关键词:

空冷器, 椭圆管, 扰流孔, 表面传热系数, 流动阻力, 数值模拟

Abstract:

Numerical calculations have been performed to analyze the characteristics of air flow and heat transfer inside the wing tunnels of air cooler condenser used in power plant，the local heat transfer coefficient distributions on the surface of wings with and without interrupted holes are discussed.Parameters which could affect the airside flow and heat transfer performance have been optimized with system analysis，including the number，the dimension and the position of the interrupted holes.Numerical simulation results showed that the heat transfer coefficient and the flow resistance increase with the increase in the number of the interrupted holes，and the total heat exchange increases within a certain range.The heat transfer coefficient and the flow resistance increase with the increase in the dimension of the interrupted holes，however，the total heat exchange decreases .Relatively，the position of the interrupted holes has a less impact on the heat transfer coefficient and the flow resistance as compared with those of the number and the dimension of the interrupted holes.

Key words:

空冷器, 椭圆管, 扰流孔, 表面传热系数, 流动阻力, 数值模拟