The present computation study investigates multi-orifice injection with centre air core. To enhance the mixing process, high pressurized air has been injected at the centre portion of the orifice plate. Numerical simulation has been carried out to study the gaseous jet interaction and liquid jet interaction with air with toluene-air, kerosene-air and water-air as working fluids. Species transport model and Volume of Fluid (VOF) method in Multiphase model are used in the present analysis, which is capable of predicting the interface between these two different fluids each of which is having different mass densities. Initially, dimension of computational domain has been optimized by simulating jet through multi-orifice injector into mixing chamber of different dimensions. Later, grid independent study has been carried out with an optimum computational domain for five different grid sizes. Performance parameters like maximum penetration and volume fraction of liquid profile at different downstream locations has been compared in these five different cases. And one particular grid size is chosen with reasonable computational cost for the rest of analysis. Steady and transient simulations were performed to study the interaction between jet and air. Effect of centre air core on penetration length has been studied and compared. Deformation of cylindrical jet has been captured at different downstream locations and compared in steady analysis. Temporal evolution of the liquid jet forming the spray has been captured at different time-steps and compared in transient analysis.
Computational Analysis of a Multi-orifice Rotary Injector with Air Core
Lect.Notes Mechanical Engineering
Proceedings of International Conference of Aerospace and Mechanical Engineering 2019 ; Chapter : 30 ; 361-371
2020-06-13
11 pages
Article/Chapter (Book)
Electronic Resource
English
Multi-orifice injector , Species transport model , Volume of Fluid (VOF) model , Steady analysis , Transient analysis Engineering , Aerospace Technology and Astronautics , Vibration, Dynamical Systems, Control , Fluid- and Aerodynamics , Quality Control, Reliability, Safety and Risk , Engine Technology , Engineering Thermodynamics, Heat and Mass Transfer
Variable Area Orifice Injector
NTIS | 1965
|Development of the platelet micro-orifice injector
NTRS | 1984
|