航空发动机压气机叶片设计

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SoftInW ay, In c., 35 Corpo rate Dr., Burlington, MA 01803. Tel: (781)685-4942 TURBOMACHINERY DESIGN WITH AxSTREAM™

DESIGN OF THE 43.3" LSB

The Design of the Last Stage (L-0) of the steam turbine LP is a compromise between creating the

aerodynamically perfect set of blade profiles and making it fitted the requirements of durability and reliability. This takes a large amount of time and efforts, requires high skilled designers and is a real bottle-neck of a whole design process.

AxSTREAM ™ provides designers with the complex solution of gasdynamic / structural design and

optimization for L-0. Additionally, the airfoils profiling / stacking with regard to the stresses caused by the centrifugal forces and aerodynamic loads are performed.

The result of design with AxSTREAM ™ is a 3D model of blade surface and geometry representation suitable to immediate building the models for 3D CFD simulation with CFX and FLUENT.

The design capabilities provided by AxSTREAM ™ dramatically reduce time consumption for the L-0 stage design.

The link below leads to an example of AxSTREAM ™-aided design of the 43.31" blade (D/l = 2.37) at 3000rpm. The stage power is 19 MW, efficiency - 62 %.

Totally, the design procedure takes near 30 hours. At that, 12 hours have been spent on calculation and optimization of the stage with concern on the flow irregularity along the blade height, while the rest of time was dedicated to the airfoils profiling considering actual flow characteristics, stress distribution and smoothness of the blade surface.