CAJ | 학술논문

对具有3.6%相对叶顶间隙的涡轮叶栅进行了壁面流动显示和三维流场数值模拟，分析了大叶顶间隙涡轮叶栅的壁面流动特点，从数值模拟上特别对尾缘附近的壁面流动结构进行了详细讨论。实验与计算结果表明叶栅尾缘附近的流动是非常复杂的，同时由于叶顶间隙的存在，上下尾缘附近的壁面流谱明显不同。
대구유3.6%상대협정간극적와륜협책진행료벽면류동현시화삼유류장수치모의，분석료대협정간극와륜협책적벽면류동특점，종수치모의상특별대미연부근적벽면류동결구진행료상세토론。실험여계산결과표명협책미연부근적류동시비상복잡적，동시유우협정간극적존재，상하미연부근적벽면류보명현불동。
By means of flow visualization on the wall surface and three dimensional flow field numerical simulation for the turbine cascade with 3.6% relative tip clearance, characteristics of the wall flow of the turbine cascade with large tip clearance is analyzed. The flow pattern on the wall surface near the trailing edge is especially discussed in detail by numerical simulation. Results of the experimental and numerical simulation show that the flow near the cascade trailing edge is very complex, and the wall flow patterns near the upper and down trailing edges are clearly different due to the influence of blade tip clearance.