为了揭示展弦比对压气机跨声速级气动性能的影响机理，进一步提高舰船燃气轮机低压压气机的气动性能，采用数值模拟方法研究了展弦比对某船用燃气轮机低压压气机跨声速级气动性能的影响。结果表明:展弦比对压气机性能的影响受到扭曲规律和反动度等参数选择的影响，对于不同的扭曲方式和反动度分别存在着效率最优展弦比和喘振裕度最优展弦比，且在典型的船用燃气轮机压气机的负荷水平下，效率最优展弦比要大于喘振裕度最优展弦比，通过数值模拟手段和线性回归方法在一定范围内给出了其定量的关系。

In order to reveal the influence mechanism of aspect ratio on the aerodynamic performance of compressor transonic stage and further improve the aerodynamic performance of low pressure compressor of marine gas turbine,the impact of aspect ratio on transonic stage aerodynamic performance of a certain marine gas turbine low pressure compressor was studied by numerical simulation method.The results show that the influence of aspect ratio on compressor performance is influenced by the selection of parameters such as twisting law and reaction degree,etc.There are optimal aspect ratios of efficiency and surge margin for different torsion modes and reaction degrees respectively.And under the load level of typical marine gas turbine compressor,the optimal aspect ratio of efficiency is greater than that of surge margin.The quantitative relationship is given in a certain range by means of numerical simulation and linear regression.