Numerical Simulation on Ice Shedding Phenomena in Turbomachinery
Numerical Simulation on Ice Shedding Phenomena in Turbomachinery
复制标题
DOI：
10.1115/gt2014-25839
复制
发表时间：
2014-06
期刊：
影响因子：
--
通讯作者：
R. Hayashi;M. Yamamoto
中科院分区：
文献类型：
--
作者：
R. Hayashi;M. Yamamoto
在喷气发动机中，结冰现象主要发生在风扇叶片、风扇出口导叶、分离器和低压压气机上。积聚的冰扰乱了入口气流，造成了巨大的能量损失。此外，由于离心力，积聚在风扇转子上的冰可能会从叶片表面脱落，并可能损坏压缩机部件。这种现象，这是典型的涡轮机械，被称为冰脱落。虽然现有的结冰模式可以模拟冰的增长，但这些模式没有能力重现冰的脱落。在本研究中，我们建立了一个考虑冰生长和冰脱落的结冰模型。此外，我们还通过冰生长导致的流量损失和冰脱落导致的流量恢复的数值结果与实验数据的对比验证了所提出的冰脱落模型。对冰脱落发生时间的模拟结果和所提出的冰脱落模型的模拟结果与实验结果吻合较好。
In the jet engine, icing phenomena occur primarily on the fan blades, the FEGVs (fan exit guide vanes), the splitter, and the low-pressure compressor. Accreted ice disturbs the inlet flow and causes large energy losses. In addition, ice accreted on a fan rotor can be shed from the blade surface due to centrifugal force and can damage compressor components. This phenomenon, which is typical in turbomachinery, is referred to as ice shedding. Although existing icing models can simulate ice growth, these models do not have the capability to reproduce ice shedding. In the present study, we develop an icing model that takes into account both ice growth and ice shedding. Furthermore, we have validated the proposed ice shedding model through the comparison of numerical results and experimental data, which include the flow rate loss due to ice growth and the flow rate recovery due to ice shedding. The simulation results for the time at which ice shedding occurred and what were obtained using the proposed ice shedding model were in good agreement with the experimental results.