Open AccessAssessment of different turbulence models in simulating axisymmetric flow in suddenly expanded nozzles
Author(s) -
Sher Afghan Khan,
Mir Owais Ali,
Miah Mohammed Riyadh,
Zahid Hossen,
Nafis Mahdi Arefin
Publication year - 2018
Publication title -
international journal of engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2227-524X
DOI - 10.14419/ijet.v7i3.29.18804
Subject(s) - turbulence , mach number , nozzle , rotational symmetry , mechanics , computer simulation , flow (mathematics) , physics , range (aeronautics) , turbulence modeling , aerospace engineering , engineering , thermodynamics
A numerical simulation was carried out to compare various turbulence models simulating axisymmetric nozzle flow past suddenly expanded ducts. The simulations were done for L/D = 10. The convergent-divergent nozzle has been modeled and simulated using the turbulence models: The Standard k-ε model, The Standard k-ω model and The SST k-ω model. Numerical simulations were done for Mach numbers 1.87, 2.2, and 2.58 and the nozzles were operated for NPRs in the range from 3 to 11. From the numerical analysis it is apparent that for a given Mach number and effect of NPR will result in maximum gain or loss of pressure. Numerical results are in good agreement with the experimental results.