Simulation and analysis of the aerodynamic forces and moments acting on the tumble flap inside an intake manifold of IC Engine
Résumé
Computational Fluid dynamics is a tool widely used in automobile organization during development and optimization phase of the air intake manifold for internal combustion engines. Throttle valve, a flow control device, is extensively used in air intake lines of internal combustion engines because of their low cost, and fast operation. Nowadays, similar mechanical component close to Throttle valves are also mounted at the exits of intake manifold runners. These components referred as tumble flaps are used to guide the in-cylinder flow and hence to improve air-fuel mixing inside the combustion chamber. The movements of these flaps are controlled by the engine management system by the aid of electrical or pneumatic mechanisms. So, it becomes important to identify the torque required to move the flaps at different operating angles of the flaps. The main objective of the work is to perform CFD simulations in order to identify the forces and aerodynamic moments acting on the flaps while operating in the steady state condition. For the analysis, rhoSimpleFoam, a steady state compressible flow solver is used to simulate the 3D, steady, compressible air flow inside the intake manifold geometry. A detailed analysis of the forces and moments acting the flap has been carried out in this paper using the results of the numerical simulation. Later on, the prototype has been tested on the experimental flow bench to validate the results of the numerical simulation in terms of pressure drop across the component.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)