Characteristics of fuel gas turbine engine system. Engine Controls.
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Characteristics of fuel gas turbine engine system. Engine Controls.

The characteristics of the fuel system of GTE

The test determines the characteristics of the fuel system and its performance confirmed units in a predetermined time, including without purification in the fuel filter. To this is added a certain amount of fuel contaminants. Checks and operation units in the fuel saturated with water over the entire operating range of flow rates and pressures.

To test the possibility of cavitation erosion of parts during tests must be reproduced conditions conducive to its occurrence, particularly to saturate the fuel with air in accordance with the expected operating conditions. Defining characteristics of cavitation units should be carried out on the "fresh" fuel supplied from a separate tank to the fuel gas saturation did not decrease during the tests.

It is very effective in detecting defects vibration tests are functioning ACS units (vibration test). Sinusoidal vibrations brings to 30% defects, and random vibration for a short time - more than 80% of defects. When testing the impact of vibration on one axis revealed about 60%. .70% Defects along two axes - 70%. .90%, And in three - to 95%.

Semi-permanent test stands with feedback allow to conduct research of the characteristics of ACS and its separate units when operating in a closed circuit. This is ensured by conjugation of the automatic control system with a mathematical model of GTD operating in real time. The basis of the stand is a DC-controlled electric drive for pumps, regulators, sensors and other drive devices and a computer complex with a mathematical model of the engine that allows to reproduce its characteristics for all regulated parameters and control organs. The work of the stand is provided by a number of technological systems: fuel, air (for high pressure and vacuum), oil, water supply, ventilation, fire extinguishing.

The signals characterizing the change of the measured parameters in the ACS for the regulation and control come from the model to move in!

ure by converters imitators sensor output signals which correspond to the characteristics obtained from sensors ACS. These signals are fed to the inputs of the control system units (electronic, hydro-mechanical, pneumatic) and electric control unit serving to simulate the rotation of the motor shafts. One shaft of the electric motor rotation is transmitted to the gearbox, and through it - to the drive units ACS and fuel systems installed on the stand.

Regulators engine

Regulators engine stand, as when working on the engine to interact with all the devices included in the ACS (converters, pumps, actuators of mechanization of the engine running), forming a feedback control on the motor. To enter into the mathematical model of the engine signals characterizing these effects, on the stand, there are converters, make the necessary transformation and standardization of regulatory factors.

Pressures on regulators engine simulated with the help of the power load. Payment dynamic errors bench inverter is built into a computer program providing speakers stand stand. The complex stand equipment includes devices for the job of external influences on the equipment ACS (shaker, thermal vacuum chamber). Analysis of the results of tests, including rapid analysis provides an automated system for collecting and processing information.

Power electrical power stand is 20. .600 KW Accuracy of the speed at steady state 0,1%. .0,2%, Range sustaining speed 10%. .110%, While changing the speed of 5% to 100% - 0,5. .0,8 With. Physical speed output shafts of the drive match the rotor speed of the engine management system which is being tested on the stand.

The hydraulic load power controls used plunger pumps controlled performance (the number of loaded drive) that can be operated separately and in parallel, each per customer. The working fluid in the system - with pressure slurry Samoletnaya mouths = 21 MPa, and volumetric flow rate of liquid Q = 1. 8 l / s.

The required accuracy of the reproduction characteristics of the engine by means of a mathematical model of Metal 1%. .3% At steady speeds and 5%. .7% - Transient.

At the stand of ACS units can be installed in two ways: through a full play to the engine layout units (this can be used by the engine simulator, drive shaft through which the gear on electric stand) or separately installed standard gearbox.

These boards allow you to define the characteristics of systems and components on the steady and transient modes in the closed and open circuits, analysis of available reserves of stability control to perform testing of the interaction of individual circuits and assemblies, to investigate the effect of disturbances and external factors, the ACS operation in case of failure.

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