基于新型氦气涡轮盘结构的传热特性及冷却机理研究

Research on Heat Transfer Characteristics and Cooling Mechanism Based on New Helium Turbine Disk Structure

针对氦气轮机的涡轮盘冷却问题,提出了一种新型折返式的冷却结构,并对该冷却结构下的涡轮盘冷却氦气流场和温度场进行流热固耦合分析。结果表明,这种新型结构能够充分利用低温氦气的温度梯度,在较小的冷氦气量的条件下能取得更好的冷却效果,涡轮各级轮盘的温度均降低到合适温度,可满足氦气轮机的工作需求。

The problem of turbine disc cooling in a helium turbine was addressed by proposing a novel cooling structure,followed by conducting fluid-thermo-solid interaction analysis to investigate the gas flow field and temperature distribution of the turbine disc under this cooling configuration.The results show that this innovative structure effectively utilizes the helium's temperature gradient,enhancing cooling performance even with a limited cold helium supply.Consequently,all levels of the turbine wheel disc can be maintained at an appropriate temperature to meet operational requirements for a helium turbine.