Shabliy L.,Samara State Aerospace University |
Cherniaev A.,JSC CADFEM CIS
SIMULTECH 2014 - Proceedings of the 4th International Conference on Simulation and Modeling Methodologies, Technologies and Applications | Year: 2014
This article describes an approach for optimization of gas turbine compressor blade based on one-way fluidstructure interaction (FSI) analysis coupled with evolutionary optimization algorithm. Commercial CFD and FE code ANSYS was used for the simulations. Paper gives detailed description of developed geometric model, CFD and FE models, as well as description of employed optimization technique. Obtained results indicate that adiabatic efficiency and pressure rate of compressor can be increased up to 23% and 7% correspondingly by rational selection of relative positions of compressor blade cross-sections.
Tanchuk V.,D.V. Efremov Scientific Research Institute of Eelectrophysical Apparatus |
Grigoriev S.,D.V. Efremov Scientific Research Institute of Eelectrophysical Apparatus |
Lokiev V.,D.V. Efremov Scientific Research Institute of Eelectrophysical Apparatus |
Roshal A.,D.V. Efremov Scientific Research Institute of Eelectrophysical Apparatus |
And 2 more authors.
Fusion Engineering and Design | Year: 2015
The superconducting magnets of the ITER are capable of accumulating up to 50 GJ. In case of coil quench the energy stored in the coils must be extracted rapidly. The problem can be solved by the Fast Discharge Resistors (FDR) under development at the Efremov Institute. The fast discharge of the coils results in practically adiabatic heating of the resistive elements up to 250 °C. The resistors should be cooled to their initial temperature within a reasonable time (4-6 h). With this in mind, the authors have designed the cooling system based on natural air circulation. When performing the numerical analysis of the cooling process, the authors have faced the problem of the essential non-uniformity of air flow distribution in parallel channels, which considerably increases the cooling time. Thus, while the cooling time does not exceed 3 h for a single FDR module, it exceeds 10 h for several modules. The numerical studies performed over the last few years have allowed the authors to propose a number of measures to optimize the air cooling system so as to mitigate the negative effect of the air flow non-uniformity in the FDR cooling system. © 2015 Elsevier B.V. All rights reserved.