Numerical analysis has been carried out to investigate thermal characteristics for hydraulic system. Overall performance of hydraulic system is largely influenced by oil flow field with heat transfer. Especially thermal characteristics for operating conditions with high oil temperature caused by heavy load and continuous operation are dominant. Oil temperature variation with time in the system is predicted for various flow conditions. Local fluid flow fields at the pipelines, valves, and oil pump in the hydraulic system are considered with thermodynamic and transport properties such as density and viscosity. These results in the study can be applied to the optimal design of hydraulic system.

Abstract
 1. 서론
 2. 전산 해석 기법
  2.1 해석 모델
  2.2 지배방정식 및 경계조건
  2.3 격자계 및 수치해석 방법
 3. 결과 및 고찰
  3.1 오일유동장 내 온도 분포
  3.2 시간별 오일 온도 변화
 4. 결론
 후기
 참고문헌

• 최유현(에너지엔(주)) | Yu Hyun Choi
• 이상호(원광대학교 기계자동차공학부) | Sang Ho Lee 교신저자