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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Design optimization of laminar flow machine rotors based on the topological derivative concept

Texto completo
Autor(es):
Sa, L. F. N. [1] ; Novotny, A. A. [2] ; Romero, J. S. [3] ; Silva, E. C. N. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Mechatron & Mech Syst Engn, Escola Politecn, Ave Prof Mello Moraes, 2231, BR-05508030 Sao Paulo - Brazil
[2] MCT, LNCC, Ave Getulio Vargas 333, BR-25651075 Petropolis, RJ - Brazil
[3] Univ Fed Espirito Santo, Dept Mech Engn, Vitoria, ES - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION; v. 56, n. 5, p. 1013-1026, NOV 2017.
Citações Web of Science: 1
Resumo

Flow machines are very important to industry, being widely used on various processes. Thus, performance improvements are relevant and can be achieved by using topology optimization methods. In particular, this work aims to develop a topological derivative formulation to design radial flow machine rotors by considering laminar flow. Based on the concept of traditional topology optimization approaches, in the adopted topological derivative formulation, solid or fluid material is distributed at each point of the domain. This is achieved by combining Navier-Stokes equations on a rotary referential with Darcy's law equations. This strategy allows for working in a fixed computational domain, which leads to a topology design algorithm of remarkably simple computational implementation. In the optimization problem formulation, a multi-objective function is defined, aiming to minimize the energy dissipation, vorticity and power considering a volume constraint. The constrained optimization problem is rewritten in the form of an unconstrained optimization problem by using the Augmented Lagrangian formalism. The resulting multi-objective shape functional is then minimized with help of the topological derivative concept. In the context of this article, the topological derivative represents the exact sensitivity with respect to the nucleation of an inclusion within the design domain and the obtained analytical (closed) formula can be evaluated through a simple post processing of the solutions to the direct and adjoints problems. Both mentioned features allow for obtaining the optimized designs in few iterations by using a minimal number of user defined algorithm parameters. All equations and the derived continuous adjoint equations are solved through finite element method. As a result, two-dimensional designs of flow machine rotors are obtained by using this methodology. Their performance is analyzed by evaluating velocity and pressure distributions inside rotor. (AU)

Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
Beneficiário:Julio Romano Meneghini
Linha de fomento: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
Processo FAPESP: 15/15189-7 - Método de otimização topológica aplicado ao projeto de rotores de máquinas de fluxo radiais operando em escoamento laminar
Beneficiário:Luís Fernando Nogueira de Sá
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 16/19261-7 - Método de otimização topológica aplicado ao projeto de rotores e voluta de dispositivos de auxílio ventricular
Beneficiário:Luís Fernando Nogueira de Sá
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 13/24434-0 - Sistemas propulsores eletromagnéticos para coração artificial implantável e dispositivos de suporte circulatório mecânico
Beneficiário:José Roberto Cardoso
Linha de fomento: Auxílio à Pesquisa - Temático