Solving a Combustion Simulation for a Sector

In this tutorial a complete Direct injection (DI) compression ignition (CI) engine geometry is transformed into 60° sector in-order to reduce mesh size and solution time. Detailed boundary conditions are as shown in the  Figure 3.1: Problem Schematic (p. 107). Sector simulation is started at intake valve Closing (IVC) with initial conditions as 3.45 bar and 404 K, species mass fraction of O2=0.1369, N2=0.7473, CO2=0.0789,H2O=0.0369. n-heptane (nc7h16) is used as surrogate for diesel fuel and is injected 8 degrees before compression ( T op Dead Center). Engine rpm is increased from 1500 rpm to 2000 rpm and its effect...

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Solving a Port Flow Simulation in IC Engine

In this tutorial of port flow analysis, you will measure mass and angular momentum flux (swirl and tumble) for given cylinder head and intake port design over varying valve lifts of 2mm, 6mm and 10mm. You will create swirl monitor planes at 30 mm, 45 mm, and 60 mm below the cylinder head. The inlet, outlet and wall boundary conditions are as shown in the  Figure Problem Schematic. Initial conditions are pressure 101325 Pa and temperature 300 K. The tutorial illustrates the following steps in setting up and solving a port flow simulation of an IC engine. • Launch...

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Solving a Cold Flow Simulation in IC Engine

A three dimensional single cylinder CFD simulation of a 4-stroke engine is performed under motored conditions (cold flow) in this tutorial. Detailed boundary conditions are shown in  Figure 1.1: Problem Schematic(p. 1). Engine simulation is started from Intake valve opening (IVO) followed by air flow during intake stroke. Air is compressed as piston moves towards top dead center ( TDC). This is followed by expansion of air as piston moves towards bottom Dead center (BDC). This tutorial ser ves as an intro-duction in releasing the streamlined workflow between pre-processing, solver and post processing while carrying out simulations with Fluent....

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IC Simulation for Canted Valve Engine Using Hybrid Approach

Introduction Two approaches are employed in ANSYS FLUENT to solve in-cylinder (IC) problems, namely, hybrid approach and layering approach. The layering approach is used for engines with vertical valves like most diesel engines, while the hybrid approach is typically used for engines with canted valves like most spark ignited (SI) engines. For either approach mentioned above, IC problems solved in ANSYS FLUENT consist of three stages. Decompose the geometry into different zones and mesh them properly. By breaking up the model into different zones, it is possible to apply different mesh motion strategies to different regions in a single...

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Solving a Gasoline Direct Injection Engine Simulation

A three dimensional single cylinder CFD simulation, of a 4-stroke spray guided Gasoline Direct Injection(GDI) Spark Ignition (SI) engine, is performed in this tutorial. Detailed boundary conditions are shown in Figure 4.1: Problem Schematic (p. 173). Engine simulation is started from Intake valve opening (IVO) and fuel is injected during the intake stroke. Homogeneous fuel air mixture is compressed and spark ignited 15° before compression Top Dead Center (TDC).[1] [1] Download Tutorial Coming Soon …. —————————————————— [1]...

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