CAJ | 학술논문

基于叶片式水力机械工作原理，设计出一种卧式双流道混流式水力透平机。为了对其结构进行优化，保证性能，使水能回收效率最大化，基于Navier—Stokes方程和标准的κ-ε双方程紊流模型，采用贴体坐标、非结构化四面体网格和SIMPLEC算法，对无导叶和有导叶的透平机在清水介质下的内部流场进行三维湍流数值模拟计算。研究结果表明：有导叶的水力透平机转轮叶片进口处速度环量、压力分布、叶片上的速度与压力分布以及吸出管内的流动状态都要优于无导叶的水力透平机，从而增加了转轮的能量转换指数。模拟结果为进一步研究能量回收透平机的结构提供了理论依据和实际应用参考。
기우협편식수력궤계공작원리，설계출일충와식쌍류도혼류식수력투평궤。위료대기결구진행우화，보증성능，사수능회수효솔최대화，기우Navier—Stokes방정화표준적κ-ε쌍방정문류모형，채용첩체좌표、비결구화사면체망격화SIMPLEC산법，대무도협화유도협적투평궤재청수개질하적내부류장진행삼유단류수치모의계산。연구결과표명：유도협적수력투평궤전륜협편진구처속도배량、압력분포、협편상적속도여압력분포이급흡출관내적류동상태도요우우무도협적수력투평궤，종이증가료전륜적능량전환지수。모의결과위진일보연구능량회수투평궤적결구제공료이론의거화실제응용삼고。
A type of horizontal double-channel francis hydraulic turbine was designed based on the working principle of vane hydraulic machinery. In order to optimize its structure, ensure the performances and maximize the efficiency of water-power recovery, a three-dimentional tubulence numerical simulation was performed for the inner flow field of the turbine with and without guide vanes under clear water medium, based on the Navier-Stokes equation and the standard two-equation turbulent model of κ-ε, using the body-fitted coordinates, unstructured-tetrahedron grid and SIMPLEC algorithm. The research indicates that compared to the turbines without guide vanes,the velocity circulation and pressure distribution in the runner＇s blade inlet, the velocity and pressure distribution in the blade surface and the internal flow state of the draft tube are more uniformity when the guide vanes exist,which increases the energy conversion index of the runner and provides a theoretical and practical reference for the further researches on the structure of energy recovery turbines.