Modification of Standard K-ε Turbulence Model for Analysis and Design Refinement of Fuel Ejector Pump

*† , In this paper flow analysis and design refinement of a fuel ejector pump is done by using Computational Fluid Dynamics technique. The flow inside the ejector pump is modeled as incompressible, steady and turbulent that is governed by the RANS system of equations along with two-equation standard K-e turbulence model for closure. The comparison of computed results with test data indicates that the default values of constants of the K-e turbulence model need adjustment due to complex nature of turbulent flow inside the pump. The values of these constants are then optimized for the unique flow field inside the fuel ejector pump in order to computationally reproduce the test data. Based on these optimized constants, detailed flow field analysis is done that highlight a possible improvement area in pump design. This design refinement is also computationally evaluated and an improvement in pump performance is predicted.