An optimization model based on fuzzy theory was set up and the corresponding Interactive modified simplex (IMS) method was developed to solve it. Both static pressure recovery and total pressure loss were considered in the model. Computational fluid dynamics (CFD) method was applied to solve the Reynolds-Averaged Navier-Stokes equation (RANS) and to find flow field distribution to get the value of the object function. After receiving the new shroud curve, grid movement and redrawing technology were adopted to avoid grid-line crossing and negative cells. The shroud curve was fitted with B-spline. The optimized results concur with the results reported in references.
GAO Chuang, GU Chuangang, WANG Tong, SHU Xinwei
. Multi-objective optimization of a 3D vaneless
diffuser based on fuzzy theory[J]. Frontiers in Energy, 2008
, 2(1)
: 66
-70
.
DOI: 10.1007/s11708-008-0006-5
1. Dutton J C Piemsomboon P Jenkins P E Flow field and performance measurement in vaned radialdiffuserJournal of Fluid Engineering 1986 108(2)141147
2. Kammer N Rautenberg M A distinction between differenttypes of stall in a centrifugal compressor stageJournal of Engineering for Gas Turbine and Power 1986 108(1)8392
3. Bein T W Lee Y T Performance evaluation of anair conditioning compressor, Part1: Measurement and design modelingInternational Journal of Rotating Machinery 1986 5(4)231240
4. Lee Y T Bein T W Performance evaluation of anair conditioning compressor, Part2: Volute flow predictionInternational Journal of rotating machinery 1986 5(4)241250
5. Cabuk H Modi V Optimum plane diffusers inlaminar flowJournal of Fluid Mechanics 1992 237373393
6. Zhang J Chu C K Modi V Design of plane diffusers in turbulent flowInverse Problems in Engineering 1995 285102
7. Lim S Choi H Optimal shape design of a two-dimensionalasymmetrical diffuser in turbulent flowAIAA Journal 2004 42(6)11541169
8. Lee Y T Luo L Bein T W Direct method for optimization of centrifugal compressorvaneless diffuserJournal of Turbomachinery 2001 1237380
9. Gu C G Ji Y M Theoretical analysis of theoptimal shape for a two-dimensional diffuser with incompressible flowJournal of Mechanical Engineering 1990 26(2)7984 (in Chinese)