摘要
采用商用化计算流体软件CFX对某汽轮机低压缸末三级和排汽缸的耦合流道进行数值模拟,获得不同质量流量下的内部流动数据。在25%设计流量下,叶片受到两种形式的气动激励。通过非定常的数值模拟,验证了整圈定常计算对非定常汽流力的预测能力以及气动激励的存在形式。
The flow field in a low pressure steam turbine including its last three stages and exhaust hood was simulated by using commercial CFD software CFX. Under 25% flow rate, the last stage rotor blades suffer from two forms of aerodynamic excitation that are verified in unsteady calculation. It is also demonstrated that the aerodynamic .excitations exist in last stage rotor which can be predicted by steady calculation in annuals model.
出处
《热力透平》
2015年第2期110-113,共4页
Thermal Turbine
基金
上海市科学技术委员会资助项目(13XD1422400)
关键词
汽轮机
低压缸
末级流动
变工况
气动激励
steam turbine
LP cylinder
last stage flow
off-design conditions
excitation
