| Title |
Shape Optimization of Internally Finned Tube with Helix Angle |
| Authors |
김양현(Yang Hyun Kim) ; 하옥남(Ok Nam Ha) ; 이주희(Juhee Lee) ; 박경우(Kyoungwoo Park) |
| Keywords |
내부휜이 부착된 관 ; 나선형 각 ; 주기적 열/유동장 ; 다목적 유전 알고리즘 ; 파레토 집합 Internally finned tube ; Helix angle ; Periodic flow/ thermal field ; Multi-objective genetic algorithm ; Pareto set |
| Abstract |
The Optimal solutions of the design variables in internally finned tubes have been obtained for three-dimensional periodically fully developed turbulent flow and heat transfer. For a trapezoidal fin profile, performances of the heat exchanger are determined by considering the heat transfer rate and pressure drop, simultaneously, that are interdependent quantities. Therefore, Pareto frontier sets of a heat exchanger can be acquired by integrating CFD and a multi-objective optimization technique. The optimal values of fin widths (d₁, d₂), fin height(h) and helix angle() are numerically obtained by minimizing the pressure loss and maximizing the heat transfer rate within ranges of d₁=0.5～1.5mm, d₂=0.5～1.5mm, h=0.5～1.5mm, and =0～20o. For this, a general CFD code and a global genetic algorithm(GA) are used. The Pareto sets of the optimal solutions can be acquired after 30th generation |