CAJ | 학술논문

适当改变动叶叶顶结构可有效改善轴流通风机的性能。以OB-84型动叶可调轴流风机为对象，采用Fluent对不同叶顶方案下的风机性能进行三维数值模拟，分析不同叶顶结构对间隙内部及其附近流场和损失分布的影响。研究表明：叶顶开槽长度、型式及开槽部位对风机性能均有明显影响，开槽后风机的全压均低于原风机，而效率却得到不同程度的提高；叶顶凹槽扰乱了间隙内流场涡量场的分布，阻碍了泄漏流的发展，削弱了泄漏流与主流的掺混，并使泄漏损失减少。总体而言，叶顶双凹槽下风机具有最优的气动性能，设计流量下风机效率提高了1.05个百分点。
괄당개변동협협정결구가유효개선축류통풍궤적성능。이OB-84형동협가조축류풍궤위대상，채용Fluent대불동협정방안하적풍궤성능진행삼유수치모의，분석불동협정결구대간극내부급기부근류장화손실분포적영향。연구표명：협정개조장도、형식급개조부위대풍궤성능균유명현영향，개조후풍궤적전압균저우원풍궤，이효솔각득도불동정도적제고；협정요조우란료간극내류장와량장적분포，조애료설루류적발전，삭약료설루류여주류적참혼，병사설루손실감소。총체이언，협정쌍요조하풍궤구유최우적기동성능，설계류량하풍궤효솔제고료1.05개백분점。
Appropriate change of rotor blade tip structure can improve the axial fan performance effectively. The performance of the axial fan of type OB-84 under different grooved blade tips was simulated with Fluent, and the effects of diverse blade structures on flow field and the loss distribution near the blade tip clearance were investigated. Simulated results show that the length, morphology and location of the groove exert obvious influence on fan performance. The fan with grooved blade tips appears a certain level of decline in full pressure but a distinct improvement in efficiency. The grooves perturb the flow and vortex fields which impedes the development of the leakage flow and impairs the mixing loss between the leakage flow and mainstream. In addition, blade tip with double grooves presents the best aerodynamic performance with an increasing efficiency by 1.05 percent at rated flow rate.