【正文】
管的接觸換熱面很小 ,換熱量也就小。 2 數(shù)值模擬結(jié)果及分析 壓力場分布 流場內(nèi)壓力分布如圖 2 所示 。 壓力 速度耦合采用 SIMPLE 算法 。 s) ;比熱為 4 182 J / ( kg 計(jì)算 參數(shù) 設(shè)置 圖 1 中管內(nèi)熱流體溫度為 400 K,管 外冷流體為溫度為 300 K 的水 。其不同的排列方式見下圖 1。由于生產(chǎn)規(guī)模、物料的性質(zhì)、傳熱的要求等各不相同,故換熱器的類型也是多種多樣。tube bundle。管束 。 關(guān)鍵字: 換熱器 。Zhengzhou University,Zhengzhou 450001, Henan, china) Abtract:This paper establishes four different models about the arrangement of the tube bundle,and using the software of Fluent,the numerical simulation of the twodimensional pressure,speed and temperature fields is puted by choosing the different arrangements of the tube bundle in the shellandtube heat loss, distributions of velocity and effect of heat transfer are pared and analyzed,moreover,a prehensive description of their strengths and weaknesses. Reference information for the improvement of the heat exchanger can be obtained by the ana