关键词: 舰船燃气轮机压气机;母型压气机;模化设计;数值模拟;性能分析

Abstract: The field of marine gas turbine has presented higher power gas turbine requirement in a major project. In order to design a compressor quickly in the design period， modeling design was done based on the existing model. First， the reasonable modeling point on the characteristic graph of the prototype compressor was chosen to determine the modeling ratio， and the blade and flow-path of the modeling compressor were obtained after capacity increase. When meshing， in order to get closer to the actual situation， the tip clearance， fillet， air-bleed hole， and comb seal were taken into account. By the full 3D numerical simulation of the modeling compressor， the results show that the design point targets meet the requirement. The surge margin of the modeling compressor is basically the same as that of the prototype compressor on off-design operating conditions. After modeling， the decrease of tip relative clearance leads to the mass-flow enlargement at the choking point but reduction at the stall point. At the same time， it leads to the surge margin enlargement at low speeds but reduction at high speeds. In general， modeling design inherits the excellent aerodynamic performance of the prototype compressor. The paper provides valuable experience for rapid and efficient development of new compressors.

Key words: Marine gas turbine compressor;Prototype compressor;Modeling design;Numerical simulation;Performance analysis