The propulsion demands of high-speed naval vessels often rely on gas turbines, producing significant amount of power achieving thus high performance requirements. Gas turbines can be used either to provide purely mechanical propulsion, or alternatively to generate electricity, which is subsequently used by electric drives to propel the ship. However, the thermal efficiencies of gas turbines are lower than those of Diesel engines of similar power. In the context of improving the performance of existing marine gas turbines, it is proposed to enhance engine’s performance by integrating a pressure wave supercharger (or wave rotor), while keeping the basic components of the baseline engine unchanged. This article is an application of a method developed by the author for marine gas turbines with and without recuperator, [Fatsis 2019]. It is found that important benefits are obtained for the topped engines in comparison to the self-standing baseline engines. The wave rotor integration is more appropriate for engines with low compression ratios and high turbine inlet temperatures. Application of wave rotor technology to recuperated marine gas turbines shows efficiency gain exceeding 19% for all the compression ratio and turbine inlet temperatures examined.

Abbreviations: COGAS, Combined gas turbine and steam turbine; COGES, Combined gas turbine electric and steam; GTE, Gas turbine engines

高速海军舰艇的推进需求通常依赖于燃气轮机，产生大量动力来满足高性能要求。燃气轮机既可用于提供纯机械推进，也可用于发电，随后由电力驱动器用于推进船舶。但是，燃气轮机的热效率低于同等功率的柴油机。在提高现有船用燃气轮机性能的背景下，建议通过集成压力波增压器（或波转子）来提高发动机性能，同时保持基线发动机的基本部件不变。本文是作者针对带和不带换热器的船用燃气轮机开发的一种方法的应用，[Fatsis 2019]。发现与自立式基线发动机相比，顶部发动机获得了重要的好处。波转子集成更适合低压缩比和高涡轮入口温度的发动机。波浪转子技术在回收的船用燃气轮机上的应用表明，在所检查的所有压缩比和涡轮机入口温度下，效率增益超过 19%。

缩写： COGAS，联合燃气轮机和蒸汽轮机；COGES，联合燃气轮机电和蒸汽；GTE，燃气涡轮发动机