Multilevel Optimization of the Semi-Open Impeller in a Centrifugal Pump
Ładowanie...
Data
2011
Autorzy
Tytuł czasopisma
ISSN czasopisma
Tytuł tomu
Wydawca
Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki Łódzkiej
Lodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering
Lodz University of Technology Press ; Department Division of Dynamics - Faculty of Mechanical Engineering
Abstrakt
Full optimization task for the case of the semi-open impeller with straight blades, requires
description of its' geometry by means of, at least, eighteen design variables. In the case
of constant meridional cross-section, are required at least eight design variables. Solution
of the task with such great vector of design variables requires much more time. One way
to manage to obtain a solutions with great variety of design variables is comprehensive
approach to the task depending on the partition into minor subtasks.
After decomposing the optimization task, one should choose procedure of solving
it. One of these procedures is parametric optimization, which is two-stage method of
minimizing (maximizing). This optimization is carried on in two levels. On a lower level,
multi-optimization of decomposed parts of the tasks, depending on design variables, is
being held. The solution of the lower level is used in an upper level (coordinating level)
to find optimal coordination variables.
It has been shown that result of multilevel optimization and full task optimization
is the same in limits of accepted accuracy of the objective functions' calculus. Time
of the calculation for the multilevel optimization task is over four times shorter than
undecomposed task time.
Opis
Słowa kluczowe
semi-open impeller, multilevel optimization, wirnik półotwarty, optymalizacja wielopoziomowa
Cytowanie
Mechanics and Mechanical Engineering, Vol. 15, No. 3, 2011, s. 319-332