Author : S. J. Suryawanshi and R. B. Yarasu

Producer Gas Engines are gaining more and more demand in present day to day life. Proper mixing of Producer Gas and Air is very important for obtaining the combustible air-fuel mixture in an engine. Design of Intake manifold of an engine plays an important role in obtaining proper air-fuel mixture. Different geometrical parameters can be altered or modified for achieving the proper mixing of fuel and air. Computational Fluid Dynamics (CFD) simulation technique is one of the most widely used software simulation technique for such an analysis. CFD Simulation provides the feasibility of using combinations of different geometrical parameters with time saving also. In this paper, a computational study for good mixing of air and producer gas for T shape of Intake manifold for air inlet pipe length of 75mm, 100mm and 150mm is carried out at mixing lengths of 50mm, 100mm, and 150mm. The simulation is done for same input data for all types of Intake manifolds. The analysis showed that for different geometries different mixing lengths are obtained for good mixing. The results showed that the optimum mixing length of 100mm for an air inlet pipe length of 75mm gives proper and uniform mixing of air and producer gas than other combinations. This shows that mixing is strongly dependent on the geometry of the Intake manifold of the engine.

Keywords: Producer gas, Producer Gas Engine, Computational Fluid Dynamics, Mixing length, Intake manifold.