Wave rotors are rotating equipment designed to exchange energy between high and low enthalpy fluids by means of unsteady pressure waves. In ground power plants, they can be used as topping devices to existing gas turbines aiming to improve their performance characteristics. A four-port wave rotor is an attractive configuration to be integrated into the gas generator of a two-shaft gas turbine, typical for power generation and propulsion systems, by slightly modifying the architecture of existing engines. In particular, in the present article the wave rotor-topped engine utilizes the same compressor, combustion chamber and turbine inlet temperature of the baseline engine. Cycle analysis for two-shaft gas turbine engines topped with four-port wave rotors is studied and their performance at design point is compared to the performance of the baseline engines accordingly. It is concluded that important benefits are obtained with respect to the ones of the baseline engines in terms of specific work and specific fuel consumption. Furthermore calculations by varying the pressure ratio within the wave rotor and the pressure losses in the ducts connecting the wave rotor to the engine's components indicate the effect on performance, for engines with different compressor pressure ratios and turbine inlet temperatures.

波浪转子是一种旋转设备，旨在通过不稳定的压力波在高焓和低焓流体之间交换能量。在地面电站中，它们可以用作现有燃气轮机的打顶设备，以改善其性能特征。四端口波状转子是一种有吸引力的配置，可以通过稍微修改现有发动机的结构，将其集成到典型用于发电和推进系统的两轴燃气轮机的气体发生器中。特别地，在本文中，波浪转子式发动机利用与基准发动机相同的压缩机，燃烧室和涡轮进口温度。研究了带有四端口波状转子的两轴燃气涡轮发动机的循环分析，并将其在设计时的性能与基准发动机的性能进行了比较。结论是，就特定工作和特定燃料消耗而言，相对于基准发动机而言，可获得重要的收益。此外，对于具有不同压缩机压力比和涡轮进口温度的发动机，通过改变波浪转子内的压力比以及将波浪转子与发动机组件连接的管道中的压力损失来进行计算，可以表明对性能的影响。