CAJ | 학술논문

角区流动的现象普遍存在，其中角区流动分离是制约叶轮机性能提升的关键因素。针对抑制或消除角区分离情况，在简要回顾二面角原理的基础上，提出叶身／端壁融合技术（BlendedBlade-EndWall，BBEW），指出了其所包含的二面角原理的3种应用方式，并以NASA67号转子叶片为例，采用数值方法研究了应用第2种方式（即增大过渡曲面最小曲率半径方式）的改型效果。结果表明：采用二面角原理第2种应用方式的BBEW能够有效地减弱或消除高负荷叶片吸力面角区分离，进而明显改善了67号转子叶片性能，因此BBEW是抑制或消除角区分离的有效技术。
각구류동적현상보편존재，기중각구류동분리시제약협륜궤성능제승적관건인소。침대억제혹소제각구분리정황，재간요회고이면각원리적기출상，제출협신／단벽융합기술（BlendedBlade-EndWall，BBEW），지출료기소포함적이면각원리적3충응용방식，병이NASA67호전자협편위례，채용수치방법연구료응용제2충방식（즉증대과도곡면최소곡솔반경방식）적개형효과。결과표명：채용이면각원리제2충응용방식적BBEW능구유효지감약혹소제고부하협편흡력면각구분리，진이명현개선료67호전자협편성능，인차BBEW시억제혹소제각구분리적유효기술。
Comer flow was a common phenomenon, and comer flow separation was thekey factor to further improve the performance of turbomachinery. In order to suppress or eliminate the comer flow separation, Blended Blade and EndWall (BBEW) technique was proposed on basis of the principle of dihedral, which included the three ways of application. Taking NASA rotor balde 67 as an example, the improvement effect of the second way was investigated by numerical methods, which increased the minimum curvature radius of curved transition surface. The results show that the comer separation of the high load blale suction side can be efficiently suppressed and eliminated by the BBEW, and the performance of the rotor balde was improved obviously. Therefore, the BBEW technique is effective to suppress or eliminate the comer separation.