scholarly journals Experiment and Investigation in Reducing Emission from an IC Engine by using Inlet Helical Roller

2021 ◽  
Vol 23 (10) ◽  
pp. 318-326
Author(s):  
S. Rajendran ◽  
◽  
K. Ganesan ◽  
K. Sakthivel ◽  
SM. Murugesan ◽  
...  
Keyword(s):  
Combustion Engine ◽  
Intake Manifold ◽  
Major Influence ◽  
Ic Engine ◽  
Inlet Stream ◽  
Flow Formation ◽  
Small Change ◽  
And Performance ◽  
Cylinder Flow ◽  
Combustion Processes

This research paper reports that in-cylinder flow formation in a combustion engine has a major influence on the combustion, emission and performance characteristics. Air and fuel enters the combustion chamber of an engine throughout the intake manifold with high velocity. So, it introduces a helical roller in the path of inlet stream of mixture. It achieved the swirl by using a component that could be easily integrated into any existing engines at low engine speed. The performance of the engine increases and completes the combustion, leads to reduced emissions and small change in volumetric efficiency. It is also proved that increased swirl movement introduces helical roller that helps the flame spread which used into constant heat transfer rate. This suggests to a new combustion technique that should be developed to yield improved primary combustion processes in-side the engine with significantly reduced exhaust gas emissions.

scholarly journals Numerical Investigation of Fluid Flow and In-Cylinder Air Flow Characteristics for Higher Viscosity Fuel Applications

Processes ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 439 ◽  
Author(s):  
Mohd Fadzli Hamid ◽  
Mohamad Yusof Idroas ◽  
Shukriwani Sa’ad ◽  
Teoh Yew Heng ◽  
Sharzali Che Mat ◽  
...  
Keyword(s):  
Guide Vane ◽  
Flow Characteristics ◽  
Engine Performance ◽  
Intake Manifold ◽  
3D Analysis ◽  
Ansys Fluent ◽  
Ic Engine ◽  
Cold Flow ◽  
Ci Engine ◽  
Combustion Processes

Generally, the compression ignition (CI) engine that runs with emulsified biofuel (EB) or higher viscosity fuel experiences inferior performance and a higher emission compared to petro diesel engines. The modification is necessary to standard engine level in order to realize its application. This paper proposes a guide vane design (GVD), which needs to be installed in the intake manifold, is incorporated with shallow depth re-entrance combustion chamber (SCC) pistons. This will organize and develop proper in-cylinder airflow to promote better diffusion, evaporation and combustion processes. The model of GVD and SCC piston was designed using SolidWorks 2017; while ANSYS Fluent version 15 was utilized to run a 3D analysis of the cold flow IC engine. In this research, seven designs of GVD with the number of vanes varied from two to eight vanes (V2–V8) are used. The four-vane model (V4) has shown an excellent turbulent flow as well as swirl, tumble and cross tumble ratios in the fuel-injected region compared to other designs. This is indispensable to break up heavier fuel molecules of EB to mix with the air that will eventually improve engine performance.

scholarly journals Predicting the Temperature and Composition – Dependent Density and Viscosity of Diesel Fuel – Ethanol Blends

2019 ◽  
Vol 64 (2) ◽  
pp. 213-220
Author(s):  
Adrian Todoruț ◽  
Andreia Molea ◽  
István Barabás
Keyword(s):  
Diesel Fuel ◽  
Combustion Engine ◽  
Fuel Ethanol ◽  
Major Influence ◽  
Fuel Production ◽  
Viscosity Models ◽  
Different Temperatures ◽  
Ethanol Blends ◽  
Combustion Processes ◽  
Dependent Density

Density and viscosity are very important fuel properties which have a major influence not only on the fuel production, transportation and distribution processes but also on the processes that take place in an internal combustion engine. Developing robust and high precision density and viscosity models for stabilized diesel fuel – ethanol blends helps the production of fuel to adhere to the quality requirements regarding density and viscosity and the modeling and simulation of injection and combustion processes. For modeling the density and the viscosity of diesel fuel – ethanol blends, five mixtures were prepared with ethanol content up to 15 % (v/v) and were stabilized by adding tetrahydrofuran as a surfactant at room temperature. The temperature-dependent density and viscosity of the blends were measured at four different temperatures (0, 15, 40 and 50 °C) using an SVM 3000 type apparatus. Based on experimental data, several mixing rules were fitted to them and three new models were developed, of which two need only one experimental value. These models yield very good accuracies, presenting average relative deviations of 0.0604 % in the case of density and 3.8931 % in the case of viscosity.

Design and Analysis of an Intake Manifold in an IC Engine

2015 ◽  
Vol 766-767 ◽  
pp. 1021-1027 ◽  
Author(s):  
R. Thamaraikanan ◽  
M. Anish ◽  
B. Kanimozhi ◽  
Thomaskutty George ◽  
Vivek George Koshy
Keyword(s):  
Computational Study ◽  
Geometric Model ◽  
Direct Injection ◽  
Flow Distribution ◽  
Project Work ◽  
Intake Manifold ◽  
Air Distribution ◽  
Ic Engine ◽  
And Performance ◽  
Inlet Manifold

The paper investigates the properly designed Intake or Inlet Manifold (IM) is vital for the optimal performance of an Internal Combustion (IC) engine. The primary function of the intake manifold is to evenly distribute the combustion mixture (or just air in a direct injection engine) to each intake performance of the engine. Even distribution is important to optimize the efficiency and performance of the engine. It is known that uneven air distribution leads to less volumetric efficiency, increased fuel consumption and also power loss. The main objective of the present work was to make a computational study of flow distribution in an intake manifold under steady state turbulence conditions in the current project work an intake manifold for 3-cylinder engine was modeled and analyzed numerically for evaluating the fluid flow. In this process, the geometric model was created with approximate dimensions (by using curves and points) in ANSA a pre-processing tool and the analysis was carried out using STAR CCM+ which is a solver and post-processing tool port in the cylinder head (s).

scholarly journals An approach to computational fluid dynamic air-flow simulation in the internal combustion engine intake manifold

2020 ◽  
Vol 24 (1 Part A) ◽  
pp. 127-136
Author(s):  
Stjepan Galambos ◽  
Nebojsa Nikolic ◽  
Dragan Ruzic ◽  
Jovan Doric
Keyword(s):  
Combustion Engine ◽  
Fluid Dynamic ◽  
Air Flow ◽  
Flow Simulation ◽  
Intake Manifold ◽  
Time Interval ◽  
Cad Model ◽  
Ic Engine ◽  
Engine Operation ◽  
Operating Points

The subject of this paper is modeling of an intake manifold of a four-stroke IC engine using contemporary software tools. Virtual 3D CAD model of an intake manifold was designed based on a real intake manifold of a four-stroke IC engine. Based on the CAD model a 3D CFD model of the intake manifold was created. The modeling has been done with the purpose of simulation of the air flow inside the intake manifold in order to monitor values of the internal pressure during several seconds of the engine operation in three different operating points. Also, an experiment was conducted, which included measurements of intake manifold pressure in the same engine operating points in the course of a time interval of approximately the same duration. The results of both the simulation and the experimental measurements have been shown in the paper proving that the created model was good enough for the intended purpose.

Combined Effects of Variable Intake Manifold Length, Variable Valve Timing and Duration on the Performance of an Internal Combustion Engine

2017 ◽  
Author(s):  
P. Sawant ◽  
S. Bari
Keyword(s):  
Combustion Engine ◽  
Engine Performance ◽  
Internal Combustion ◽  
Intake Manifold ◽  
Combined Effects ◽  
Performance Parameters ◽  
Intake Valve ◽  
Valve Timing ◽  
Ic Engine ◽  
Speed Range

Naturally aspirated internal combustion (IC) engines with a fixed intake assembly are generally tuned to produce an induction boost at a single engine speed by capitalizing the induction pressure waves only over a narrow speed range. This paper investigates the individual and combined effects of varying intake runner length and intake valve timing on the performance parameters of an IC engine at engine speeds from 3000 rpm to 9000 rpm. The 1-D model of the KTM SI engine built for simulations in Ricardo Wave software is validated with 98% accuracy against experimental test results. The performance parameters thus obtained, as a combined effect, show an average improvement of 7.02% throughout the engine’s speed range. With the co-existence of variable length intake runners and variable intake valve opening timing, the required number of variations to boost the engine performance are found to be reduced making variable intake assembly more feasible.

Robustness and Performance Optimization of Engine Bearing System Using Computer Model and Surrogate Noise

2004 ◽  
Author(s):  
Mikhail Ejakov ◽  
Agus Sudjianto ◽  
John Pieprzak
Keyword(s):  
Performance Optimization ◽  
Performance Metrics ◽  
Combustion Engine ◽  
Kriging Model ◽  
Main Bearing ◽  
Multiple Control ◽  
Ic Engine ◽  
And Performance ◽  
Noise Factors ◽  
Bearing System

Designing an internal combustion engine involves compromising among multiple performance metrics and targets with multiple control and noise factors. The main challenges are in determining the critical performance metrics, finding the optimal compromise between these metrics, and correctly represent the most important control and noise factors through CAE modeling and optimization. This paper presents a methodology for practical application of robustness and performance optimization using a CAE model. The key element of the methodology is a concept of surrogate noise. With this concept, the multiple noise factors affecting the system performance are represented through a limited number of noise factors for CAE modeling. The other part of the methodology is to substitute complicated and computationally time intensive CAE modeling with a cheap-to-compute Gaussian Kriging model through Optimal Sampling and Design of Experiment. The final part of the methodology is performing multi-criteria robustness and performance optimization as well as performance and robustness confirmation of the optimal design point. The proposed methodology has been applied to a practical problem of designing the IC engine main bearing system. The results of the analysis have provided practical recommendations and directions to drive the main bearing system design. In this paper, the methodology is demonstrated through the presentation of a simplified form of this investigation.

A Study of Cycle-to-Cycle Variations and the Influence of Charge Motion Control on In-Cylinder Flow in an IC Engine

2010 ◽  
Vol 132 (5) ◽  
Author(s):  
Mayank Mittal ◽  
Harold J. Schock
Keyword(s):  
Velocity Field ◽  
Probability Density ◽  
Motion Control ◽  
Combustion Engine ◽  
Control Valve ◽  
Multiple Point ◽  
Charge Motion ◽  
Ic Engine ◽  
Molecular Tagging Velocimetry ◽  
Cylinder Flow

An experimental study is performed to investigate the cycle-to-cycle variations and the influence of charge motion control on in-cylinder flow measurement inside an internal combustion engine assembly. Molecular tagging velocimetry (MTV) is used to obtain the multiple point measurement of the instantaneous velocity field. MTV is a molecular counterpart of particle-based techniques, and it eliminates the use of seed particles. A two-component velocity field is obtained at various crank angle degrees for tumble and swirl measurement planes inside an optical engine assembly (1500 rpm and 2500 rpm engine speeds). Effects of charge motion control are studied considering different cases of: (i) charge motion control valve (CMCV) deactivated and (ii) CMCV activated. Both the measurement planes are used in each case to study the cycle-to-cycle variability inside an engine cylinder. Probability density functions of the normalized circulation are calculated from the instantaneous planar velocity to quantify the cycle-to-cycle variations of in-cylinder flows. In addition, the turbulent kinetic energy of flow is calculated and compared with the results of the probability density function. Different geometries of CMCV produce different effects on the in-cylinder flow field. It is found that the charge motion control used in this study has a profound effect on cycle-to-cycle variations during the intake and early compression; however, its influence reduces during the late compression. Therefore, it can be assumed that CMCV enhances the fuel-air mixing more than the flame speed.

scholarly journals Recovery of Exhaust Waste Heat for ICE Using the Beta Type Stirling Engine

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Wail Aladayleh ◽  
Ali Alahmer
Keyword(s):  
Internal Combustion Engine ◽  
Waste Heat ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Stirling Engine ◽  
Gas Temperature ◽  
Ic Engine ◽  
Exhaust Waste Heat ◽  
Useful Power ◽  
Shaft Power

This paper investigates the potential of utilizing the exhaust waste heat using an integrated mechanical device with internal combustion engine for the automobiles to increase the fuel economy, the useful power, and the environment safety. One of the ways of utilizing waste heat is to use a Stirling engine. A Stirling engine requires only an external heat source as wasted heat for its operation. Because the exhaust gas temperature may reach 200 to 700°C, Stirling engine will work effectively. The indication work, real shaft power and specific fuel consumption for Stirling engine, and the exhaust power losses for IC engine are calculated. The study shows the availability and possibility of recovery of the waste heat from internal combustion engine using Stirling engine.

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