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高负荷叶片和大焓降级的设计和应用可以有效地减少透平机械通流部分的级数和叶片只数,从而在保证气动效率和安全可靠条件下,有效地降低产品的开发设计制造成本,提高透平机械产品的竞争力。对透平机械高负荷叶片的研发和应用现状进行了综述,详细介绍了高负荷叶片的气动设计和气动性能的影响因素。结合燃气轮机大焓降级的特点,综述了高负荷叶片和大焓降级的型线设计和性能研究以及在汽轮机通流设计中的应用。论文最后对高负荷叶片和大焓降级在汽轮机通流设计中的应用前景和工作重点进行了展望。
The design and application of high-load blades and large-enthalpy degradation can effectively reduce the number of stages and the number of blades in the through-flow part of the turbine, thereby effectively reducing the cost of product development, design and manufacture under the conditions of ensuring aerodynamic efficiency and safety and reliability, Improve the competitiveness of turbine machinery products. The development and application of turbine mechanical high load blades are reviewed. The aerodynamic design and the factors of aerodynamic performance of high load turbine blades are introduced in detail. Combining with the characteristics of large enthalpy degradation of gas turbines, the design and performance of profile lines with high load shedding and enthalpy degradation and the application in steam turbine flow design are summarized. In the end, the prospect of the application of high-load blades and enthalpy downgrade in the design of steam turbine flow are forecasted.