수직원형관내 초임계압 물의 난류 열전달에 관한 직접수치모사

다국어 초록 (Multilingual Abstract)

Turbulent flow and heat transfer to water at supercritical pressure flowing in vertical pipes is investigated using direct numerical simulation (DNS). A conservative space-time discretization scheme for variabledensity flows at low Mach numbers is adopted in the present study to treat steep variations of fluid properties at supercritical pressure just above the thermodynamic critical point. The fluid properties at these conditions are obtained using PROPATH and used in the form of tables in the simulations. The buoyancy influence induced by strong variation of density across the pseudo-critical temperature proved to play an important role in turbulent flow and heat transfer at supercritical state. Depending on the degree of buoyancy influence, turbulent heat transfer may be enhanced or significantly deteriorated, resulting in local hot spots along the heated surface.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 수치해석방법
• 3. 결과 및 토의
• 4. 결론
• 후기
• 참고문헌