Abstract: Forced convective heat transfer under steady flow in a helical recuperator is being studied, employing similanity principles. Water, glycerin-water solution and air are used separately as medium for heat transfer, and Convective heat-transfer coefficients are determined over a rather wide range of Dean number and Prandtl number. The correlations among Nusselt number, Dean number and Prandtl number are found by the least squares method: Nu = 1.2Dn0.53Pr0.29; Dn = 2250-16500, Pr=2.5-8.5 Nu = 0.23Dn0.64Pr1/3; Dn = 2900-9000, Pr=0.7 At the same time, the modified graphical method of wilson is used to determine the individual convective heat-transfer coefficients in the recuperator, and it is found results that they agree satisfactorily with experimental.

摘要： 本文在相似理论指导下研究了螺旋回热器稳定流动状态下的传热性能.分别用液体和空气作为传热介质,在比较大的Dn和Pr变化范围内测量了传热系数.用线性回归分析法关联出了Nu与Dn和Pr之间的准数方程.同时用修正的Wilson标绘法确定传热系数,获得了与测量结果比较满意的一致的结果.