NEW TEST FACILITY
Attitude Test FacilityThe Gas Turbine Research Establishment (GTRE), Bangalore, has commissioned an Attitude Test Facility to carry out performance evaluation tests of lubrication system,
simulating the engine rotor system, bearing sealing arrangement, speeds and attitudes. The
performance of Kaveri engine lubrication system at various attitudes of the aircraft
during its aerobatic maneuvers has to be ensured in design and demonstrated by simulated
tests. The attitude test set-up consists of:
A rigid frame supporting a
movable engine base frame and a movable sub-frame with the trunnion mounting arrangement.
Each frame can be rotated 360° with reference to the other.
The test section coupled to
artouste gearboxes (step up) and hydraulic motors is mounted on the base frame of the
engine. The LP and HP shaft test sections are driven independently by hydraulic motors.
The test section consists of
Kaveri engine rotor support system along with gearbox and lubrication system.
The bearing seals of the
test section are pressurised by air pressure from an external compressed air system.
The operation of pitch and
roll movements of test section are also possible from control system.
The lubrication system
instrumentation is linked to data acquisition system. All the parameters can be seen
online during testing. These parameters are updated every two seconds. These data are
recorded for offline analysis.
The instrumentation and
measurements include all supply chamber pressures and scavenge temperatures of lubrication
system, air pressures at bearing seals, HP and LP spool speeds, vibration measurements at
different locations of test section, gearbox and support frames and eddy probe clearance
measurements at two locations on the shafts.