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The PSL has supported Turbine-Based Combined Cycle Systems
(TBCC), SR–71, F–5E/–5F, F–5A/B, C–9, F–15, F–16,
EF–111A, A–10A, B52, F/A–18, F–22, and
ECLIPSE.
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The
Propulsion Systems Laboratory is NASA's only ground-based test facility
that can provide true flight simulation for experimental research
on air-breathing propulsion systems.
Characteristics
and Performance
- Altitude simulation to 90,000 ft
- Two
engine test cells: PSL-3 and PSL-4
- Mach
Number Range:
- PSL-3:
to 3.0
- PSL-4:
to 4.0
- PSL-4:
Freejet Mach No. with auxiliary heater - to 6.0
- Tied
to central compressed air and exhaust systems
- Thrust
measurement: 50,000 lbf horizontal axis, 15,000 lbf vertical and
lateral axes
Combustion
Air System
- Main
Supply
- 480
lbs/sec @ ambient temperature and 55 psia
- 380
lbs/sec @ ambient temperature and 165 psia
- 240
lbs/sec @ 1100°F and 165 psia
- 380
lbs/sec @ -40°F and 25 psia (PSL-3)
- 30
lbs/sec @ -90°F and 25 psia (PSL-4)
- Cooling
Air Supply
- 100
lbs/sec @ ambient temperature and 55 psia
- 100
lbs/sec @ ambient temperature and 165 psia
- 100
lbs/sec @ ambient temperature and 450 psia
Altitude
Exhaust System
- Altitude
Range: sea level standard to 90,000 ft
- Mass
Flow: up to 750 lbs/sec
Support
Systems
- Jet
Fuel System: Two 25,000 gallon tanks supporting various types
of fuel (JET-A, JP-4, JP-5, JP-8)
- Natural
Gas system: 10 inch header @ 50 psig
- Gaseous
Hydrogen System: 1 lb/sec @ 600 psig -- 3 lbs/sec @ 1100 psig,
maximum pressure is 2400 psig
- Gaseous
Oxygen System: 3 lbs/sec @ 1200 psig, 10 lbs/sec @ 400 psig, maximum
pressure is 2400 psig
- Gaseous
Nitrogen System: 132,000 scf @ 2400 psig
- Hydraulic
System: 100 gpm @ 3000 psig
- High
Pressure Hydraulic System: 100 gpm @ 6000 psig
Data
Acquisition
- Steady
State Acquisition
Escort, the steady state data acquisition system, uses a DEC Alpha microprocessor to provide:
- An X window based system
- Real time on-line acquisition of analog signals
- Conversion of raw 10Hz filtered digitized Neff data to engineering units
- Computed performance calculations, which can be displayed in a variety of tabular and graphical formats.
- Limit checking on all selected changes
- 1 second update rate
Escort can stand alone to meet all secure test requirements or it can be connected to a central processing cluster, which facilitates software application development, downloading of software, uploading and storage of facility tables, post processing of data and transmitting of data to a data collector for archival storage. ESP is an off the shelf electronically scanned pressure system. The system consists of numerous 32 port, rack mounted modules from +/-2.5 PSID to +500 PSID, located outside the test chamber. Each module has a check pressure to assure the module is performing correctly and can be calibrated in place using up to 5 highly accurate calibration pressures to maintain the overall system accuracy of +/-0.05% of range. This calibration is performed every 2 hours.
Salient characteristics specific to the PSL data acquisition system are:
- Accuracy for the Neff 400 is +/- 0.05% of range while the accuracy for the Neff 600 is +/- 0.02% of range + 2µv
- 576 ports of electronically scanned pressures typically broken out as follows:
- 256 +/- 15 PSID Barometric Ref
- 224 +/- 45 PSID Barometric Ref
- 32 each of +/-5, +/- 100 and +500 PSIF Barometric Ref
- 736 Escort channels of which 588 are available for the test article
- 480 temperatures from CA type thermocouples
- 24 temperatures from type T
- 24 temperatures from type R
- Off-site access to data
- Transient
Data Acquisition
The transient data system provides multi-channel high speed digitized acquisition of rapidly changing cyclic on non-periodic impulse type events. The system consists of:
- A front end of Pacific filter/amplifiers with Butterworth anti aliasing filters (36 dB oct)
- A near real time display capabilty
- Off loading the data by FTPing, in near real time, to either our computer or yours for post processing
- 256 16 Bit A/D per channels (sample and hold per channel)
- Throughput of 1 million samples per second
Other
Features
- Gas
Analysis, Infrared Imaging, and Schlieren for Freejet Installations
can be made available.
- Stringent
Security Requirements
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