动力涡轮整体三维流场分析和验证  

Three-dimensional pneumatic analysis and validation of a power turbine

作　　者：梁晨[1] 牛夕莹[1] 林枫[1] 王林[1] 

机构地区：[1]中国船舶重工集团公司第七○三研究所,黑龙江哈尔滨150036

出　　处：《舰船科学技术》2010年第8期92-97,共6页Ship Science and Technology

摘　　要：针对某燃气轮机四级动力涡轮采用NUMECA商业软件进行了三维黏性流场计算分析。并根据燃气轮机性能试验,提取动力涡轮特性参数,将计算得到的动力涡轮总体参数与试验得到的涡轮总体参数进行对比分析。发现其导叶采用了"后部加载"叶型及凹壁扩张与凸壁扩张相结合的子午型面技术,使其具有优良的气动性能。为分析叶冠对涡轮性能的影响,结合NUMECA软件特点,提出分块生成网格的方法,进行了单级涡轮带冠流场计算,并结合ASME的相关资料对其进行了分析。通过相关资料的分析,发现该涡轮导叶的"后部加载"特性尚不是太明显,其"后部加载"特性还有进一步"提升"的余地。为此,对涡轮第二级导叶进行了优化设计,优化后效率绝对值提高约0.5%,说明该涡轮效率还有一定的提升余地。The present paper simulated the three-dimensional flow field of a power turbine using NUMECA software.According to the gas turbine performance test,and by compared with the computational result,they are in good agreement with each other.The result indicate that this power turbine used aft-load blade profile and concavo-convex meridianal passage,that＇s why it＇s performance parameter is perfect.In order to learn about the effect of shroud to turbine,and combined with NUMECA software＇s characteristic,here bring forward using block grid to simulate,then one stage simulation is done.Moreover,by comparing with advanced aft-load blade profile,the stator＇s aft-load can reach a higher level.Because of that,in the present paper optimization is done to re-blade the profile,the result indicate that the efficiency improved 0.5%,which means the performance of this turbine can arrive higher standard.

关 键 词：动力涡轮 三维黏性流场 后部加载叶型 叶冠 

分 类 号：TK474.7[动力工程及工程热物理—动力机械及工程]