某燃气轮机压气机过渡段优化设计及试验验证  

Optimization Design and Experimental Verification of a Gas Turbine Compressor Transition Section

作　　者：汪作心 酒鸣慧 徐宁 顾佳奇 WANG Zuoxin;JIU Minghui;XU Ning;GU Jiaqi(No.703 Research Institute of CSSC,Harbin,China,150078;Wuxi Branch of No.703 Research Institute of CSSC,Wuxi,China,214151)

机构地区：[1]中国船舶集团有限公司第七〇三研究所,黑龙江哈尔滨150078 [2]中国船舶集团有限公司第七〇三研究所无锡分部,江苏无锡214151

出　　处：《热能动力工程》2024年第12期1-9,共9页Journal of Engineering for Thermal Energy and Power

基　　金：船舶动力基础科研项目(MPRD-20220101)。

摘　　要：某燃气轮机整机试验过程中,压气机部分存在高压压气机效率偏低的问题,且高、低压压气机压比与设计值都存在偏差。经分析,低压压气机与高压压气机径向落差大,导致中间的过渡段内总压损失较大,进一步导致高压压气机进口流场品质较差,高压压气机效率降低。针对该情况,将过渡段内、外壁型线参数化,用两段四次曲线表示,在大范围内寻优,同时优化支板结构,进一步降低气流流动分离,最终确定优化方案。经流场分析发现,过渡段内壁面逆压力梯度流动会影响壁面边界层的发展,导致局部流动分离,引起较强的径向掺混,导致过渡段内总压损失。优化方案通过将逆压流动位置前移进行流动控制,降低总压损失。为验证方案的有效性,针对改进方案进行了吹风试验。结果表明:改型过渡段内的流动总压损失降低至原来的18%,优化方案极大地改善了过渡段内的流动分离情况。During the testing process of a gas turbine,high-pressure compressor has low efficiency,and there is a deviation between the pressure ratio and the design value of high and low compressors.After analysis,the large radial drop between the low-pressure and high-pressure compressor leads to significant total pressure loss in the intermediate transition section,further leading to poor quality of the inlet flow field of the high-pressure compressor,which may be the main reason for the low efficiency of the highpressure compressor.In view to this situation,the inner and outer wall profiles of the transition section are parameterized and represented by two quartic curves to seek optimization over a large range.At the same time,the support plate structure is optimized to further reduce airflow separation,and the optimization plan is ultimately determined.Through flow field analysis,it is found that the adverse pressure gradient flow on the inner wall of the transition section will affect the development of the wall boundary layer,leading to local flow separation and strong radial mixing,which is the main reason for the total pressure loss in the transition section.The optimization scheme controls the flow by moving the adverse pressure gradient flow position forward to reduce the total pressure loss.To verify the effectiveness of the scheme,

关 键 词：过渡段 参数化 优化方案 逆压流动 总压损失 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]