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本文根据十种椭圆矩形翅片管束的放热和阻力性能的试验数据,用线性回归分析和F水平显著性检验方法求得了椭圆矩形翅片管束的气侧放热和阻力性能的关联式 NuPr~(1/3)=0.09N~(0.093)Re~(0.557)[(S_1-d_(r,t))/d_(r,t)]~(1.07t)[(S_1-d_(r,t)/(S_2-d_(r,t))]~(-0.364) f=2.95N~(0.173)Re~(-0.244)[(S_1-d_(r,t))/(S_2-d_(r,t))]~(-0.15r) 本文还据此确定了这类管束分别在最小容积和最小迎风面积标准下相应的最佳横向管间距和纵向管间距。最后,将本文求得的二种“最佳”结构换热器与某种等间距结构(S_1=S_2=0.0605m)换热器进行综合性能比较,得出了对设计具有一定参考价值的结论。
Based on the experimental data of the exothermic and resistive properties of ten elliptical rectangular finned tube bundles, the correlations between the exothermic and resistive properties of the gas side of elliptical rectangular finned tube bundles were obtained by linear regression analysis and F-level significance test. (1/3) = 0.09N ~ (0.093) Re ~ (0.557) [(S_1-d_ (r, t)) / d_ (r, t)] ~ 1.07t [(S_1-d_ (r, t ) / (S_2-d_ (r, t))] ~ (-0.364) f = 2.95N ~ (0.173) Re ~ (-0.244) [(S_1 -d_ (r, t)) / (S_2 -d_ , t)) ~ (-0.15r) In this paper, we also determine the optimal transverse tube spacing and longitudinal tube spacing for this type of tube bundles respectively under the minimum volume and the minimum windward area standard.Finally, The results show that the heat exchanger with the “best” structure is compared with the heat exchanger with some equally spaced structures (S_1 = S_2 = 0.0605m), and the conclusion is drawn that it has certain reference value to the design.