Investigation and Computer Simulation of Diesel Injection System With Rotative Pump

1990 ◽  
Vol 112 (3) ◽  
pp. 317-323 ◽  
Author(s):  
A. Ficarella ◽  
D. Laforgia ◽  
G. Cipolla
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Conservation Laws ◽  
Momentum Conservation ◽  
Experimental Results ◽  
Injection System ◽  
Experimental Investigations ◽  
System Behavior ◽  
Diesel Injection ◽  
Theoretical Predictions

The behavior of an injection system with a rotative pump for reciprocating engines has been investigated. Experimental investigations were carried out using a specially designed apparatus to monitor several parameters, such as pressure inside the different chambers of the apparatus, moving part lift, and injected fuel quantity. In addition, a predictive mathematical model, based on mass momentum conservation laws, was developed to simulate such behavior and to predict all the most important parameters of the injection system. The comparison between numerical and experimental results has been satisfactory, allowing a generalization of the model and extensive theoretical predictions of the system behavior.

scholarly journals Modeling of Pressure Drop During Refrigerant Condensation in Pipe Minichannels

2017 ◽  
Vol 38 (4) ◽  
pp. 15-28 ◽  
Author(s):  
Małgorzata Sikora ◽  
Tadeusz Bohdal
Keyword(s):  
Mathematical Model ◽  
Pressure Drop ◽  
Computer Modeling ◽  
Experimental Verification ◽  
Flow Resistance ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Flow Conditions ◽  
Conservation Equations ◽  
Mathematical And Computer Modeling

Abstract Investigations of refrigerant condensation in pipe minichannels are very challenging and complicated issue. Due to the multitude of influences very important is mathematical and computer modeling. Its allows for performing calculations for many different refrigerants under different flow conditions. A large number of experimental results published in the literature allows for experimental verification of correctness of the models. In this work is presented a mathematical model for calculation of flow resistance during condensation of refrigerants in the pipe minichannel. The model was developed in environment based on conservation equations. The results of calculations were verified by authors own experimental investigations results.

Effects of Ammonia Gas Mixed Into Intake Air on Combustion and Emissions Characteristics in Diesel Engine

2016 ◽  
Author(s):  
Yoichi Niki ◽  
Dong-Hoon Yoo ◽  
Koichi Hirata ◽  
Hidenori Sekiguchi
Keyword(s):  
Diesel Engine ◽  
Catalytic Reduction ◽  
Gas Injection ◽  
Experimental Results ◽  
Injection System ◽  
Emission Characteristics ◽  
Diesel Injection ◽  
Injection Quantity ◽  
Carbon Dioxide Co2 ◽  
Scr System

This paper reports on the experimental results of the combustion and emission characteristics of a conventional diesel engine mixed ammonia (NH3) gas into the intake air, and discusses its usability. In the experiments, NH3 gas was injected into the intake pipe of the diesel engine by a gas injector. The diesel engine has a natural aspiration single cylinder with 7.7 kW rated power at 1500 rpm and a diesel injection system to inject diesel fuel into the cylinder. As experimental results on the combustion characteristics, it was confirmed that the compression and maximum pressures in the cylinder decreased and the ignition timing delayed with increasing the NH3 gas injection quantity. On the emission characteristics in the exhaust gas, NH3, water (H2O) and nitrous oxide (N2O) increased and carbon dioxide (CO2) decreased proportionally to the NH3 gas injection quantity. In contract, the nitrogen oxide (NO) was nearly the same. Moreover, it was confirmed that NH3 can be reduced by reacting with NO in a selective catalytic reduction (SCR) system.

Simulation of reciprocating gas compressors with automatic reed valves

SIMULATION ◽  
1967 ◽  
Vol 8 (4) ◽  
pp. 209-214 ◽  
Author(s):  
M.W. Wambsganss ◽  
Donald Coates ◽  
Raymond Cohen
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Steady State ◽  
Dynamic Behavior ◽  
High Speed ◽  
Experimental Results ◽  
The Other ◽  
Reciprocating Compressor ◽  
Trial And Error ◽  
State Tests

The simulation of high-speed reciprocating refrigeration compressors was motivated by the needs of design engi neers. In this paper a mathematical model describing the dynamic behavior of a reciprocating compressor is pre sented. The model is semianalytic in that two types of empirical factors are required to relate phenomena not yet analytically predictable. One type is obtained from steady- state tests and the other by trial and error based on com parison with experimental results. Both analog and digital computers were considered as means of simulating the model. Due to nonlinearities in the model, the digital com puter, using Fortran IV, was selected. To evaluate the sim ulation, a one-quarter horsepower 3600-rpm stock com pressor was modified and used as a laboratory vehicle. A typical correlation between the computer simulation and experimental results is given. In general, good correlation was achieved.

scholarly journals Experimental investigations of chatter and critical cutting conditions in turning

2021 ◽  
Author(s):  
Vipul Shah
Keyword(s):  
Cutting Force ◽  
Orthogonal Cutting ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Force Model ◽  
Cutting Force Model ◽  
The Arts ◽  
Dynamic Cutting Force ◽  
Theoretical Predictions ◽  
Series Of Experiments

Vibration can cause problems when it occurs during machining, especially if it cannot be damped and continuous to increase, a phenomenon known as chatter. This thesis project focuses on reviewing the state-of-the-arts work in chatter research, identifying a reliable mechanistic dynamic cutting force model for orthogonal cutting operations when machining slender shafts, carrying out a series of experiments on uniform and stepped workpiece[s], and validating the theoretical predictions of chatter onset conditions against experimental results.

A Study on the Modelling and Simulation of Part Motion in Vibratory Feeding

2010 ◽  
Vol 34-35 ◽  
pp. 2006-2010
Author(s):  
L. Han ◽  
J.X. Gao
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Modelling And Simulation ◽  
Experimental Results ◽  
Feeding System ◽  
Assembly Automation ◽  
Simulation Results ◽  
Part Motion ◽  
Vibratory Feeding

It is known that vibratory feeders are the most versatile of all hopper feeding devices for small engineering parts and play a key role in assembly automation. This work develops a mathematical model of the part motion in vibratory feeding, from which how the part works can be better known. A computer simulation programmed with MATLAB has been made to predict the conveying velocity of the parts in vibration feeding system, and furthermore, experiments have been carried out for verification purpose. The experimental results show that the simulation results are reasonable, and hence can be used to improve the design of vibratory feeding system.

scholarly journals Experimental investigations of chatter and critical cutting conditions in turning

2021 ◽  
Author(s):  
Vipul Shah
Keyword(s):  
Cutting Force ◽  
Orthogonal Cutting ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Force Model ◽  
Cutting Force Model ◽  
The Arts ◽  
Dynamic Cutting Force ◽  
Theoretical Predictions ◽  
Series Of Experiments

Vibration can cause problems when it occurs during machining, especially if it cannot be damped and continuous to increase, a phenomenon known as chatter. This thesis project focuses on reviewing the state-of-the-arts work in chatter research, identifying a reliable mechanistic dynamic cutting force model for orthogonal cutting operations when machining slender shafts, carrying out a series of experiments on uniform and stepped workpiece[s], and validating the theoretical predictions of chatter onset conditions against experimental results.

Computer Simulation of the Response of Amperometric Biosensors in Stirred and non Stirred Solution

2003 ◽  
Vol 8 (1) ◽  
pp. 3-18 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
J. Kulys
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Finite Difference ◽  
Mass Transport ◽  
Enzyme Reaction ◽  
Analyte Concentration ◽  
Amperometric Biosensors ◽  
Finite Difference Technique ◽  
Enzyme Layer ◽  
Biosensor Response

A mathematical model of amperometric biosensors has been developed to simulate the biosensor response in stirred as well as non stirred solution. The model involves three regions: the enzyme layer where enzyme reaction as well as mass transport by diffusion takes place, a diffusion limiting region where only the diffusion takes place, and a convective region, where the analyte concentration is maintained constant. Using computer simulation the influence of the thickness of the enzyme layer as well the diffusion one on the biosensor response was investigated. The computer simulation was carried out using the finite difference technique.

Sign in / Sign up

Export Citation Format

Share Document