CAJ | 학술논문

喷嘴室是汽轮机中的关键部件，在汽轮机喷嘴室的设计过程中，必须分析其温度场。针对某亚临界600MW汽轮机喷嘴室，建立了三维有限元模型，介绍了喷嘴室表面不同区域的对流换热系数计算方法，用有限元法分析了喷嘴室的三维瞬态温度场，得出了在冷态启动运行工况的详细温度分布。结果表明，喷嘴室开启的室和关闭的室温度分布不同，对于开启的室，内表面的温度明显高于其它表面，内缸和喷嘴室支承键的接触表面处温度最低。所采用的分析方法可以用于分析亚临界、超临界和超超临界汽轮机喷嘴室，为喷嘴室的冷却设计和寿命评估打下了基础。
분취실시기륜궤중적관건부건，재기륜궤분취실적설계과정중，필수분석기온도장。침대모아림계600MW기륜궤분취실，건립료삼유유한원모형，개소료분취실표면불동구역적대류환열계수계산방법，용유한원법분석료분취실적삼유순태온도장，득출료재랭태계동운행공황적상세온도분포。결과표명，분취실개계적실화관폐적실온도분포불동，대우개계적실，내표면적온도명현고우기타표면，내항화분취실지승건적접촉표면처온도최저。소채용적분석방법가이용우분석아림계、초림계화초초림계기륜궤분취실，위분취실적냉각설계화수명평고타하료기출。
Nozzle chamber is one of the key components in steam turbine , the analysis of the temperature field is important when nozzle chamber of steam turbine is designed .Aim at a 600MW sub-critical steam turbine nozzle chamber , a three-dimensional finite element model of the nozzle chamber is developed , methods for calculating the convective heat transfer coefficients of the nozzle chamber surfaces different regions are described , three-dimensional transient thermal analysis is performed on the nozzle chamber by using finite element method .Detailed temperature distributions are determined during the cold start transient operating conditions .The results show that temperature distributions of the active chambers and those of the inactive chambers are different , inner surface temperature is higher than other surfaces temperature for the active chambers, temperatures of the contact surfaces between the inner casing and the support lugs on the nozzle chamber are lowest.The used analytic methods can be applied for temperature field analysis of sub-critical, supercritical and ultra-supercritical steam turbine nozzle chamber , a basis for the cooling design and the life evaluation of steam turbine nozzle chamber is provided .