Use of Computational Techniques Applied to the Design and Performance Prediction of Diesel Engines

1997 ◽  
Author(s):  
Niall A. F. Campbell ◽  
J. Gary Hawley ◽  
Frank J. Wallace ◽  
Mike Wilson ◽  
Kian Banisoleiman
Keyword(s):  
Performance Prediction ◽  
Diesel Engines ◽  
Gas Flow ◽  
Flow Model ◽  
Computational Techniques ◽  
Cfd Analysis ◽  
Element Analysis ◽  
Thermal Boundary Conditions ◽  
Cycle Simulation ◽  
And Performance

Abstract Integrated computational techniques using cycle simulation, finite element analysis (FEA) and gas flow modelling are currently being applied to enhance the design of automotive diesel engines by obtaining more accurate representations of the thermal boundary conditions on the gas side of the combustion chamber. This paper details the methodology of such an approach focusing on the development of a zonal gas flow model, as opposed to a full CFD analysis, to provide a quicker and more flexible means of achieving spatial gas side heat transfer models.

On the Influence of Fluctuating Flow Rate Upon the Performance and Behaviour of Isothermal Reacting Systems

1998 ◽  
Vol 63 (6) ◽  
pp. 881-898
Author(s):  
Otakar Trnka ◽  
Miloslav Hartman
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Fluidized Bed Reactor ◽  
Computational Techniques ◽  
Continuous Stirred Tank Reactor ◽  
Gas Flow Rate ◽  
Solid Reaction ◽  
Continuous Stirred Tank ◽  
And Performance ◽  
Reacting Systems

Three simple computational techniques are proposed and employed to demonstrate the effect of fluctuating flow rate of feed on the behaviour and performance of an isothermal, continuous stirred tank reactor (CSTR). A fluidized bed reactor (FBR), in which a non-catalytic gas-solid reaction occurs, is also considered. The influence of amplitude and frequency of gas flow rate fluctuations on reactant concentrations at the exit of the CSTR is shown in four different situations.

scholarly journals Development of On-Board In-Cylinder Gas Flow Model for Heat Loss Estimation of Diesel Engines

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Mitsuhisa Ichiyanagi ◽  
Kazuki Kojima ◽  
Hayao Joji ◽  
Hiroki Matsui ◽  
Takashi Suzuki
Keyword(s):  
Heat Loss ◽  
Diesel Engines ◽  
Gas Flow ◽  
Flow Model ◽  
Loss Estimation

Thermal-Mechanical Effects of Ceramic Thermal Barrier Coatings on Diesel Engine Piston

2001 ◽  
Vol 697 ◽  
Author(s):  
Jesse G. Muchai ◽  
Ajit D. Kelkar ◽  
David E. Klett ◽  
Jagannathan Sankar
Keyword(s):  
Diesel Engine ◽  
Thermal Barrier Coatings ◽  
Coating Thickness ◽  
High Stress ◽  
Thermal Barrier ◽  
Element Analysis ◽  
Simulation Code ◽  
Barrier Coatings ◽  
Thermal Boundary Conditions ◽  
Cycle Simulation

AbstractThe purpose of this paper is to investigate the piston temperature and stress distribution resulting from varying coating thicknesses of Partially Stabilized Zirconia (PSZ) thermal barrier coatings for the performance in diesel engine applications. This analysis is based on the premise that coating thickness affects the heat transfer and temperature distribution in the piston. A gas dynamic engine cycle simulation code was used to obtain thermal boundary conditions on the piston then, a 2-D axisymmetric Finite Element Analysis (FEA) using ANSYS was performed to evaluate the temperature and stress distributions in the piston as a function of coating thickness. Coating thicknesses studied include 0.1, 0.2, 0.3, 0.5, 1.0, 1.5, and 2.0mm. The results indicate increased piston surface temperature with increasing coating thickness. The maximum stress on the coated piston surface was high while the substrate stress was less than the coating yield stress for all coating thicknesses. Further, the analysis showed that the interface stress at all coated conditions is low enough such that no separation of the coating is expected. The FEA results suggest an optimum coating thickness of 0.1 to 1.5 mm for diesel engine application to avoid unduly high stress in the ceramic.

Characteristics of Exhaust Gas Pulsation of Constant Pressure Turbo-Charged Diesel Engines

1980 ◽  
Vol 102 (4) ◽  
pp. 827-835 ◽  
Author(s):  
T. Azuma ◽  
Y. Tokunaga ◽  
T. Yura
Keyword(s):  
Diesel Engines ◽  
Gas Flow ◽  
Flow Model ◽  
Constant Pressure ◽  
Simulation System ◽  
Exhaust Gas ◽  
Effective Pressure ◽  
Charge System ◽  
Turbo Charge ◽  
Marine Diesel

The constant pressure turbo-charge system has now been increasingly adopted for marine diesel engines because of its higher thermal efficiency in the range of higher mean effective pressure. However, it seems that there has been no paper published on the exhaust gas pulsation of this sytem. In this study, a gas flow model of the constant pressure turbo-charged diesel engines was assumed as a basic and fundamental one, and an investigation was made of it. As a result, some characteristics of the exhaust gas pulsation of this system have been clarified and a mathematical simulation system has been established. It must be emphasized that the filling and emptying method which neglects wave propagation cannot simulate the pulsation, although it can simulate the average exhaust gas pressure and temperature of this system.

PRO/E Modeling and CFD Analysis of Diesel Engine Port

2012 ◽  
Vol 201-202 ◽  
pp. 763-766
Author(s):  
Liang Feng Zhang ◽  
Duo Chen ◽  
Ming Wei Liu
Keyword(s):  
Finite Element Analysis ◽  
Momentum Flux ◽  
Gas Flow ◽  
Optimization Theory ◽  
Current Level ◽  
Cfd Analysis ◽  
Flow Conditions ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis

Explore the influence of gas flow conditions geometry of the diesel spiral airway, which predict the performance of the design of the airway. And the direction of improvement and optimization theory, using CFD technology to explore such away preliminary attempt, based on Pro/E to build the model of airway fluid entity, and use a common geometric standard model into the finite element analysis software ANSYS to analyze to get the airway export velocity distribution, turbulent kinetic energy distribution and other results. It is assessed on eddy current level of Angular momentum flux, and airway improved.

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