热能动力工程——信息动态专栏(英文)

Ultra-supercritical steam turbine Turbosets-Best efficiency solution for conventional steam power plants

(Continued from the previous issue)This clearly indicates that the overall loss can be most easily reduced by reducing the profile loss throughout the entire turbine.The secondary flow loss is of significance for those stages that are characterized by a low aspect ratio(ratio of blade height to blade chord),i.e.the front stages of the HP and IP turbine component.Leakage losses are relatively high in the admission sections to the HP and IP turbines.In general,the flow field in steam turbines is,at least to some extent,characterized by fully three-dimensional effects.This is particularly true for low aspect ratio turbines there the secondary flows generated close to the

This clearly indicates that the overall loss can be most easily reduced by reducing the profile loss throughout the entire turbine. The secondary flow loss is of significance for those stages that are characterized by a low aspect ratio （ ratio of blade height to blade chord）, i. e. the front stages of the HP and IP turbine component. Leakage los- ses are relatively high in the admission sections to the HP and IP turbines