Study of the compressible aerodynamic flow over a moving cylinder

• Grant number: 13/26558-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2014
• End date: March 31, 2015
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: William Roberto Wolf
• Grantee: Alexandre Berto Calvinho
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 13/03413-4 - Investigation of noise generation and propagation by aerodynamic configurations using computational aeroacoustics, AP.JP

Abstract

The study of the flow around cylindrical bodies has several direct applications in practical problems of civil, aeronautical, mechanical and petroleum engineering. At specific Reynolds numbers, vortex wakes are produced by the flow around cylindrical objects. Furthermore, due to the flow unsteadiness, acoustic waves are generated and propagated to the far field. The specific vortex formations depend on the flow velocity as well as the possible movement of the cylinder. One could investigate either a flow configuration where the cylinder is stationary or, for instance, one for which the cylinder is translating with accelerating conditions. In the present work, numerical simulations will be conducted for a cylinder at a specified movement of translation. The Navier Stokes equations will be solved in their compressible form and an investigation of the patterns of vortex wake formation will be presented. Furthermore, as investigation of noise generation and propagation will be conducted for the flow configurations of interest. Aerodynamic flows at low Reynolds numbers and low to moderate Mach numbers will be studied. Therefore, an analysis of the compressibility effects on vortex wake formations and their subsequent noise propagation will be presented.