SI ENGINE MODELLING FOR MAX POWER AND TORQUE: SELECTED ENGINE MODEL AND SPECIFICATIONS: * 4CYL SI GDI ENGINE MODEL  SPECIFICATIONS: 1. 4CYL 16VALVE SOHC ,73X89.4 mm 2. NATURALLY ASPIRATED,WATER COOLED 3. 87.7KW - 6600RPM 4. 145 N-m - 4600RPM ENGINE MODEL: BEFORE MODIFICAIONS:   BRAKE POWER : 103.0KW at 6600 RPM…

RANKINE CYCLE SIMULATOR : clear all close all clc disp(\'Rankine Cycle Simulator\') disp(\'process 1-2: Isentropic expansion in turbine \') disp(\'process 2-3: constant pressure heat rejection in condenser\') disp(\'process 3-4: Isentropic Compression in pump\') disp(\'process 4-1: constant pressure heat addition in boiler\')…

TURBOCHARGER  MODELLING IN GT-SUITE: INTRODUCTION : *Turbocharger is the additional device used in the natural breathing engines to add up the extra power and also to improve the efficiency of the engine. TYPES OF TURBO CHARGER USED: * Fixed Turbo charger * Waste gate turbo charger * Variable geometry Turbine(VGT)…

OPTIMIZATION : Considering a predictive diesel engine model from the GT-SUITE examples : * DIESEL_4CYL_DIPulse_injRateMap : Model : DESCRIPTION : * Predictive model predicts the burnrate with the own calibrated Injectionmaps : DI-pulse Model : INJECTION AND SOI MAPS: INJ RATE MAP : SOI MAP : OPTIMIZATION OF bsfc and Nox…

2.DISCRETIZATION : BUILDING INTAKE MANIFOLD FROM STL MODEL (TUTORIAL NO-2) : DESCRIPTION : * Discretization technique is used when we are having the 3D model with us , and this technique is done by splitting the 3D model into various 1D model . * eg : Here we are considering the intake manifold of the engine which…

CONSIDERED SPECIFICATIONS : MODEL : MAHINDRA NOVO 755di  Engine Capacity : 3500cc Bore Diameter(B)   : 106mm Stroke(S) : 127 mm (calculated from the formula) Displaced volume = (pi/4)*(B)^2*S*No.of.cylinders ; Connectingrod length = almost twice of stroke (around 254mm) As per specification 4cyl diesel engine…

FILE PARSING: MATLAB PROGRAM: clear all close all clc %getting the data file f1=fopen(\'THERMO.dat\',\'r\') fgetl(f1) %reading the header information A=fgetl(f1) A=strsplit(A,\' \') global_low_temp=str2num(A{2}) global_mid_temp=str2num(A{3}) global_high_temp=str2num(A{4}) %skipping next three lines for i=1:3 fgetl(f1)…

1CYL-CI ENGINE ANALYSIS: 1.COMPARISON OF SI AND CI ENGINE: * SI Engine is a spark ignition engine which uses spark plug for the ignition to attain the self ignition temperature whereas CI is a self ignition engine which attains the self ignition temperature during the compression. *As gasoline consists of high octane number…

FRM ( FAST RUNNING MODEL ) :[Tutorial : 9] Introduction: FRMs execute much more rapidly than the typical detailed GT-POWER engine model, and are ideal for integrating with other vehicle systems where an accurate and predictive engine plant model is desired and where computational speed is critical.  FRMs adapt to…

GASOLINE VS DIESEL EMISSIONS: 1.POLLUTANTS: * DESCRIPTION:                 The Emissions from the engines is purely based upon the "AFR(Air fuel Ratio)", in which the Air-fuel mixture determines the combustion efficiency and also the emissions . In which the AFR doesnt…

GUI OF GT-POWER: The characterisation of GT-power is basically consists of ; *TEMPLATES *OBJECTS *PARTS The parameters  available in GT-suite are: *FLOW  *MECHANICAL example: The basic subdivisions of parameters are; *COMPONENTS under components; the templates available are  1.Endenvironments objects under…

1.RUNNING THE ENGINE AT 1800 RPM AND THE CORRESPONDING OUTPUTS: MODEL: 1.AIR FLOW RATE (Kg/h) : 24.6Kg/h 2.BRAKE MEAN EFFECTIVE PRESSURE(BMEP): 9.5 bar 3.BRAKE SPECIFIC FUEL CONSUMPTION(BSFC) : 239.2 g/Kw-h 4.IN-CYLINDER PRESSURE(bar) : 48.89 bar   2.RUNNING THE ENGINE AT 3600 RPM: POWER OUTPUT (BRAKE POWER) : 16.7…

DETAILED MODELLING OF AFTERTREATMENT DEVICES IN GT-POWER : EXAMPLES > Engine+Aftertreatment : 1. Detailed CI engine aftertreatment 2. Detailed SI engine aftertreatment 3. Engine state vehicle aftertreatment NEDC model : ENGINE + AFTERTREATMENT : * The integration of the aftertreatment model with the engine model is…

OBJECTIVE: Deriving the fourth order schemes for the second order derivative using the "central differencing","skewed right","skewed left" schemes,with the taylor table method. To simplify the algebraic calculations and to find the co-efficients easily the taylor series expansion is used with the table format.…

AIM: To solve the 2D heat conduction equation using MATLAB for both steady and transient states. Heat Equation: Where T is the function of x,y,z,t and t is "time" And considering only 'x' and 'y' gives the 2D heat equation. alpha = thermal diffusivity (assumed as 1.4 )   Assumptions made: 1. The material…

:   To simulate an incompressible-laminar-viscous flow through the backward-facing step geometry and perform a transient simulation.   GIVEN SPECIFICATIONS: Case 1 - Simulate the flow without using any grading factor (i.e., GF = 1) Case 2 - Simulate the flow with a grading factor of 0.2. The cells…

Objective : To do the simulation of flow through a pipe where using the wedge boundary conditions and to make a study over the 'Hagen poiseuille's equation'.   Hydrodynamic entrance length: The hydrodynamic entrance region refers to the area of a pipe where fluid entering a pipe develops a velocity profile due to…

AIM : To simulate the laminar flow of water through a circular pipe with the icoFoam solver and compare the results of simulation with the analytical solutions given by Hagen Poiseuille equations and to write a Matlab program that can generate the computational mesh automatically for different given wedge angle and grading…

AIM: To perform the flow simulation through a flow bench by modeling the geometry and obtaining a lift vs mass flow rate plot.  Grid dependence test For three grids run the simulation at a particular valve lift and explain the result. Effect of valve lift on mass flow rate After deciding the best grid, run a parametric…

AIM :   To design a 3D model of centrifugal pump ,run a baseline flow simulation where inlet flow takes place and then perform a parametric study for different velocities and then to obtain the relationship between Pressure ratio and mass flow rate.   Parameters: Internal flow simulationSteady-state studyTemperature:…

AIM: To study the flow over NACA0017 airfoil and compare the lift and drag force for the various angle of attack. THEORY: Airfoil is defined as the cross-section of a body(shape of wing, blade of propeller rotor or turbine or sail) that is placed in an airstream in order to generate useful aerodynamic force. There…

AIM: To simulate flow over a cylinder at different Reynold's number conditions. Increase Reynold's number by a factor of 20%, 40%, and 100% then run the transient simulation. Create animations for pressure-velocity for all the three Reynolds number. THEORY: The Reynolds number (Re) is an important dimensionless…