Week 10 - Simulating Combustion of Natural Gas.

Aim:           To understand the concept of converting high-fidelity model to fast running model (FRM) and also building FRM model using builder approach. Objective: To understand the concept of converting Engine Model to Fast Running Model (FRM) from Tutorial-9. Building…

Week 6 Challenge: Turbocharger Modelling Aim and Objectives: List down different TC and locate examples from GT Power Explore tutorial number 6 and 7 Plot operating points on compressor and turbine maps In which application Variable Geometry Turbine is beneficial? Explore example- Diesel VGT EGR and understand the modeling…

Aim: Basic calibration of single cylinder CI engine.   Objectives: 1.Compare SI vs CI and list down differences (assignment no 2-SI) 2.Comments on following parameters BSFC Exhaust Temperature A/F ratios 3.Change MFB 50 and observe impact on performance   SI and CI engine differences: S.no Spark Ignition Engine…

AIM : To run the single cylinder SI engine setup at 1800 rpm and list down parameters such as air flow rate, BSFC, BMEP, In cylinder pressure. To run the same setup at 3600 rpm and to increase the output by 10%. Introduction A spark-ignition engine (SI engine) is an internal combustion engine generally a petrol…

Introduction: GT Suite is the CAE simulation tool with capabilities and libraries aimed at  a vide range of application and industries. It offer engineering functionalities ranging from fast concept design to detailed system or sub system/component analysis,design optimization and root couse investigation. Applications…

OBJECTIVE- For the given Tesla Cybertruck model , check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria. Steps involved:- TOPOCLEANUP PID's Assign 2D meshing with different mesh length for different PIDs Wind Tunnel creation Volumetric…

Aim/Objective : To do surface wrap over assembled parts (engine,transmission and gear box) Target length for Wrap = 3mm Procedure : First the model is loaded on to ANSA Unwanted surface are deleted without damaging the outer shape of the geometries. Single cons are resolved mainly here as it would affect negetively on…

Aim: To perform CFD Meshing for BMW car Objectives: For the given model, check and solve all geometrical errors on half portion and Assign appropriate PIDs. Perform meshing with the given Target length and element Quality criteria. After meshing the half model, Do symmetry to the other side. Target lengths for the different…

Aim: For the given model, check for the geometrical errors to make appropriate volumes. Create and assign PIDs. Perform surface mesh with the given target lengths as per PIDs Blade stage-1 = 1 mm Blade stage-2 = 1 mm Impeller = 2 mm Shaft rotor = 1 mm Turbo casing = 5 mm Compressor casing = 5 mm Inlet casing cover = 5…

Aim: For the given model, check for the geometrical errors and perform Topology cleanup accordingly. Set three different target lengths as three different cases and mesh the model.  Target length = 1mm, 3 mm and 5 mm (i.e. 3 cases) Element type = Tria Solution procedure: 1.Importing the CAD model: Open ANSA import…

Aim: Part I: Perform a combustion simulation on the combustor model and plot the variation of the mass fraction of the different species’ in the simulation using line probes at different locations of the combustor as shown in Fig. You need to plot for CO2, H2O, CH4, N2, O2, NOx emissions & Soot formation. Part…

Aim: To perform a parametric study on the gate valve simulation by setting the opening from 10 % to 80%.  Objectives: Obtain the mass flow rates at the outlet for each design point. Calculate the flow coefficient and flow factor for each opening and plot the graph. Discuss the results of the mass flow rate and flow…

Aim:  To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop.  Objective: To write a few words about any four empirical models used to calculate the cyclone separator efficiency.  To perform an analysis on a given cyclone separator model by varying the particle…

Aim: Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. Objectives: Run the simulation by varying the velocity from 1m/sec to 5m/sec for at least 3 velocities and discuss the results. Find out the maximum temperature and heat transfer coefficient attained by the processor. Prove that…

Aim: To perform Rayleigh Taylor instability CFD simulation. Objectives: What are some practical CFD models that have been based on the mathematical analysis of Rayleigh Taylor waves? In your own words, explain how these mathematical models have been adapted for CFD calculations. Perform the Rayleigh Taylor instability…

Aim : To perform CHT analysis on exhaust port for a velocity of 5m/s. Objectives: Give a brief description of why and where a CHT analysis is used. Maintain the y+ value according to the turbulence model and justify the results.  Calculate the wall/surface heat transfer coefficient on the internal solid surface &…

Aim: To run the simulation on Ahmed body for the velocity of 25 m/sec with the default air properties in fluent. Objectives: 1.Describe Ahmed's body and its importance. 2.Explain the reason for the negative pressure in the wake region.  3. Explain the significance of the point of separation.  Introduction : Ahmed…

Aim: Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street.   Objectives: Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100.  Calculate the coefficient of drag and lift over a cylinder by setting the Reynolds number to 10,100,1000,10000…

Aim: To set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 360C & the Cold inlet is at 190C. Use the k-epsilon and k-omega SST model for the first case and based on your judgment use the more suitable model for further cases. Case 1  Short mixing tee with a hot inlet…

Aim: Sensitivity analysis of GRI 3.0 mechanism. Objective: To write a code that takes all the reaction from GRI mechanism and calculate the 10 most sensitive reactions and the program should show the reaction strings in the order of greatest sensitivity to the least sensitivity. Plot the graph for sensitivity vs reactions.…

Aim:  To simulate the Auto Ignition Time for Methane under the following conditions, (simulation time = 10 secs) Plot the variation of Auto Ignition time of Methane with a constant temperature of 1250K and pressure varying from 1 to 5 atm. Plot the variation…

Aim : To solve the given set of coupled non linear equations using multivariate newton raphson method. Given data: Initial guess values: y1=1 y2=0 y3=0 Methods incorporating newton raphson solver: 1. Implicit scheme 2.Jacobian method.   Newton Raphson method: The Newton-Raphson method (also known as Newton's…

Introduction: In a system when a disturbance occurs, and if the system tends to minimize the error or disturbance then it is a stable system. But whereas, when the error or disturbance arises to continue and not decrease the system is said to be unstable. In Numerical discretization, a small error appears during mathematical…

Aim: To derive the reaction rate ODEs & production of each species for the simple reaction mechanism and represent it in compact notation form. The compact notation form for the reactions given. Before arriving to the compact notation, we have to define the species and reactions.Here j is the number of species and…

Aim: 1.To find the effect of preheating on AFT from changing temperature from 298K to 600K. 2. To find whether pre heating helps in saving the fuel and increases the combustion efficiency. Recuperator and Regenerator: A recuperator is a heat exchanger in which energy from a steady flow of hot combustion products,i.e flow…

Aim :  In this assignment we are going to work on the recuperator mechanism ,to find the mixture calculation of the air and fuel and the chemical reaction and to print the adiabatic flame temperature. Case 1:  We have to find the mole fraction analytically of the air mixture. Since we are dealing with stoichiometric…

Aim :  To find the Adiabatic flame temperature on equivalence ratio with different Hydrocarbons and for different alkanes with heat loss (In constant pressure chamber)and without heat loss. Adiabatic flame temperature variation with respect to Alkane,Alkene,Alkyne. Adiabatic flame temperature variation with respect…

Objective: To simulate an axi-symmetric flow by applying the wedge boundary condition. The flow is laminar and flows through a constant cross-section pipe at an inlet Reynold's number of 2100. To write code in Matlab to automate the generation of blockMeshDict file. The code should take inputs like pipe length, diameter,…

Objective: To simulate an axi-symmetric flow by applying the wedge boundary condition. The flow is laminar and flows through a constant cross-section pipe at an inlet Reynold's number of 2100. To write code in Matlab to automate the generation of blockMeshDict file. The code should take inputs like pipe length, diameter,…

Aim: Simulate an incompressible-laminar-viscous flow through the backward facing step geometry. Perform transient simulation based on the described physics of flow in the problem statement. Explain the simulation process and way of setting the problem satement in OpenFoam and explain the changes to get the desired results.…

Finite Volume method: FVM is  amethod for representing and evaluvating the partial differential equations in the form of algebraic equation , similar to FDM and FEM the values are calculated at discrete places. In the finite volume method, volume integrals in a partial differential equation that contain a divergence term…

Objective:  To simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle by deriving both the conservation and non-conservation forms of the governing equations and sovle them using the MacCormack's technique. Problem statement: 1. Steady-state distribution of primitive variables inside the nozzle.2.…

Objective: To solve the 2D heat conduction equation by using the point iterative techniques such ad Jacobi,Gauss seidel and successive over relaxation method for implicit and explicit svhemes in MATLAB. Theory: The heat conduction equation is a partial differential equation that describes the distribution…

Objective To find the 4th order approximations of the second-order derivative. Central difference Skewed right-sided difference Skewed left-sided difference and compare their truncation error. Taylor table for central difference scheme: The 4th order central difference of the second order derivative  ,by…