立式太阳能热气流电站双级涡轮机半径比研究  

Research on radius ratio of solar chimney power plant system with vertical collector double rotor turbine

作　　者：周艳[1] 郝凯[1] 杨晨 王震 Zhou Yan;Hao Kai;Yang Chen;Wang Zhen(School of Materials Science and Engineering,Qingdao University of Science ＆ Technology,Qingdao 266061,Shandong China)

机构地区：[1]青岛科技大学机电工程学院

出　　处：《华中科技大学学报（自然科学版）》2018年第8期39-44,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51176080)

摘　　要：基于空气涡轮机的Wilson设计理论及参数化设计理念,设计了一种应用于立式太阳能热气流电站中的双转子空气涡轮机.实验结果表明：半径比对该双转子空气涡轮机的输出功率影响较大;当双转子空气涡轮机半径比r/R为0.75左右时（r为第一级风轮半径,R为第二级风轮半径）,系统输出功率最大.据此采用数值模拟方法对半径比为0.65~0.85时空气涡轮机的性能进行了深入分析,结果表明：当r/R为0.65~0.85时,空气涡轮机的输出功率及两级转子前后的压力差均随半径比的升高先增大后减小,且当r/R为0.75时达到最大.此时,双转子空气涡轮机的叶片翼型周围速度场和压力场表明气动特性良好,且第一级转子叶片数目为7时,其输出功率比单转子空气涡轮机的输出功率提高了30%以上,能量转换效率大幅提高.Based on the Wilson design theory of air-turbine and parametric design,a double rotor air turbine applied to SCPPVC was designed.The experimental results shows that the radius ratio has a great influence on the dual rotor air turbine power output,and the maximum power output is obtained when the radius ratio r/R is about 0.75（r and R are the radius of the first and the second stage of the air turbine respectively）.On this ground,the performance of air turbine is deeply analyzed when the the radius ratio is 0.65~0.85 by numerical simulation.The results show that,both system power output and pressure difference between two-grade rotors increase firstly and then decease.When the radius ratio is 0.75,the two parameters of the air turbine reach peak.By the velocity and pressure field around blade airfoil of double rotor air turbine,it can obtain that the performance of the air turbine keeps good condition when the radius ratio is 0.75.The power output of the new air turbine has increased by 30% compared with single rotor one,when the radius ratio is 0.75 with 7 blades in the first grade rotor.Thus,the energy conversion has been improved effectively.

关 键 词：空气涡轮机 立式太阳能热气流电站 双转子 叶片 半径比 

分 类 号：TK14[动力工程及工程热物理—热能工程]