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INTRODUCTION :- Recuperator is a type of heat exchanger that are often used in power engineering, to increase the overall efficiency of thermodynamic cycles that has separate flow paths for each fluid along their own passages and heat is transferred through the separating walls. The recuperator transfers…

INTRODUCTION When the chemical reaction is combustion reaction, heat is evolved from the reaction. This heat might be used to raise the temperature of the system including reaction products and the remained reactants. When the combustion reaction is conducted under adiabatic conditions, the highest temperature can be achieved…

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INTRODUCTION :- Sensitivity analysis is one of the most widely used tools in kinetic modeling and is performed using perturbation-factors of the individual reaction rate coefficients and monitoring the effect of these perturbations on the observables of interest. Basically, Sensitivity Analysis is used to understand the…

INTRODUCTION :- Stability means that errors at any stage of the computation are not amplified but are attenuated as the computation progresses. The condition of a mathematical problem relates to its sensitivity to changes in its input values. We say that a computation is numerically unstable if the uncertainty of the input…

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INTRODUCTION A multi-step reaction is a combination of two or more elementary steps. If we can predict how fast these reactions takes place then their reaction pathway could be predicted. In order to obtain so we need to have values of operating conditions and rate of reaction. In this challenge we derive reaction rates…

1. Use the \"moles\" method/function of the A object and explain how it was calculated.  A. The object A is air. Consider any fuel(hydro-carbon) reaction with air. The equation is written in the following way :- CxHy +b(O2+3.76N2) -> xCO2 +y/2H2O + 3.76bN2 So the mole-fraction for air is = b/(b+3.76b) = 0.21. One…

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INTRODUCTION :- In order to estimate the combustion process inside a combustion chamber it is fundamental to evaluate the molar fractions of the gases which constitute the burned mixture. A non linear set of equations must be solved to evaluate the mixture composition.                …

INTRODUCTION :- Combustion in IC engines is considered to be occurring in four stages. The very first stage is the ignition delay period. It is also known as preparatory phase during which some fuel has already been admitted but hasn’t yet been ignited. It is of extreme importance due to it’s effect on combustion…

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INTRODUCTION GT-suite offers engineering operation ranging from fast concept design to detailed system or sub-system/component analyses, design optimization, and root cause investigation. It is a multi-purpose platform with many physical libraries, containing both fundamental and higher-level components.  Using…

INTRODUCTION :- Detailed chemical kinetic mechanisms contain up to several thousand species and several ten thousand reaction steps.  Within such large mechanisms, the key processes can be pointed out by the presence of many reaction steps of only marginal importance. A first step to reducing the size of a kinetic…

1.Running the case at 1800 rpm and following parameters are noted down : A. First running the tutorial SI engine calibration at given 1800 rpm and following parameters are noted down :     Air flow rate : The amount of air (in kg) flow flowing in the cylinder per hour is 24.6(kg/h) BMEP : The brake…

AIM : Compare SI vs CI and list down differences, comment on parameters like BSFC, Exhaust Temperature, A/F ratios and change MFB 50 values and observe changes.   APPROACH : Open the tutorial files in GT-ISE and in engine performance choose for respective SI-final and CI-final engines from the file 01-1cylDIorSI…

A turbocharger uses engine exhaust energy to breathe more air into the combustion chamber for a more efficient engine operation.Turbochargers are basically intended to increase the power of IC engines.   List of different Turbo-chargers : Single-Turbo Twin-Turbo Twin-Scroll Turbo Variable Geometry Turbo Variable…

FAST RUNNING MODEL IN GT-POWER 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 changing conditions (e.g.…

Discretization : The numerical solution of differential equations cannot produce a continuous distribution of the variables over the solution domain, thus the aim instead becomes to produce a set of discrete values at a number of nodes that cover the solution domain. There are three popular methods to discretize …