排气蜗壳是连接燃气轮机末级涡轮与大气的关键部件，同时也是进一步提高动力装置输出功率最有潜力的部件之一，其与上游末级轴流涡轮因紧密耦合而产生的流动复杂性和非定常性可对涡轮和排气蜗壳的气动性能产生较大影响。国内外研究大多集中于单独的排气蜗壳性能和优化，而对排气蜗壳与轴流涡轮之间耦合的相互作用研究很少。本文主要从排气蜗壳内流动和损失机理、涡轮和排气蜗壳之间流动的相互作用以及排气蜗壳和轴流涡轮耦合的数值研究方法等方面对排气蜗壳内部流场分布及其与轴流涡轮流动相互作用的气动性能研究进展进行综述，重点梳理了二者流动的相互作用以及相关研究方法。最后，对排气蜗壳与轴流涡轮气动性能耦合研究的未来研究重点和发展趋势进行了展望。

As a key component which connecting the last stage turbine of gas turbine to the atmosphere,also one of the most potential units for further improving the output power of the power plant,exhaust volute is closely coupled to the axial turbine.This coupled flow field,which has a great impact on the aerodynamic performance of the turbine and the exhaust volute,is unsteady and complex.The research progress on aerodynamics performance of coupled axial turbine and exhaust volute over the past decades are reviewed in three aspects:flow mechanism and loss characteristics of exhaust volute,flow interaction between turbine and exhaust volute,and numerical research methods of coupled turbine and exhaust volute.The emphasis is placed on the turbineexhaust volute interactions and research methodology.Furthermore,the key trends and future research priorities regarding coupled axial turbine and exhaust volute aerodynamics performance are briefly presented.

U664.131

国家自然科学基金(51979052)；哈尔滨工程大学中央高校基本科研业务费专项基金（3072020CFT0304）；黑龙江省自然科学基金优秀青年项目（YQ2020E024）；国家科技重大专项（J2019-Ⅱ-0009-0029）