Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Experimental and Numerical Analysis of Underexpanded Jet
Submission Author:
Derek Jorge , SC
Co-Authors:
Derek Jorge, Marcelo Mendes Vieira, Thais Moraes, Daniela Maionchi, Evandro Silva, Robson Leal da Silva
Presenter: Derek Jorge
doi://10.26678/ABCM.COBEM2017.COB17-1752
Abstract
Compressed air equipments are widely used in research and industry. The present contribution deals with numerical and experimental studies of the compressibility phenomena that occurs in fluid jets with the formation of shock waves. Numerical simulations based on finite volume integration were performed for a compressible gas flow over a nozzle using the CFD software OpenFOAM. The effect of working parameters, such as nozzle diameter and flow rate for an air jet was analysed. The smaller the nozzle diameter the greater the occurrence of shock waves. Higher flow rates also favor the appearance of shock waves. The Schlieren method of visualization was adopted to obtain the images of the shock waves with a CDD camera. The experimental results presented a high accuracy to the numerical ones, what validates the model proposed to describe the jets.
Keywords
Compressible flow, CFD, underexpanded jets, Schlieren visualization method
