In the process of structural design of low pressure long blades of steam turbines, damped lacing structures are usually used to improve the strength and vibration characteristics of the blades. The presence of lacing can obstruct fluid flow within cas-cade channels, complex the flow field, cause loss of aerodynamic performance and reduced flow efficiency. This paper will take the low pressure long blade of industrial steam turbine as a model, analysis the aerodynamic performance with round lacing or not, study the influence range of aerodynamic performance caused by round Lacing.
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