Mineral-Metal, Multiphase Coatings to Protect Combustion Chamber Components Against Hot-Gas Corrosion and Thermal Loading

2011 ◽  
Vol 133 (10) ◽  
Author(s):  
Vadim Verlotski ◽  
Rudolf H. Stanglmaier ◽  
Günter Moormann ◽  
Ralph Geraets
Keyword(s):  
Combustion Chamber ◽  
Thermal Loading ◽  
Ceramic Coatings ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Hot Gas ◽  
Effective Manner ◽  
Gas Corrosion ◽  
Exhaust Valves ◽  
Highly Loaded

Many marine and stationary engines operate on fuels that contain corrosive elements, with the result that some highly loaded combustion chamber components must be replaced frequently. Märkisches Werk, GmbH (MWH) has pioneered the development of mineral-metal, multiphase coatings to protect valves and other highly loaded engine components against hot-gas corrosion. Mineral-metal, multiphase coatings are a unique and innovative approach to improving hot-gas corrosion resistance in a cost-effective manner. In general, these coatings combine the beneficial chemical and thermal attributes of ceramic coatings with the mechanical properties and substrate adhesion characteristics of a metal. Extensive laboratory and field trials have proven that MWH CrystalCoat protects heavy fuel oil (HFO) engine exhaust valves against hot-gas corrosion. It is projected that the newest coating formulation (CrystalCoat HT) will protect four-stroke HFO exhaust valves against hot-gas corrosion over their entire service life.

Mineral-Metal, Multi-Phase Coatings to Protect Combustion Chamber Components Against Hot-Gas Corrosion and Thermal Loading

2010 ◽  
Author(s):  
Vadim Verlotski ◽  
Rudolf H. Stanglmaier ◽  
Gu¨nter Moormann ◽  
Ralph Geraets
Keyword(s):  
Combustion Chamber ◽  
Thermal Loading ◽  
Ceramic Coatings ◽  
Field Trials ◽  
Hot Gas ◽  
Effective Manner ◽  
Gas Corrosion ◽  
Multi Phase ◽  
Exhaust Valves ◽  
Highly Loaded

Many marine and stationary engines operate on fuels that contain corrosive elements, with the result that some highly-loaded combustion chamber components must be replaced frequently. MWH has pioneered the development of mineral-metal, multi-phase coatings to protect valves and other highly-loaded engine components against hot-gas corrosion. Mineral-metal, multi-phase coatings are a unique and innovative approach to improving hot-gas corrosion resistance in a cost-effective manner. In general, these coatings combine the beneficial chemical and thermal attributes of ceramic coatings with the mechanical properties and substrate adhesion characteristics of a metal. Extensive laboratory and field trials have proven that MWH CrystalCoat protects HFO engine exhaust valves against hot-gas corrosion. It is projected that the newest coating formulation (CrystalCoat HT) will protect 4-stroke HFO exhaust valves against hot-gas corrosion over their entire service life.

Autoignition of Heavy Fuel Oil Sprays at High Pressures and Temperatures

1990 ◽  
Vol 112 (3) ◽  
pp. 324-330 ◽  
Author(s):  
R. S. G. Baert
Keyword(s):  
Combustion Chamber ◽  
Ignition Delay ◽  
High Pressures ◽  
Fuel Injection ◽  
Fuel Oil ◽  
Single Shot ◽  
Heavy Fuel Oil ◽  
Fuel Oils ◽  
Constant Volume Combustion Chamber ◽  
Heavy Fuel Oils

This paper reports on an experimental study of the autoignition behavior of several heavy fuel oils in a large constant-volume combustion chamber with single-shot injection. In the experiments the pressure and the temperature of the air in the combustion chamber before fuel injection varied between 30 and 70 bar and between 730 and 920 K. Illumination delay and pressure delay values have been correlated with these pressures and temperatures. It is shown that for all but one of the fuels examined, ignition delay ranking changes little with the choice of ignition delay definition, but more with the pressure and temperature conditions in the combustion chamber. The usefulness of the Calculated Carbon Aromaticity Index is discussed.

scholarly journals The Combustion of Emulsified Glycerol-Heavy Oil Fuel Droplet

2018 ◽  
Vol 5 ◽  
Author(s):  
S. Soulayman ◽  
K. Youssef
Keyword(s):  
Combustion Chamber ◽  
Crude Glycerol ◽  
Applied Pressure ◽  
Empirical Method ◽  
Fuel Oil ◽  
Biodiesel Production ◽  
Heavy Fuel Oil ◽  
Fuel Droplets ◽  
Temperature Combustion ◽  
Oil Fuel

In this work the evaporation of the emulsified glycerol- heavy fuel oil (CG-HFO) droplets with different activator is modeled. The influence of activator gas bubbles volume developments on the evaporation of fuel droplets in the high temperature combustion chamber is studied. The crude glycerol as the secondary product of biodiesel production is used as the first component of the emulsion while the second component is heavy fuel oil. The crude glycerol contains methanol, aromatics, minerals, a little bit biodiesel and water. These materials were pressurized and injected in the chamber with three inputs: the first one is for the CG-HFO, the second one is for activator while the third one is for air for forming the emulsion and then passing to the combustion chamber. The applied pressure is determined according to contents which lead to flame stability of the primary formed emulation. A comparison of calculated results, basing on semi-empirical method, with experimental ones demonstrates the modeling acceptable accuracy.

3D-CFD Lagrangian Spray Simulations for Large Two Stroke Marine Diesel Engines Compared With Experimental Data of a Spray Combustion Chamber

2012 ◽  
Author(s):  
M. Bolla ◽  
M. A. Cattin ◽  
Y. M. Wright ◽  
K. Boulouchos ◽  
R. Schulz
Keyword(s):  
Experimental Data ◽  
Combustion Chamber ◽  
Numerical Data ◽  
Swirl Flow ◽  
Fuel Oil ◽  
Spray Combustion ◽  
Fuel Quality ◽  
Heavy Fuel Oil ◽  
Marine Engines ◽  
Simulation Results

The behavior of lagrangian spray models for the application in large two stroke marine engines is investigated. 3D-CFD simulations of a Spray Combustion Chamber (SCC) with a single hole (0.875 mm diameter) injector are presented and compared with experimental results. Shadow images of the spray under evaporating and non-evaporating conditions, with and without swirl flow and for different chamber pressures are available by means of which the simulation results are validated. A novel post processing methodology for 3D CFD spray simulations is introduced, which converts the numerical data into images which allows for a more rigorous quantitative comparison with the experimental data. Good agreement of the simulation results with the experiment is reported both in terms of spray penetration as well as concerning the evaporation of the fuel. Since the appropriate discretization of the large volumes typical of 2-stroke marine engines presents a substantial challenge, the influence of the grid resolution is investigated. In addition, the influence of fuel quality on the evolution of the spray morphology is assessed. For this purpose, simulations with heavy fuel oil (HFO) are compared with experiment.

Formation of Deposits From Heavy Fuel Oil Ash in an Accelerated Deposition Facility at Temperatures Up to 1206°C

2017 ◽  
Author(s):  
Robert G. Laycock ◽  
Thomas H. Fletcher
Keyword(s):  
Gas Turbines ◽  
Gas Flow ◽  
Particle Diameter ◽  
Capture Efficiency ◽  
Fuel Oil ◽  
Nickel Base Superalloy ◽  
Gas Temperature ◽  
Heavy Fuel Oil ◽  
Hot Gas ◽  
Exhaust Stream

Some industrial gas turbines are currently being fired directly using heavy fuel oil, which contains a small percentage of inorganic material that can lead to fouling and corrosion of turbine components. Deposits of heavy fuel oil ash were created in the Turbine Accelerated Deposition Facility (TADF) at Brigham Young University under gas turbine-related conditions. Ash was produced by burning heavy fuel oil in a downward-fired combustor and collecting the ash from the exhaust stream. The mass mean ash particle diameter from these tests was 33 microns. This ash was then introduced into the TADF and entrained in a hot gas flow that varied from 1088 to 1206°C. The gas and particle velocity was accelerated to over 200 m/s in these tests. This particle-laden hot gas stream then impinged on a nickel base superalloy metal coupon approximately 3 cm in diameter, and an ash deposit formed on the coupon. Sulfur dioxide was introduced to the system to achieve 1.1 mol% SO2 in the exhaust stream in order to simulate SO2 levels in turbines currently burning heavy fuel oil. The ash deposits were collected, and the capture efficiency, surface roughness, and deposit composition were measured. The deposits were then washed with deionized water, dried, and underwent the same analysis. It was found that, as the gas temperature increased, there was no effect on capture efficiency and the post-wash roughness of the samples decreased. Washing aided in the removal of sulfur, magnesium, potassium, and calcium.

COOPER ALLOY 22W

Alloy Digest ◽  
1963 ◽  
Vol 12 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Creep Rate ◽  
Corrosion Rate ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
Casting Alloy ◽  
Hot Gas ◽  
Gas Corrosion ◽  
Very High

Abstract Cooper Alloy 22W is a high strength, heat resistant casting alloy with a low creep rate. It is recommended for heat applications where stress and hot gas corrosion rate are very high. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: SS-146. Producer or source: Cooper Alloy Corporation.

Biosorption of heavy fuel oil from aqueous solution by Eichhornia crassipes (Mart.) Solms in natura

2021 ◽  
Author(s):  
Laís A. Nascimento ◽  
Marilda N. Carvalho ◽  
Mohand Benachour ◽  
Valdemir A. Santos ◽  
Leonie A. Sarubbo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Eichhornia Crassipes ◽  
Fuel Oil ◽  
Heavy Fuel Oil

scholarly journals Oxidation and Hot Gas Corrosion of Al‐Cr‐Fe‐Ni‐Based High Entropy Alloys with Addition of Co and Mo

2021 ◽  
Author(s):  
Katharina Nicole Gabrysiak ◽  
Uwe Gaitzsch ◽  
Thomas Weißgärber ◽  
Bernd Kieback
Keyword(s):  
High Entropy Alloys ◽  
High Entropy ◽  
Hot Gas ◽  
Gas Corrosion

scholarly journals Numerical investigation of the aerodynamic breakup of Diesel and heavy fuel oil droplets

2017 ◽  
Vol 68 ◽  
pp. 203-215 ◽  
Author(s):  
Dionisis Stefanitsis ◽  
Ilias Malgarinos ◽  
George Strotos ◽  
Nikolaos Nikolopoulos ◽  
Emmanouil Kakaras ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Oil Droplets
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