Two Dimensional Numerical Simulation of Inlet Manifold Flow in a Four Cylinder Internal Combustion Engine

1979 ◽  
Author(s):  
Milt Chapman
Keyword(s):  
Numerical Simulation ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Two Dimensional ◽  
Inlet Manifold

Turbulence Anisotropy Investigations in an Internal Combustion Engine

2021 ◽  
Author(s):  
James R MacDonald ◽  
Claudia Fajardo
Keyword(s):  
Internal Combustion Engine ◽  
Isotropic Turbulence ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Two Dimensional ◽  
Velocity Data ◽  
Compression Stroke ◽  
Turbulence Anisotropy ◽  
Anisotropy Tensor ◽  
Component Velocity

Abstract The assumption of isotropic turbulence is commonly incorporated into models of internal combustion engine (ICE) in-cylinder flows. While preliminary analysis with two-dimensional velocity data indicates that the turbulence may tend to isotropy as the piston approaches TDC, the validity of this assumption has not been fully investigated, partially due to lack of three-component velocity data in ICEs. In this work, the velocity was measured using two-dimensional, three-component (2D-3C) particle image velocimetry in a single-cylinder, motored, research engine to investigate the evolution of turbulence anisotropy throughout the compression stroke. Invariants of the Reynolds stress anisotropy tensor were calculated and visualized, through the Lumley triangle, to investigate turbulence states. Results showed the turbulence to be mostly anisotropic, with preferential tendency toward 2D axisymmetry at the beginning of the compression stroke and approaching isotropy near top-dead-center. Findings provide new insights into turbulence in dynamic, bounded flows to assist with the development of physics-based, quantitative models.

scholarly journals The effect of injection timing parameters for liquid LPG fuel on selected operating parameters of the internal combustion engine

2007 ◽  
Vol 130 (3) ◽  
pp. 15-25
Author(s):  
Kazimierz LEJDA ◽  
Artur JAWORSKI ◽  
Adam USTRZYCKI
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Injection System ◽  
Operating Parameters ◽  
Injection Timing ◽  
Injection Parameters ◽  
Effi Ciency ◽  
Point Injection ◽  
Inlet Manifold

This article presents selected results of scientifi c research concerning the infl uence of the LPG fuel sequential injection parameters on the operating parameters of the internal combustion engine. Research was performed in the Department of Vehicles and IC Engines on SI MD-111E engine, which has been adapted to LPG fuel supply in multi-point injection system to the branches of the inlet manifold. During the research the sequential single and double injection were performed. The tests results obtained show very signifi cant infl uence of the injection parameters (onset of injection and size of the dose) on the engine operating parameters such as: engine power, torque end effi ciency.

Study of Energy-Saving Potential of Electronically Controlled Turbocharger for Internal Combustion Engine Exhaust Gas Energy Recovery

2016 ◽  
Vol 138 (11) ◽  
Author(s):  
Qijun Tang ◽  
Jianqin Fu ◽  
Jingping Liu ◽  
Feng Zhou ◽  
Xiongbo Duan
Keyword(s):  
Numerical Simulation ◽  
Internal Combustion Engine ◽  
Energy Recovery ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Utilization Efficiency ◽  
Exhaust Gas ◽  
Engine Exhaust ◽  
Valve Opening ◽  
Working Processes

To promote the energy utilization efficiency of internal combustion engine, the approach of electronically controlled turbocharger (ECT) for IC engine exhaust gas energy recovery was investigated by the method of test coupling with numerical simulation. First, the tests for turbocharged gasoline engine and high-speed motor were conducted so as to provide experimental data for numerical simulation. Then, the simulation model of ECT engine was built and calibrated, and the working processes of ECT engine were simulated. The results show that the recovered exhaust gas energy by ECT increases with the decrease of by-pass valve opening due to the rising of exhaust gas mass flow rate, but the pumping loss also ascends; limited by the original engine turbocharger map, the engine working points are beyond turbine map when the by-pass valve opening increases to a certain degree. To further improve the energy recovery potential of ECT, a larger turbine was rematched, and the working processes of ECT engine under the whole operating conditions were resimulated. The results indicate that engine exhaust gas energy cannot be recovered by ECT in low-load and low-speed area due to the low exhaust gas pressure. In the effective working area, as the load and speed ascend, both the recovery efficiency of ECT and the utilization efficiency of exhaust gas energy increase, and their maximum values reach 8.4% and 18.4%, respectively. All those demonstrate that ECT can effectively recover engine exhaust gas energy.

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