Computerized Micro Jet Engine Test Facility

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Computerized Micro Jet Engine

Test Facility

Vladimir Krapp ●

Yeshayahu Levy ●

Eliyahu Mashiah

Turbo and Jet Engine Laboratory

Technion

Flexible test bed for experiments

Turbo and Jet Engine Laboratory 9th _{Israeli Symposium on}

Jet Engines and Gas Turbines,

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Why micro‐jets?

• Basic physics similar to full scale engines

• Education

• UAVs

• Fun

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Turbo and Jet Engine Laboratory

9th _{Israeli Symposium on}

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• Measurements of engine performance

• Integrated control of operation and data

acquisition

• Easy expandability with additional equipment

System Capabilities

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System Components

Turbo and Jet Engine Laboratory

Data acquisition

and control

hardware

Engine on test stand

Sensors

PC running

LabVIEW

software

Control devices

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AMT Olympus engine

• Diameter: 130mm

• Length: 267mm

• Max. Thrust: 230N

• Representative of the whole

category of micro‐jets

• Used in scale models, as well

as in some less conventional

applications

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AMT Olympus engine

• Single spool

• Radial compressor

• Axial turbine

• Pressure ratio: 4:1

• Max. RPM: 108,000

• Compressed air start‐up

• Propane gas pre‐heating

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Measurement points

Jet Engines and Gas

Turbines,

AMT Olympus engine

Temperature

Measurement

Pressure

Measurement

P3

P03

P04

P05

T5

T4

T3

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Turbines,

AMT Olympus engine

Thermocouple

P3

P03

P04

P05

T5

T4

T3

Sensors

Analog Voltage

Signal

Pulse Counter

RPM sensor

Turbine

Fuel

Flow

Meter

Load

cell

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LabVIEW control software

• Graphical programming language

• Evolved specifically for measurement and control

• Rapid software development

• GUI inherent in program

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Program Front Panel

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Measurement of exhaust jet flow

parameters

100mm

500mm

Y

Section B

Section A

Engine

Exhaust

Jet

direction

‐X

X ax

is

Y axis

Probe

Jet

Thermocouple

Gas

Probe

Pitot

tube

Turbines,

Experiment

Traverse arms

Engine

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Turbines,

Experiment: probe setup

Thermocouple

Gas

Probe

Pitot

tube

Thermocouple Reader

Pressure Transducer

Portable Gas Analyzer

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Turbines,

Jet profile, 100mm downstream

100mm

Engine

Exhaust

80K RPM

Jet

direction

Test section

T(° )

P(bar)

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Turbines,

Jet profile, 100mm downstream

100mm

Engine

Exhaust

80K RPM

Jet

direction

Test section

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Turbines,

Jet temperature along axis ,

Engine

Exhaust

Jet

direction

Test section

T(

°)

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Jet pressure along axis,

various RPM

Engine

Exhaust

Jet

direction

Test section

P(bar)

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Comparison of theory and test result

Jet temperature along axis

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Comparison of theory and test result

Jet temperature –

500mm downstream

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High

Low

Thermal imaging of jet

Intensity of IR radiation level

T(

°)

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Future development

cRIO – reconfigurable input/output system

Includes a real time capable controller, with

interchangeable I/O modules:

analog and digital input and output

thermocouple input

step motor controller etc.

Various input

and output

modules

cRIO

2 nd

_{generation test stand}

electronics box:

Integrating power supplies,

connection routing,

data acquisition device (cRIO)

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Turbines,

Future development

Inlet Obstruction testing

A custom made inlet with attachable flow

disruption rings. Examination of flow inside the

inlet is made via pitot tube. Aim of project is to

examine effect of inlet obstructions

on the engine

operation parameters

Exhaust options

The Olympus engine allows for different

exhaust options, such as noise reduction

devices (above) or a reheat section.

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Turbines,

Summary

• A test bench was built with the capability to study the

characteristics of various micro‐turbine engines

• The system built is highly modular and flexible

• Useful experiments have already been performed

• Much is yet to be done, and we’ll be glad to cooperate on this

matter

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