
- Metal Alloys Wear and Properties
- Electric Vehicles and Infrastructure
- Integrated Energy Systems Optimization
- Iron and Steelmaking Processes
- Radiative Heat Transfer Studies
- Solar-Powered Water Purification Methods
- Phase Change Materials Research
- Electric and Hybrid Vehicle Technologies
- Membrane Separation Technologies
- Thermal Expansion and Ionic Conductivity
- High Entropy Alloys Studies
Purdue University West Lafayette
2023-2024
Chungnam National University
2024
Korea University
2017-2023
Korea Institute of Machinery and Materials
2012
Chonnam National University
2006
National University of Singapore
1991-1992
Today gasoline engines for vehicular application are not only faced with stringent emission regulation but also increasing requirements to better fuel economy, while guaranteeing power density. The spray-guided type direct injection (GDI) engine has an advantage of improved thermal efficiency and lower harmful emissions. Centrally mounted high pressure injector adjacent spark plug allow stable lean combustion due the flexible mixture stratification. In present study, performance emissions...
하드페이싱층과 기저부의 결합부에서 발생하는 잔류 응력/변형률을 감소시키기 위하여 열응력제어층에 대한 연구가 시작되고 있다. 이 연구에서는 3 차원 유한요소해석을 이용하여 Stellite21 초합금으로 하드페이싱된 STD61 열간금형강의 중간층으로 형성된 열응력제어층의 재료조합과 두께를 예측하고자 한다. 열응력제어층은 과 의 조합으로 생성하였다. 두께범위는 0.5-1.5 mm 로 선정하였다. 유한요소해석 결과를 열응력제어층을 구성하는 혼합율 및 열응력제어층 두께에 따른 시편 내부 온도/열응력/열변형률분포를 정량적으로 분석하였다. 결과로부터 적합한 재료혼합비는 50 % 와 이며, 적절한 두께는 1.0 임을 알 수 있었다.