CAJ | 학술논문

为了研究某潮汐电站开发的新型高效低水头大流量双向竖井贯流式水轮机的能量特性,进行了模型试验与数值模拟计算.在模型试验中测试了水轮机正反两向、不同叶片安放角、不同导叶开度下的水头、流量和扭矩等参数,绘制了水轮机模型综合特性曲线,并与数值模拟结果进行了对比.试验结果表明,水轮机额定工况下,正向效率可达89168%,反向效率可达84108%,满足该潮汐电站运行要求;数值模拟结果与试验结果吻合,验证了数值模拟的可靠性,同时通过将换算后的原型试验结果与 CFD数值模拟结果进行对比发现,在偏离设计工况点但是保持额定水头不变时,改变导叶开度引起的流量变化比改变叶片安放角引起的流量变化对数值模拟结果的偏差影响略大.
위료연구모조석전참개발적신형고효저수두대류량쌍향수정관류식수륜궤적능량특성,진행료모형시험여수치모의계산.재모형시험중측시료수륜궤정반량향、불동협편안방각、불동도협개도하적수두、류량화뉴구등삼수,회제료수륜궤모형종합특성곡선,병여수치모의결과진행료대비.시험결과표명,수륜궤액정공황하,정향효솔가체89168%,반향효솔가체84108%,만족해조석전참운행요구;수치모의결과여시험결과문합,험증료수치모의적가고성,동시통과장환산후적원형시험결과여 CFD수치모의결과진행대비발현,재편리설계공황점단시보지액정수두불변시,개변도협개도인기적류량변화비개변협편안방각인기적류량변화대수치모의결과적편차영향략대.
@@@@In order t o research the energy charact eristics of t he new t ype, high efficiency, low head, large discharge, bidirect ional shaft tubular turbine for a tidal pow er stat ion, the mode test and numerical simulation were employed. The parameters such as the head, discharge, and torque under different conditions of positive and negative direct ions, turbine blade angles, and guide vane openings of the shaft tubular turbine w ere determined and used to draw the synthetic characteristic curve of the turbine model, which was compared w ith the numerical simulation results. The test results indicated t hat the positive and reverse efficiency of the turbine can reach 89. 68% and 84. 08%, respectively under the standard running condit ions, w hich can sat isfy the operation requirements of t idal pow er station. The test results were similar to the numerical simulation results, w hich validated the relia2 bility of numerical simulation. In addition, comparing t he prototype test results and CFD numerical simulation result s, we found that when t he designed point is deviated but the rat ed head is the same, the discharge variation caused by the changing of the guide vane opening has more effect s on the numerical simulation result s than that caused by the changing of the blade angle.