Experimental and Computational Analysis of a Tuned Exhaust System for a Small Two-Stroke Engine

1999 ◽  
Author(s):  
F. Millo ◽  
A. Gallone ◽  
A. Mallamo
Keyword(s):  
Computational Analysis ◽  
Exhaust System ◽  
Stroke Engine

scholarly journals Turbogenerator: Part 1: Simulation

2018 ◽  
Vol 7 (3.15) ◽  
pp. 277
Author(s):  
Lev Yu. Lezhnev ◽  
Alexey P. Tatarnikov ◽  
Arсady A. Skvortsov ◽  
Igor A. Papkin ◽  
Aleksandr S. Nekrasov
Keyword(s):  
Mathematical Model ◽  
Power Generation ◽  
Comparative Analysis ◽  
Power Plants ◽  
Computational Analysis ◽  
Exhaust System ◽  
Electric Machine ◽  
Distributed Power Generation ◽  
Technical Solutions ◽  
Work Done

The article describes the process of developing a turbogenerator for power plants of small and distributed power generation. The analysis of the component base for the turbogenerator was carried out, and thereof a comparative analysis of possible technical solutions was conducted. The work considered the installation variants of a turbogenerator in the exhaust system, an electric machine of a turbogenerator, types of turbines of a generator. A mathematical model for computation of the output effective and geometric parameters of a turbogenerator was described. The results of computational analysis were presented, and the parameters of the turbogenerator being developed were selected. Based on the results of the work done the conclusions were made  

Exhaust Tuning of Large-Bore, Multicylinder, Two-Stroke, Natural Gas Engines

2006 ◽  
Vol 7 (2) ◽  
pp. 131-141 ◽  
Author(s):  
J Adair ◽  
D Olsen ◽  
A Kirkpatrick
Keyword(s):  
No Reduction ◽  
Numerical Technique ◽  
Computational Modelling ◽  
Exhaust System ◽  
Natural Gas Engines ◽  
Steepest Ascent ◽  
Modified Method ◽  
Stroke Engine ◽  
Peak Combustion Temperature ◽  
No Emissions

In this paper, computational modelling of the exhaust system of two types of large-bore, multicylinder, two-stroke engine is performed. The airflow performance of a four-cylinder V-bank Cooper GMV-4TF engine and a six-cylinder in-line Clark TLA engine is simulated. The simulation includes the computation of pressure wave propagation in the exhaust manifold. Using a modified method of the steepest ascent numerical technique, tuned exhaust manifolds are designed for each engine with the objective of reduced NO emissions. The NO reduction is accomplished by increasing the trapped cylinder mass and correspondingly reducing the peak combustion temperature. The simulations predict NO reductions in the range 10–30 per cent as a result of exhaust tuning.

Numerical Simulation Method Applied to the Multi-Expansion Exhaust System of a Two-Stroke Engine

1994 ◽  
Vol 208 (4) ◽  
pp. 281-288 ◽  
Author(s):  
J-S Chiou ◽  
M-S Chiang ◽  
C-K Chen
Keyword(s):  
Hyperbolic Equations ◽  
Exhaust System ◽  
Simulation Method ◽  
Exhaust Pipe ◽  
Inlet Pipe ◽  
Expansion Chamber ◽  
Pipe Model ◽  
Engine Cylinder ◽  
Cylinder Crankcase ◽  
Stroke Engine

A numerical method is presented to simulate the pressure wave in the multi-expansion exhaust system of a two-stroke engine. In the simulated processes, the inlet pipe, scavenge pipe and exhaust pipe of the two-stroke engine are simplifed by the pipe model, while the engine cylinder, crankcase and the expansion chamber are treated as the vessel model. The cubic-interpolated pseudo-particle (CIP) method combined with the method of characteristics (MOC) is used to solve the hyperbolic equations. The results from simulation compare reasonably well with the experimental data.

Computational Analysis of Performance of Smoke Exhaust System in Atrium Buildings with Nonuniform Spaces

2011 ◽  
Vol 250-253 ◽  
pp. 2993-2997
Author(s):  
Jun Mei Li ◽  
Yan Feng Li ◽  
Jing Sui ◽  
Shan Shan Liu ◽  
Xin Wang
Keyword(s):  
Fluid Dynamics ◽  
Experimental Data ◽  
Research Laboratory ◽  
Computational Analysis ◽  
Field Model ◽  
Exhaust System ◽  
Zone Model ◽  
Fire Models ◽  
Smoke Test ◽  
Analysis Of Performance

Performance of the smoke exhaust system in two atria with nonuniform spaces will be analyzed by fire models in this paper. A two-layer zone model and a Computational Fluid Dynamics field model FDS developed by the Building and Fire Research Laboratory, National Institute of Standards and Technology, USA are used. Numerical results are compared with the experimental data by hot smoke test in these two atria. Both fire models can give good predictions and so are suitable for evaluating the performance of the smoke exhaust system.

Exhaust Systems of Two-Stroke Engines

1938 ◽  
Vol 138 (1) ◽  
pp. 367-412 ◽  
Author(s):  
H. O. Farmer
Keyword(s):  
Marked Effect ◽  
Engine Performance ◽  
Exhaust System ◽  
The Self ◽  
Exhaust Pipe ◽  
Expansion Chamber ◽  
Engine Cylinder ◽  
Equivalent Length ◽  
Large Expansion ◽  
Stroke Engine

Crankcase-scavenge two-stroke engines have always been fitted with a large expansion chamber immediately outside the exhaust ports, but this is by no means essential, as such engines will operate very satisfactorily with a plain exhaust pipe. The length of this pipe is most important and has a controlling influence on the scavenging of the cylinder and the performance of the engine. Even when an expansion chamber is used in the exhaust system, the length of exhaust pipe still has a very marked effect on engine performance. It has been found that certain arrangements of this combination of expansion chamber and pipes completely upset the performance of the engine, whilst others improve the performance, but it is possible to calculate the “equivalent length” of any system of this nature, and so arrange matters that the exhaust system is a help rather than a hindrance to the engine. Though certain results have not been satisfactorily explained, the tests carried out do give a fairly clear indication of the way in which the engine performance is affected by the variations in pressure in the exhaust system. The concluding section gives a description of the principle on which the self-induction engine works, and indicates how use is made of the pressure variations or oscillations in the exhaust pipe to scavenge the engine cylinder, resulting in the complete elimination of the air pump on a two-stroke engine.

Demonstrating the Use of High-Blend Ethanol (E85) in Snowmobiles

2008 ◽  
Author(s):  
Gregory W. Davis
Keyword(s):  
Catalytic Converter ◽  
Exhaust System ◽  
Exhaust Emissions ◽  
Engine Noise ◽  
Innovative Methods ◽  
Performance And Emissions ◽  
Stroke Engine

Kettering University has developed a cleaner and quieter snowmobile using technologies and innovative methods which can be applied to existing snowmobile designs with a minimal increase in cost. Specifically, a commercially available snowmobile using a two cylinder, four-stroke engine has been modified to run on high-blend ethanol (E-85) fuel. Further, a new exhaust system which features a catalytic converter and mufflers to minimize engine noise and exhaust emissions was developed. A number of additional improvements have been made to the track to reduce friction and diminish noise. This paper provides details of the snowmobile development to make best use of E-85, documenting the results of these efforts on performance and emissions.

Exhaust System Simulation of a 2-Cylinder 2-Stroke Engine Including Heat Transfer Effects

2010 ◽  
Author(s):  
Dalibor Jajcevic ◽  
Matthias Fitl ◽  
Stephan Schmidt ◽  
Karl Glinsner ◽  
Raimund Almbauer
Keyword(s):  
Heat Transfer ◽  
System Simulation ◽  
Exhaust System ◽  
Transfer Effects ◽  
Heat Transfer Effects ◽  
Stroke Engine
Sign in / Sign up

Export Citation Format

Share Document