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 Numerical Investigation of the Characteristics of the In-Cylinder Air Flow in a Compression-Ignition Engine for the Application of Emulsified Biofuels

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1517
Author(s):  
Mohd Fadzli Hamid ◽  
Mohamad Yusof Idroas ◽  
Mazlan Mohamed ◽  
Shukriwani Sa'ad ◽  
Teoh Yew Heng ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Numerical Study ◽  
Guide Vane ◽  
Engine Performance ◽  
3D Analysis ◽  
Compression Ignition Engine ◽  
Ansys Fluent ◽  
Start Of Injection ◽  
Crank Angle ◽  
Start Of Combustion

This paper presents a numerical analysis of the application of emulsified biofuel (EB) to diesel engines. The study performs a numerical study of three different guide vane designs (GVD) that are incorporated with a shallow depth re-entrance combustion chamber (SCC) piston. The GVD variables were used in three GVD models with different vane heights, that is, 0.2, 0.4 and 0.6 times the radius of the intake runner (R) and these were named 0.20R, 0.40R and 0.60R. The SCC piston and GVD model were designed using SolidWorks 2017, while ANSYS Fluent version 15 was used to perform cold flow engine 3D analysis. The results of the numerical study showed that 0.60R is the optimum guide vane height, as the turbulence kinetic energy (TKE), swirl ratio (Rs), tumble ratio (RT) and cross tumble ratio (RCT) in the fuel injection region improved from the crank angle before the start of injection (SOI) and start of combustion (SOC). This is essential to break up the heavier-fuel molecules of EB so that they mix with the surrounding air, which eventually improves the engine performance.

Simulation and Experimental Investigation of Guide Vane Length to Improve the Performance of a Diesel Engine Run With Biodiesel

2016 ◽  
Vol 138 (11) ◽  
Author(s):  
S. Bari ◽  
Idris Saad
Keyword(s):  
Diesel Engine ◽  
Combustion Engine ◽  
Guide Vane ◽  
Flow Characteristics ◽  
Engine Performance ◽  
Compression Ignition ◽  
Guide Vanes ◽  
Performance And Emissions ◽  
Ci Engine ◽  
Engine Performance And Emissions

This research investigated the effect of guide vanes into the intake runner of a diesel engine run with higher viscous biodiesel to enhance the in-cylinder intake airflow characteristics. First, simulation of an internal combustion engine base model was done. Guide vanes of various lengths were developed and imposed into the intake runner to investigate the airflow characteristics. Based on the simulation results, five guide vanes models of 8, 10, 12, 14, and 16 mm length were constructed and tested on a compression ignition (CI) engine run with biodiesel. According to the experimental results of engine performance and emissions, it was found that guide vanes of 12 mm length showed the highest number of improvements with 14 mm and 10 mm length showed the second and third highest number of improvements, respectively. Therefore, this research concluded that guide vanes successfully improved the in-cylinder air flow characteristics to improve the mixing of higher viscous biodiesel with air resulting in better performances of the engines than without vanes.

scholarly journals Numerical Investigation of the Effect of Incorporated Guide Vane Length with SCC Piston for High-Viscosity Fuel Applications

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1328 ◽  
Author(s):  
Mohd Fadzli Hamid ◽  
Mohamad Yusof Idroas ◽  
Mazlan Mohamed ◽  
Shukriwani Sa'ad ◽  
Teoh Yew Heng ◽  
...  
Keyword(s):  
Guide Vane ◽  
Engine Performance ◽  
High Viscosity ◽  
Intake Manifold ◽  
Penetration Length ◽  
Ansys Fluent ◽  
Piston Bowl ◽  
Long Run ◽  
Cad Models ◽  
Ci Engines

Compression ignition (CI) engines that run on high-viscosity fuels (HVF) like emulsified biofuels generally demonstrate poor engine performance. An engine with a consistently low performance, in the long run, will have a negative effect on its lifespan. Poor combustion in engines occurs mainly due to the production of less volatile, less flammable, denser, and heavier molecules of HVF during injection. This paper proposes a guide vane design (GVD) to be installed at the intake manifold, which is incorporated with a shallow depth re-entrance combustion chamber (SCC) piston. This minor modification will be advantageous in improving the evaporation, diffusion, and combustion processes in the engine to further enhance its performance. The CAD models of the GVD and SCC piston were designed using SolidWorks 2018 while the flow run analysis of the cold flow CI engine was conducted using ANSYS Fluent Version 15. In this study, five designs of the GVD with varying lengths of the vanes from 0.6D (L) to 3.0D (L) were numerically evaluated. The GVD design with 0.6D (L) demonstrated improved turbulence kinetic energy (TKE) as well as swirl (Rs), tumble (RT), and cross tumble (RCT) ratios in the fuel-injected zone compared to other designs. The suggested improvements in the design would enhance the in-cylinder airflow characteristics and would be able to break up the penetration length of injection to mix in the wider area of the piston-bowl.

Optimize Vane Length to Improve In-Cylinder Air Characteristic of CI Engine Using Higher Viscous Fuel

2013 ◽  
Vol 393 ◽  
pp. 293-298 ◽  
Author(s):  
Idris Saad ◽  
Saiful Bari
Keyword(s):  
Internal Combustion Engines ◽  
Air Flow ◽  
Flow Characteristics ◽  
Internal Combustion ◽  
Combustion Efficiency ◽  
Cylinder Pressure ◽  
Ic Engine ◽  
Ci Engine ◽  
Ci Engines ◽  
Vane Angle

Environmental issues and the depletion of worldwide crude oil sources have developed the requirement for an alternative fuel to power internal combustion engines. Vegetable oil, waste cooking oil and biodiesel are all renewable, environmentally sustainable and compatible with current Compression Ignition (CI) engines with little to no engine modification necessary. These fuels however have a higher viscosity than conventional petro-diesel and may be referred to as Higher Viscous Fuels (HVF). HVF have reduced in-cylinder combustion efficiency when compared with petro-diesel which reduces the engine performance in terms of output power, torque and fuel efficiency. A possible solution to the reduced efficiency is through the use of a Guide Vane Swirl and Tumble Device (GVSTD). This device when installed in front of the air intake manifold may produce improved air flow characteristics. This improves the efficiency of the evaporation processes and air-fuel mixing and therefore improves overall combustion efficiency. The effect of GVSTDs on in-cylinder air flow was studied using 3D Internal Combustion (IC) engine simulation under motored engine conditions. This was done using ANSYS-CFX. The base model engine was adapted from the Hino W04D model CI engine. The model throughout all simulations was run at a constant speed of 1500 rpm. There are four parameters to consider for GVSTD models; vane length, vane height, vane angle and the number of vanes. For the purpose of this study, the vane height, vane angle and the number of vanes were maintained as constants leaving the vane length as the variable parameter. 11 GVSTD models were simulated each varying from 1.5 to 4.5 times the radius of the intake runner (R) in 0.3R increments. To analyze the air-flow characteristics, the maximum in-cylinder pressure, Turbulence Kinetic Energy (TKE) and velocity were measured. It was found that for the constant values for vane height, vane angle and the number of vanes of 0.2R, 35° twist angle and 4 perpendicularly-arranged respectively, the in-cylinder pressure, TKE and velocity were optimum for the vane lengths of 3.6 to 3.9 times R.

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.

Cold Flow Simulation of Helical Intake Manifold for Single Cylinder CI Engine

2016 ◽  
Vol 5 (1s) ◽  
pp. 353
Author(s):  
Deep Badheka ◽  
Vinay Nanani ◽  
Tejas Raval ◽  
Absar Lakdawala ◽  
Niraj Shah
Keyword(s):  
Flow Simulation ◽  
Intake Manifold ◽  
Single Cylinder ◽  
Cold Flow ◽  
Ci Engine

scholarly journals Performance Analysis of Diesel Engine using Moringa Oil Methyl Ester with Fumigation Technique

2020 ◽  
Vol 9 (3) ◽  
pp. 1783-1786
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Performance Analysis ◽  
Engine Performance ◽  
Nox Emission ◽  
Intake Manifold ◽  
Nox Emissions ◽  
Ci Engine ◽  
Biodiesel Blend ◽  
Moringa Oil

The paper investigated the effect of 1-hexanol fumigation in an engine performance using Moringa biodiesel blend. In this research, the biodiesel used is processed from Moringa Olifera seed. In this research tests were performed with the modification of a CI engine to carburet the hexanol into the intake manifold. Initially the experiment was conducted with diesel and Moringa biodiesel (MOME25), and then the test was conducted with various proportions of fumigated hexanol along with MOBD25. Results revealed that, the BTE was increased by 1.08% for MOBD25 with 10% n-hexanol fumigation compared with other diesel and other proportions of fumigations with MOBD25 blend. The NOx emission and smoke were diminished by 36% and 38% respectively for MOBD25 with 30% n-hexanol fumigation. It is concluded that 30% n-hexanol fumigation with MOBD25 blend drastically reduce the NOx emissions with the penalty of BTE.

scholarly journals Effect due to Variation in Bend Angles of Intake Manifold on Turbulent Kinetic Energy for Diesel Engine

2020 ◽  
Vol 9 (5) ◽  
pp. 1979-1982
Keyword(s):  
Diesel Engine ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Intake Manifold ◽  
Bend Angle ◽  
Optimized Design ◽  
Ansys Fluent ◽  
Combustion Processes ◽  
Bend Angles ◽  
Work Done

One of the positive results for enhancing turbulence is to improve swirl, which is an important factor of air motion in a diesel engine. Other than enhancing mixing and improvement in combustion processes it also influences heat transfer, combustion quality, and engine raw emissions. To improve swirl intensities in-cylinder parameters like velocity, pressure, temperature and turbulence intensity are to be considered. There are two ways to create a swirl, modification in the intake system and valve design. So this work done contains modifications in the design of manifold to enhance turbulence during the intake stroke. Designs of manifold having different bend angle of 15o , 30o , 45o , 60o and 75o were used, all parts of numerical analysis were carried out on Ansys Fluent. The 200mm long intake model having a 20 mm diameter, with a bend on 160mm along length was used to find out the best bend angle configuration from the above orientations. K-epsilon model was used to simulate flow dynamics; variations turbulent kinetic energy was studied. After analyzing these results it was concluded that best-optimized design (in terms of turbulent kinetic energy) to get better swirl was for 75o . This work gives the understanding to find new techniques for further improvement in mixing by increasing turbulent kinetic energy. This work emphasizes on the techniques to enhance turbulent kinetic energy of any flow, and can also be applied to different fields related to mixing of fluids other than diesel engine

scholarly journals A numerical study to improve the position and angle of the producer gas injector inside the intake manifold to minimize emissions and efficiency enhancement of a bi engine

2021 ◽  
pp. 100-109
Author(s):  
Hussein A. Mahmood ◽  
Ali O. Al-Sulttani ◽  
Osam H. Attia ◽  
Nor Mariah. Adam
Keyword(s):  
Numerical Simulation ◽  
Numerical Study ◽  
Single Point ◽  
Flow Characteristics ◽  
Engine Performance ◽  
Simulation Software ◽  
Petrol Engine ◽  
Intake Manifold ◽  
Producer Gas ◽  
The Impact

To develop a petrol engine so that it works under the bi-engine pattern (producer gas-petrol) without any additional engine modifications, a single-point injection method inside the intake manifold is a simple and inexpensive method. Still, it leads to poor mixing performance between the air and producer gas. This deficiency can cause unsatisfactory engine performance and high exhaust emissions. In order to improve the mixing inside the intake manifold, nine separate cases were modelled to evaluate the impact of the position and angle orientation inside the intake manifold on the uniformity and spread of the mixture under AFR=2.07. A petrol engine (1.6 L), the maximum engine speed (8000 rpm), and bi-engine mode (petrol-producer gas engine). The employ of the numerical simulation software (ANSYS workbench 19), the propagation, flow characteristics, and uniformity of the blend within the nine different cases were evaluated. According to the outcomes of the numerical simulation, it was found that creating vortices and turbulent flow for the producer gas and air inside the intake manifold is the perfect method to obtain a uniformity mixture of air and producer gas inside the intake manifold. In addition, extending the blending duration allows air and producer gas fuel to be mixed efficiently. Furthermore, the greatest uniformity and the maximum spread rate at the outlet of manifold are obtained in cases 1, 4, and 7, when the producer gas injector location is constant (P1, P2 or P3). In addition, the weakest spread of producer gas at the outlet of the manifold is observed in case 9 in comparison with the other cases. Moreover, it is observed that case (1) generated the maximum uniformity index (UI) level

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