本文選題：螺旋折流板換熱器 + 流固耦合　； 參考：《高校化學(xué)工程學(xué)報》2017年03期

【摘要】：針對螺旋折流板換熱器熱-結(jié)構(gòu)綜合性能,以螺旋角和搭接度為優(yōu)化變量,基于流固耦合理論,采用二階多項式響應(yīng)面模型和遺傳算法對螺旋折流板換熱器進(jìn)行了結(jié)構(gòu)優(yōu)化研究。結(jié)果表明:當(dāng)殼側(cè)入口流量為1.5 m×s~(-1)時,對于流動傳熱性能,單位壓降傳熱系數(shù)隨螺旋角的增大呈現(xiàn)先增大后減小的趨勢,隨搭接度的增大而減小,且受螺旋角的影響更大;對于折流板機械強度性能,最大剪應(yīng)力的最大值隨著螺旋角的增大而增大,而基本不受搭接度的影響。多目標(biāo)優(yōu)化以單位壓降傳熱系數(shù)最大化,最大剪應(yīng)力的最大值在許用應(yīng)力范圍內(nèi)且最小化為目標(biāo)函數(shù),得到了三種優(yōu)化結(jié)構(gòu)。對比優(yōu)化前后,單位壓降傳熱系數(shù)平均提升了14.1%,最大剪應(yīng)力的最大值平均降低了4.1%。研究結(jié)果為螺旋折流板換熱器的工業(yè)化設(shè)計提供了理論指導(dǎo)。
[Abstract]:Based on the theory of fluid-solid coupling, the helical angle and the degree of overlap are taken as the optimal variables for the thermal structure comprehensive performance of the helical baffle heat exchanger.The second order polynomial response surface model and genetic algorithm were used to optimize the structure of helical baffle heat exchanger.The results show that when the inlet flow rate of shell side is 1.5 m 脳 s-1), the heat transfer coefficient of unit pressure drop increases first and then decreases with the increase of spiral angle, and decreases with the increase of lap degree, and is more affected by spiral angle.For the mechanical strength of baffle plate, the maximum shear stress increases with the increase of spiral angle, but is not affected by the degree of overlap.In order to maximize the heat transfer coefficient per unit pressure drop, the maximum shear stress is minimized within the allowable stress range, and three kinds of optimization structures are obtained.Before and after optimization, the heat transfer coefficient per unit pressure drop increased by 14.1and the maximum shear stress decreased by 4.1.The results provide theoretical guidance for the industrial design of helical baffle heat exchangers.
【作者單位】： 西安交通大學(xué)化學(xué)工程與技術(shù)學(xué)院;西安交通大學(xué)能源與動力工程學(xué)院;
【基金】：國家自然科學(xué)基金(51676146)
【分類號】：TQ051.5
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本文編號：1735463