外文翻譯---軸流管殼式換熱器殼側(cè)流體進出口分布擋板的理論研究(存儲版)
【正文】 side fluid flow maldistribution can be improved quickly, on the other hand pressure drop of shellside be increased quickly at same time. So it is very important to develop the theoretical, numerical, and experimental investigation of fluid flow distributor of shellandtube heat exchanger . The purpose of this research program is to optimize structural parameter of heat exchanger, to improve shellside fluid flow maldistribution, toreduce shellside pressure drop , and to enhance overall heat transfer performance , by theoretical , numerical , and experimental investigation methods respectively. In this paper, it will introduce optimal mathematical model among the various structural parameters of heat exchanger by theoretical methods.1 Physical ModelThe overall shellside structural drawing and the position of fluid flow distributor of shellandtube heat exchanger with axial flow are shown as Fig. 1 (a) . Fig. 1 (b) is the sketch map of shellside flow distributor structure. In fact , it is easily to understand the fluid distributor structure as that is a specified punched ratio board punched many miniostioles on it from the Fig. 1 (b) . The purpose of theoretical investigation is to found a mathematical model which brings out the optimal punched ratio of distributor as a function of parameter of heat exchanger. The main aspects affecting the fluid flow distribution of shellside are shown as follows: (1) punched ratio of distributor 。 Energy Conservation of the Ministry of Education , South China University of Technology , Guangzhou 510640 ,China 。 (4) tube pitch 。隨著工業(yè)生產(chǎn)設(shè)備的規(guī)模變得越來越大，換熱器作為一種工業(yè)生產(chǎn)通用設(shè)備，還需要滿足工業(yè)生產(chǎn)過程的要求，以及換熱器傳熱能力越來越大。所以發(fā)展流體流動殼式換熱器管區(qū)理論，數(shù)值和實驗研究是非常重要的。（2）交叉管行。2 數(shù)學(xué)模型為了找到了理論方法，數(shù)學(xué)模型理論分析模型，必須首先建立如圖（3）所示。它差分方程x方向的壓力降，可表示為： （5）殼側(cè)的水力直徑，邊界條件是x = 0和Δp ( x) = 0，所以他的積分方程式（5）可以表示為： （6） （7） XZ方向的壓力降據(jù)當(dāng)?shù)亓髁糠植己土鲃拥牧黧w壓力降，由x方向轉(zhuǎn)到z方向，我們可以得到如下方程的局部壓力降： （8） Z坐標(biāo)的壓力降據(jù)當(dāng)?shù)氐牧黧w壓降通用公式，我們可以得到它的流體通過的小型分流器擋板孔當(dāng)?shù)貕航捣匠淘趜方向如下： （9） 同質(zhì)分配公式眾所周知的是，同源流體通過分流器可以通過機械擋板能量平衡方程推導(dǎo)出進口交叉出口段的流量分布情況。 （3）殼程壓力降的液體以交叉立方體的方式流出，為了減少壓力殼側(cè)流體下降必須減少交叉的行流。另一個方面是操作特性，如雷諾數(shù)可兌換當(dāng)?shù)貕航迪禂?shù)。（3）在x方向流體流量，如圖所示3所示。 管殼殼端配置與軸流式換熱器示意圖1為了表達研究的物理模型更簡潔，當(dāng)我們考慮到部分單位和其進口和出口唯一時，我們把它看作一個矩形熱處理軸流換熱器。圖1(b) 是殼側(cè)流分銷結(jié)構(gòu)圖。為了使流體流動同源分布，S. S. Mousavi , K. Hooman and L. Maharaj , J . Pocock , B. 。 軸向流。 structural optimization 。 2. The Chemistry and Materials Department ,Hengyang Normal University , Hengyang 421001 ,China)Abstract:Presents the theoretical investigation of fluid distributor in the region of inlet/ outlet of shellside of shellandtube heat exchanger with longitudinal flow in this paper . It is advanced the structural optimal mathematical model among the various structural parameters of shellside of heat exchanger. The model provides reference and direction not only for experimental and numerical investigation of this problem, but also for the other process with fluid distribution.Key words: shellandtube heat exchanger。 (5) tube outer diameter . Fig. 1 Schematic drawing of shell side configuration of shell and tubeheat exchangers with axial flowIn order to express t he researched physical model more concisely, it is be treated as a rectang
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