抄録
An optimization method for three-dimensional turbine blade
design including end wall contouring control with
non-axis-symmetric geometry has been developed. This design
optimization method consists of three-dimensional parametric
modeling module for blades and end walls, optimization algorithm
module and the design evaluation method using Computational
Fluid Dynamics code.
This paper presents the advanced and more applicative study to
enhance this optimization methodology from a single turbine stage
to two turbine stages with stator blade hub leakage and rotor blade
tip leakage influences.
Results of present fluid dynamic design optimization study with
consideration of tip and hub leakage show that the efficiency of the
current well designed high pressure steam turbine stage has been
enhanced by 0.21%. Using parallel optimization algorithm and a
cluster PC system, the design cycle can be shortened to seven days
for an optimization with one thousand iterations of two turbine
stage CFD on 20 CPUs of 2.0G cluster PC.
