Design and Operation of a High-Pressure Combustion System for Study of Soot Formation

1992 ◽  
Author(s):  
M. A. A. Nazha ◽  
R. J. Crookes
Keyword(s):  
High Pressure ◽  
Soot Formation ◽  
Combustion System

scholarly journals Investigating the Effects of Chemical Mechanism on Soot Formation Under High-Pressure Fuel Pyrolysis

2021 ◽  
Vol 7 ◽  
Author(s):  
Nick J. Killingsworth ◽  
Tuan M. Nguyen ◽  
Carter Brown ◽  
Goutham Kukkadapu ◽  
Julien Manin
Keyword(s):  
High Pressure ◽  
Soot Formation ◽  
Kinetic Mechanism ◽  
Chemical Kinetic ◽  
Chemical Mechanism ◽  
Navier Stokes ◽  
Chemical Mechanisms ◽  
Constant Volume Combustion Chamber ◽  
Fuel Pyrolysis ◽  
Soot Model

We performed Computational Fluid Dynamics (CFD) simulations using a Reynolds-Averaged Navier-Stokes (RANS) turbulence model of high-pressure spray pyrolysis with a detailed chemical kinetic mechanism encompassing pyrolysis of n-dodecane and formation of polycyclic aromatic hydrocarbons. We compare the results using the detailed mechanism and those found using several different reduced chemical mechanisms to experiments carried out in an optically accessible, high-pressure, constant-volume combustion chamber. Three different soot models implemented in the CONVERGE CFD software are used: an empirical soot model, a method of moments, and a discrete sectional method. There is a large variation in the prediction of the soot between different combinations of chemical mechanisms and soot model. Furthermore, the amount of soot produced from all models is substantially less than experimental measurements. All of this indicates that there is still substantial work that needs to be done to arrive at simulations that can be relied on to accurately predict soot formation.

Effect of Mixing Quality on NOx Emissions in Reheat Combustion of GT24 and GT26 Engines

2011 ◽  
Author(s):  
K. Michael Du¨sing ◽  
Andrea Ciani ◽  
Adnan Eroglu
Keyword(s):  
High Pressure ◽  
Development Process ◽  
Flow Characteristic ◽  
Water Channel ◽  
Cost Effective ◽  
Nox Emissions ◽  
Combustion System ◽  
Low Pressure Turbine ◽  
Effective Development ◽  
System 1

Alstoms GT24 and GT26 engines feature a unique sequential combustion system [1, 2]. This system consists of a premixed combustor (called EV), which is followed by a high pressure turbine, a reheat combustor (called SEV) and a low pressure turbine (Figure 1). Recently improvements in NOx performance of the SEV have been demonstrated. Starting with relatively simple methods numerous design variants have been tested and down selected. Further down-selection has been done with methods of increased complexity. Overall a fast and cost effective development process has been assured. During the development process the variation coefficient and unmixedness measured and calculated for mixing only systems (CFD and water channel) has proven to be a reliable indicators for low NOx emissions for the real combustion system on atmospheric and high pressure test rigs. To demonstrate this a comparison of both quantities against NOx emissions is shown. The paper focuses on the NOx results achieved during this development and its relation to mixing quantities. Using this relation, together with a detailed understanding of the flow characteristic in the SEV burner, reductions in NOx emissions for GT24 and GT26 SEV burner and lance hardware can be reached using relatively simple methods.

Fast Burning and Reduced Soot Formation via Ultra-High Pressure Diesel Fuel Injection

1991 ◽  
Author(s):  
Haruyuki Yokota ◽  
Takeyuki Kamimoto ◽  
Hidenori Kosaka ◽  
Kinji Tsujimura
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Soot Formation ◽  
Ultra High Pressure ◽  
Diesel Fuel Injection

Characterisation of the Soot Formation Processes in a High Pressure Combusting Diesel Fuel Spray

2003 ◽  
Author(s):  
R. E. Morgan ◽  
M. R. Gold ◽  
O. Laguitton ◽  
C. Crua ◽  
M. R. Heikal
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Soot Formation ◽  
Fuel Spray ◽  
Formation Processes

Combustion System Development and Testing for MAN’s New Industrial Gas Turbines MGT 6100 and MGT 6200

2014 ◽  
Author(s):  
Frank Reiss ◽  
Sven-Hendrik Wiers ◽  
Ulrich Orth ◽  
Emil Aschenbruck ◽  
Martin Lauer ◽  
...  
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Test Facility ◽  
Combustion System ◽  
Test Rig ◽  
Low Emission ◽  
Pressure Test ◽  
Industrial Gas Turbines ◽  
And Performance

This paper describes the development and test results of the low emission combustion system for the new industrial gas turbines in the 6–7 MW class from MAN Diesel & Turbo. The design of a robust combustion system and the achievement of very low emission targets were the most important design goals of the combustor development. During the design phase, the analysis of the combustor (i.e. burner design, air distribution, liner cooling design) was supported with different CFD tools. This advanced Dry Low Emission can combustion system (ACC) consists of 6 cans mounted externally on the gas turbine. The behavior and performance of a single can sector was tested over a wide load range and with different boundary conditions; first on an atmospheric test rig and later on a high pressure test rig with extensive instrumentation to ensure an efficient test campaign and accurate data. The atmospheric tests showed a very good performance for all combustor parts and promising results. The high pressure tests demonstrated very stable behavior at all operation modes and very low emissions to satisfy stringent environmental requirements. The whole operation concept of the combustion system was tested first on the single-can high pressure test bed and later on twin and single shaft gas turbines at MAN’s gas turbine test facility. During the engine tests, the can combustors demonstrated the expected combustion performance under real operation conditions. All emissions and performance targets were fully achieved. On the single shaft engine, the combustors were running with single digit ppm NOx levels between 50% and 100% load. The validation phase and further optimization of the gas turbines and the engine components are ongoing. The highlights of the development process and results of the combustor and engine tests will be presented and discussed within this paper.

Experimental and numerical study on soot formation in laminar high-pressure flames

1998 ◽  
Vol 27 (1) ◽  
pp. 1565-1572 ◽  
Author(s):  
M. Braun-Unkhoff ◽  
A. Chrysostomou ◽  
P. Frank ◽  
E. Gutheil ◽  
R. Lückerath ◽  
...  
Keyword(s):  
High Pressure ◽  
Soot Formation ◽  
Numerical Study
Sign in / Sign up

Export Citation Format

Share Document