CAJ | 학술논문

对某超超临界机组汽轮机配进汽室的调节级进行三维全周定常数值模拟,提取动叶壁面各个节点的静压力,编写插值程序将动叶壁面静压力通过逐点插值的方式施加于叶片有限元模型中,计算调节级在调节阀4阀和1阀全开2种工况下的叶片汽流弯应力.结果表明：2种工况下动叶壁面的最大静压力分别为22．64、17．76 MPa,位于叶片进汽边,静叶壁面的最大静压力分别为23．93、23．95 MPa；1阀全开工况的最大汽流弯应力约为4阀全开工况的10倍.
대모초초림계궤조기륜궤배진기실적조절급진행삼유전주정상수치모의,제취동협벽면각개절점적정압력,편사삽치정서장동협벽면정압력통과축점삽치적방식시가우협편유한원모형중,계산조절급재조절벌4벌화1벌전개2충공황하적협편기류만응력.결과표명：2충공황하동협벽면적최대정압력분별위22．64、17．76 MPa,위우협편진기변,정협벽면적최대정압력분별위23．93、23．95 MPa；1벌전개공황적최대기류만응력약위4벌전개공황적10배.
Accurate calculation of steam bending stress on control stage blade has important guiding signifi-cance to development of efficient and reliable control stage blades.Numerical simulation on 3D steady flow of a control stage blade with admission chamber in an ultra supercritical unit steam turbine was conducted, and the node steam force on the surface was extracted.Furthermore,interpolation procedures were com-piled to transform the node steam force to the node force applied in the blade finite element model,and the steam bending stresses under conditions of 4 valves open and 1 valve open were calculated.The results show that,the maximum static pressure on the rotor blade surface under the above two conditions was 22. 65 MPa and 17.76 MPa,respectively;the maximum static pressure on the stationary blade surface was 23. 93 MPa and 23.95 MPa,respectively;the maximum steam bending stress under 1 valve open condition was about 10 times larger than that under the 4 valves open condition.