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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 to 165 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 an Alpha microprocessor to provide:
- An X window based display
- Real time acquisition and display of engineering unit converted data, as well as the resultant calculations
- Computed performance calculations, which can be displayed in a variety of tabular and graphical formats
- Custom tabular display pages
- Scrolling plots
- X-Y plots
- Bargraph plots
- Contour plots
- Growing plots
- Selectable limit checking with inverse video and alarming
- 1 second update rate
- Custom, application-specific features are available upon request
Salient characteristics specific to the PSL data acquisition system are:
- Analog data acquisition with the following accuracies:
- Neff 400 is +/- 0.05% of range (480 channels)
- Neff 600 is +/- 0.02% of range + 2µv (256 channels)
- 736 Escort channels of which 588 are available for the test article
- 432 thermocouples, type K
- 48 thermocouples, configurable for type K, T or R
- Off-site access to data
- Other configurations and system expansion are available upon request
Escort pressure data is acquired through digitally temperature compensated electronically scanned pressure scanners; known as NetScanners. The system consists of 16 port, rack mounted scanners with ranges from +/-15 PSID to +750 PSID, located outside the test chamber. Digital temperature compensation allows for long periods of time between calibrations while maintaining the overall system accuracy of +/-0.05% of range. Improved productivity is achieved since calibrations are not required during the test period.
- Typically 448 ports of Netscanner pressures as follows:
- 128 +/- 15 PSID Barometric Ref
- 128 +/- 45 PSID Barometric Ref
- 128 +/- 100 PSID Barometric Ref
- 64 +500 PSID Barometric Ref
- Other configurations and system expansion to 576 pressures are available upon request
- Transient Data Acquisition
The Dewetron transient data system provides multi-channel high speed digitized acquisition of rapidly changing cyclic or non-periodic impulse type events. The system consists of:
- 126 channels with 24 bit sigma-delta A/Ds per channel
- Data rates from 1,000 to 200,000 samples/ second
- Real time displays
- Tabular (Actual, Average, AC RMS, Pk-Pk, Min, Max )
- Scope
- FFT, PSD
- Strip Chart
- Others
- Near real-time data transfer to customers in standard or custom formats
- Multiple, independent display capability
- Derived "math" channels can be calculated, displayed and stored along with analog data
- The DeweSoft software can be loaded onto a customer's Windows machine at no cost to be utilized for quick data analysis
- Other Features
- Gas Analysis, Infrared Imaging, and Schlieren for Freejet Installations can be made available
- Stringent Security Requirements
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