Improvement of Gas Turbine Injection Systems by Combined Experimental/Numerical Approach

2002 ◽  
Author(s):  
G. Riccio ◽  
P. Adami ◽  
F. Martelli ◽  
D. Cecchini ◽  
L. Carrai
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Fuel Injection ◽  
Numerical Approach ◽  
Combustion Stability ◽  
Pollutant Emissions ◽  
Injection System ◽  
Flame Stability ◽  
Fuel Injection System ◽  
Joint Application

An aerodynamic study for the premixing device of an industrial turbine gas combustor is discussed. The present work is based on a joint application of numerical CFD and experimental investigation tools in order to verify and optimize the combustor gaseous fuel injection system. The objective is the retrofit of an old generation gas turbine combustion chamber that is carried out considering new targets of NOx emission keeping the same CO and combustion stability performances. CFD has been used to compare different premixing duct configurations for improved mixing features. Experimental test has been carried out in order to assess the pollutant emissions, flame stability and pattern factor characteristics of the full combustion chamber retrofitted with the modified injection system.

scholarly journals Organization of Six-Cylinder Tractor Diesel Working Process

2021 ◽  
Vol 20 (5) ◽  
pp. 427-433
Author(s):  
G. M. Kuharonak ◽  
M. Klesso ◽  
A. Predko ◽  
D. Telyuk
Keyword(s):  
Combustion Chamber ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Common Rail ◽  
Injection System ◽  
Fuel Injection System ◽  
Rotary Valve ◽  
Original Design ◽  
Working Process ◽  
Common Rail System

The purpose of the work is to consider the organization of the working process of six-cylinder diesel engines with a power of 116 and 156 kW and exhaust gas recirculation. The following systems and components were used in the experimental configurations of the engine: Common Rail BOSСH accumulator fuel injection system with an injection pressure of 140 MPa, equipped with electro-hydraulic injectors with seven-hole nozzle and a 500 mm3 hydraulic flow; direct fuel injection system with MOTORPAL fuel pump with a maximum injection pressure of 100 MPa, equipped with MOTORPAL and AZPI five-hole nozzle injectors; two combustion chambers with volumes of 55 and 56 cm3 and bowl diameters of 55.0 and 67.5 mm, respectively; cylinder heads providing a 3.0–4.0 swirl ratio for Common Rail system, 3.5–4.5 for mechanical injection system. The recirculation rate was set by gas throttling before the turbine using a rotary valve of an original design. The tests have been conducted at characteristic points of the NRSC cycle: minimum idle speed 800 rpm, maximum torque speed 1600 rpm, rated power speed 2100 rpm. It has been established that it is possible to achieve the standards of emissions of harmful substances: on the 116 kW diesel engine using of direct-action fuel equipment and a semi-open combustion chamber; on the 156 kW diesel using Common Rail fuel supply system of the Low Cost type and an open combustion chamber.

Emission and Performance of a Lean-Premixed Gas Fuel Injection System for Aeroderivative Gas Turbine Engines

1994 ◽  
Author(s):  
Timothy S. Snyder ◽  
Thomas J. Rosfjord ◽  
John B. McVey ◽  
Aaron S. Hu ◽  
Barry C. Schlein
Keyword(s):  
Gas Turbine ◽  
Fuel Injection ◽  
Pressure Ratio ◽  
Combustion Efficiency ◽  
Injection System ◽  
Test Facility ◽  
Fuel Injection System ◽  
Moderate Pressure ◽  
Single Digit ◽  
Lean Premixed

A dry-low-NOx, high-airflow-capacity fuel injection system for a lean-premixed combustor has been developed for a moderate pressure ratio (20:1) aeroderivative gas turbine engine. Engine requirements for combustor pressure drop, emissions, and operability have been met. Combustion performance was evaluated at high power conditions in a high-pressure, single-nozzle test facility which operates at full baseload conditions. Single digit NOx levels and high combustion efficiency were achieved A wide operability range with no signs of flashback, autoignition, or thermal problems was demonsuated. NOx sensitivities 10 pressure and residence time were found to be small at flame temperatures below 1850 K (2870 F). Above 1850 K some NOx sensitivity to pressure and residence Lime was observed and was associated with the increased role of the thermal NOx production mechanism at elevated flame temperatures.

Emission and Performance of a Lean-Premixed Gas Fuel Injection System for Aeroderivative Gas Turbine Engines

1996 ◽  
Vol 118 (1) ◽  
pp. 38-45 ◽  
Author(s):  
T. S. Snyder ◽  
T. J. Rosfjord ◽  
J. B. McVey ◽  
A. S. Hu ◽  
B. C. Schlein
Keyword(s):  
Gas Turbine ◽  
Residence Time ◽  
Fuel Injection ◽  
Pressure Ratio ◽  
Injection System ◽  
Test Facility ◽  
Fuel Injection System ◽  
Moderate Pressure ◽  
Single Digit ◽  
Lean Premixed

A dry-low-NOx, high-airflow-capacity fuel injection system for a lean-premixed combustor has been developed for a moderate pressure ratio (20:1) aeroderivative gas turbine engine. Engine requirements for combustor pressure drop, emissions, and operability have been met. Combustion performance was evaluated at high power conditions in a high-pressure, single-nozzle test facility, which operates at full base-load conditions. Single digit NOx levels and high combustion efficiency were achieved. A wide operability range with no signs of flashback, autoignition, or thermal problems was demonstrated. NOx sensitivities to pressure and residence time were found to be small at flame temperatures below 1850 K (2870°F). Above 1850 K some NOx sensitivity to pressure and residence time was observed and was associated with the increased role of the thermal NOx production mechanism at elevated flame temperatures.

scholarly journals Conceptual Studies of a Fuel-Flexible Low-Swirl Combustion System for the Gas Turbine in Clean Coal Power Plants

2010 ◽  
Author(s):  
Kenneth O. Smith ◽  
Peter L. Therkelsen ◽  
David Littlejohn ◽  
Sy Ali ◽  
Robert K. Cheng
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Fuel Injection ◽  
Pollutant Emissions ◽  
Injection System ◽  
Combustion System ◽  
High Hydrogen ◽  
Swirl Combustion ◽  
Auto Ignition

This paper reports the results of preliminary analyses that show the feasibility of developing a fuel flexible (natural gas, syngas and high-hydrogen fuel) combustion system for IGCC gas turbines. Of particular interest is the use of Lawrence Berkeley National Laboratory’s DLN low swirl combustion technology as the basis for the IGCC turbine combustor. Conceptual designs of the combustion system and the requirements for the fuel handling and delivery circuits are discussed. The analyses show the feasibility of a multi-fuel, utility-sized, LSI-based, gas turbine engine. A conceptual design of the fuel injection system shows that dual parallel fuel circuits can provide range of gas turbine operation in a configuration consistent with low pollutant emissions. Additionally, several issues and challenges associated with the development of such a system, such as flashback and auto-ignition of the high-hydrogen fuels, are outlined.

scholarly journals Research using the CNG fuel system from the petrol fuel system for the honda wave engine

2021 ◽  
pp. 69-75
Author(s):  
Nguyen Thanh Tuan ◽  
Le Minh Xuan ◽  
Nguyen Trung Hieu ◽  
Doan Phuoc Tho ◽  
Nguyen Phu Dong
Keyword(s):  
Combustion Chamber ◽  
Fuel Injection ◽  
Supply System ◽  
Injection System ◽  
Fuel Injection System ◽  
Test Results ◽  
Fuel System ◽  
Fuel Supply ◽  
Engine Combustion ◽  
Design And Manufacture

The article presents research on Honda wave motorcycle engines using CNG gas based on a corresponding gasoline fuel injection system. In the study, we choose a solution using two nozzles suitable when switching to using CNG fuel. According to the throttle opening, the test results are conducted and can confirm that the engine, when using CNG, has reduced power and torque compared to gasoline. However, using a CNG fuel supply system from the fuel injection system saves time and cost of design and manufacture. The installation is simple, no need to interfere with the engine combustion chamber. As a result, the engine on the car operates reliably, stably, and reliably.

Experimental Investigation of a New Concept of Fuel Prevaporization

1976 ◽  
Vol 98 (3) ◽  
pp. 305-308
Author(s):  
G. Kappler ◽  
G. Kirschey ◽  
A. Fehler
Keyword(s):  
Fuel Injection ◽  
Soot Formation ◽  
Pollutant Emissions ◽  
Injection System ◽  
Outlet Temperature ◽  
Fuel Injection System ◽  
Droplet Combustion ◽  
Aircraft Engines ◽  
Low Velocity ◽  
Promising Development

The established emission standards for aircraft engines require the development of low emission combustors which incorporate new concepts of fuel prevaporization and pre-mixing systems. At MTU-Muenchen a fuel injection system was designed which greatly suppresses droplet combustion and avoids burning at stoichiometric air fuel ratios. Thereby the large quantities of NO produced at adiabatic peak temperatures are omitted and soot formation as a result of low velocity droplet combustion is avoided. Tests with a combustor incorporating the fuel injection system yielded high combustion efficiencies, improved combustor outlet temperature distributions and low pollutant emissions. Comparing the measured emission indices for CO, NO, and unburned HC with values required for civil aircraft engines showed a promising development potential of achieving the standards.

Design and Development of Electronic Fuel Injection System for Vegetable Methyl Ester Operated DI CI Engine

2014 ◽  
Vol 984-985 ◽  
pp. 831-838
Author(s):  
Ramalingam Senthil ◽  
C. Paramasivam ◽  
Rajendran Silambarasan
Keyword(s):  
Combustion Chamber ◽  
Nitrogen Oxide ◽  
Fuel Injection ◽  
Single Injection ◽  
Methyl Esters ◽  
Injection System ◽  
Fuel Injection System ◽  
Nitrogen Oxide Emission ◽  
Injection Method ◽  
Chamber Temperature

The methyl esters of vegetable oils known as biodiesel are fetching more and more attraction because of the low environmental impact and potential as a green alternative fuel for diesel engine and they would not require significant modification of existing engine. Methyl esters of Jatropha (JME) are derived through transesterification process. Experimental investigations have been carried out to examine properties, performance and emission of different blends of JME. Result indicated that B20 have closer performance to diesel. The use of these methyl esters gives lower smoke, CO and HC but the Nitrogen Oxide emission is more. However to reduce the Nitrogen Oxide emission in diesel and various vegetable oil esters by lowering the combustion chamber temperature, Electronic fuel injection method is adopted. The study was carried out in a single cylinder 8 H.P running at 1800 rpm using the diesel, JME by the method of normal and Electronic Fuel Injection system and the result are compared between them. The result indicates that the Nitrogen Oxide emission is less for Electronic fuel injection method than the single injection. This helps to lower the combustion chamber temperature considerably, and hence the chance of generating the Nitrogen Oxide is minimized compared to the single injection.

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