CAJ | 학술논문

采用三维黏性非定常数值模拟方法对某高压涡轮两级的内部流场进行了计算，并分析了该涡轮第一级内主要集中涡系结构---通道涡、壁角涡、泄漏涡的非定常发展规律。结果表明，静叶喉部位置后轴向与径向压力受到动叶前缘的干涉效应，使得静叶出口涡量大小呈明显的周期性变化；动叶内通道涡因为受到了来流附面层，以及上游静叶的集中涡系的影响，存在很强的非定常性。研究结果将有助于提高对涡轮内部动静叶非定常干涉的认识。
채용삼유점성비정상수치모의방법대모고압와륜량급적내부류장진행료계산，병분석료해와륜제일급내주요집중와계결구---통도와、벽각와、설루와적비정상발전규률。결과표명，정협후부위치후축향여경향압력수도동협전연적간섭효응，사득정협출구와량대소정명현적주기성변화；동협내통도와인위수도료래류부면층，이급상유정협적집중와계적영향，존재흔강적비정상성。연구결과장유조우제고대와륜내부동정협비정상간섭적인식。
Numerical simulations on the unsteady flow in two stages of a HP turbine are performed in this paper , the development of the main vortex system-passage vortex ,Wall corner vortex ,tip leakage vortex with the time are discussed in the first stage .The results show that because the axial pressure and radial thrust of the static blade throat is influenced by rotor-stator interaction from downstream rotor ,the vorticity of stator outlet present a cyclical change;and the passage vortex in the rotor is influenced by flow boundary layer and the vortices from upstream show a strong unsteadiness .These increased the knowledge of the R/S interaction in turbine stage .