在恒热流边界条件和不同平行风风速下,考虑通过保温层和腔体壁面的导热热损失,采用三维数值模拟方法对一侧全开的圆柱形腔体复合对流和辐射热损失特性进行研究.结果表明:平行风下,腔体内的温度分布和开口面速度分布都与无风时存在很大差异;随着风速的增大,对流热损失平均努塞尔数Nuc单调递增,而辐射热损失平均努塞尔数Nur并不单调递减,且风速越大,变化越不明显;随着腔体倾角的增大,同一风速下Nuc和Nur并不像无风时那样单调变化.
参考文献
| [1] | Walid Chakroun .Effect of Boundary Wall Conditions on Heat Transfer for Fully Opened Tilted Cavity[J].Journal of heat transfer: Transactions of the ASME,2004(6):915-923. |
| [2] | Reddy K;Sendhil Kumar N .Convection and surface radiation heat losses from modified cavity receiver of solar parabolic dish collector with two-stage concentration[J].Heat and mass transfer,2009(3):363-373. |
| [3] | Convection heat loss from cavity receiver in parabolic dish solar thermal power system: A review[J].Solar Energy,2010(8):1342-1355. |
| [4] | A. K. A. Shati;S. G. Blakey;S. B. M. Beck .An empirical solution to turbulent natural convection and radiation heat transfer in square and rectangular enclosures[J].Applied thermal engineering: Design, processes, equipment, economics,2013(1/2):364-370. |
| [5] | Lan Xiao;Shuang-Ying Wu;You-Rong Li.Numerical study on combined free-forced convection heat loss of solar cavity receiver under wind environments[J].International Journal of Thermal Sciences,2012:182-194. |
| [6] | 关靖宇 .有无环境风条件下圆柱形腔体复合热损失特性实验研究[D].重庆大学,2013. |
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