Development of a numerical model for prediction of a flow in a H.O.M.E.R nozzle
DOI:
https://doi.org/10.26512/ripe.v5i1.19213Keywords:
Numerical Study. Turbulent Flow. Coanda Effect. Nozzle H.O.M.E.R.Abstract
In the present study a numerical model is developed for the approach of turbulent flows in the permanent regime in HOMER (High-speed Orienting Momentum with Enhanced Reversibility) nozzles consisting of the mixing of two jets and incidence on a surface of Coanda. This surface causes a deflection in the flow allowing the nozzle to act as a maneuvering device in aeronautical applications. The main objective is to evaluate the numerical model developed comparing with numerical results of the literature. The time-averaged mass and momentum conservation equations are solved numerically by the finite-volume method. To solve the problem of turbulence closure, classical model (RANS) was used with model k - ε. Firstly, a mesh independence test will be performed with the aim of expending less computational resources, while achieving accurate results. Then, the simulations will be done in a steady state, with the objective of obtaining the deflection angles (α) generated with the difference of the injected mass flow in each of the channels of the H.O.M.E.R (m *) nozzle. Subsequently, these results are compared with those obtained numerically in the literature. The results obtained had the same behavior as those obtained in the literature, in which the increase in the difference between the incoming jets led to an increase in the angle of jet deflection in the nozzle. With the exception of a specific value (m * = 0.2) the results obtained in the present work presented a good agreement with those predicted numerically in the literature.
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