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冰脱落对电热除冰传热特性的影响是电热除冰过程中的重要特征。采用有限体积法和混合网格技术,基于热焓方法将传统的相变传热模型应用到电热除冰计算中,研究了冰脱落对电热除冰传热特性的影响,主要研究了加热模式和加热单元间隔对除冰结构传热特性的影响。研究发现:无间隔除冰单元是有间隔除冰单元的特殊情况,其蒙皮表面温度历程在本质上是一致的。冰脱落后,无间隔除冰单元蒙皮表面温度开始剧烈上升然后逐渐缓慢上升。而对于有间隔除冰单元,随着间隔上加热功率的降低,温升过程逐渐缓和。单元间隔的加热功率降低到一定程度时,表面温度出现温降过程。当传递到蒙皮表面的热量和对流换热带走的热量差逐渐趋于稳定时,表面温度又开始逐渐稳定的上升。
The influence of ice shedding on the heat transfer characteristics of electrothermal deicing is an important feature in the electrothermal deicing process. Based on the enthalpy method, a finite volume method and a mixed-meshes technique are applied to the traditional phase-change heat transfer model to the calculation of electrothermal de-icing. The influence of ice-off on the heat transfer characteristics of electrothermal de-icing is studied. The effects of heating mode and Effect of Heating Element Intervals on Heat Transfer Characteristics of Deicing Structure. It is found that the non-interval deicing unit is a special case with interval deicing unit, and the temperature history of the skin surface is essentially the same. After the ice falls off, the surface temperature of the skin of the de-icer unit begins to increase sharply and then slowly increases. As for the interval deicing unit, as the heating power decreases, the temperature rise gradually eases. When the heating power of the unit interval is reduced to a certain extent, the surface temperature shows a temperature drop process. When the heat transferred to the skin surface and the heat transfer away from the convective heat transfer gradually stabilized, the surface temperature began to gradually and steadily increase.