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A phenomenological model of two circular turbulent jets

A semi-analytical model for the interaction of twin circular jets is developed, requiring the solution of a second-order differential equation for the momentum balance. This model (‘Bending Model’) can predict the trajectory and the attachment of two jets. Using Reichardt’s hypothesis, the three-dimensional velocity field of dual-hole circular jets can be predicted. The model is used to predict the interaction of converging, diverging, parallel and non-equal jets. The results show encouraging agreement with k–ε numerical simulations and experimental results from the literature. The position of the maximum velocity is predicted to within 5%, and the model can predict the velocity field as well as the k–ε model. The current model can be useful in phenomenological engine simulation of multi-hole injectors.