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RANS Simulation of Over- and Under-expanded Beveled Nozzle Jets Using OpenFOAM

  • B. Zang
  • Vevek U S 
  • T. H. NewEmail author
Conference paper

Abstract

The present study numerically investigates supersonic jet flows issued at M = 1.45 from a beveled nozzle with 60° inclination. Utilizing rhoCentralFoam solver in OpenFOAM, unsteady Reynolds-averaged Navier-Stokes (RANS) simulations were performed with two nozzle pressure ratios (NPRs) of 2.8 and 4, corresponding to over- and under-expanded exit conditions, respectively. The Mach distributions reveal a more organized near-field shock formation for the over-expanded jet with smaller and periodic shock cells, as compared to those of the under-expanded one. Moreover, the jet flows are deflected in opposite directions for the two different NPRs, indicating a strong dependence of jet vectoring on NPR in addition to the bevel angle. Last but not least, reasonably good agreements can be observed for both qualitative and quantitative comparisons between simulation and experimental results, supporting the notion that the compressible rhoCentralFoam solver in OpenFOAM is suitable to model such supersonic jet flows.

Notes

Acknowledgment

The authors would like to acknowledge Lim H.D. and Wei X. for the schlieren flow images, as well as the support for this study by a Singapore Ministry of Education AcRF Tier-2 grant (grant number: MOE2014-T2-1-002) and Singapore National Supercomputing Center (NSCC).

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Mechanical and Aerospace EngineeringNanyang Technological UniversitySingaporeSingapore

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