Propulsion Systems Laboratory National Aeronautics and Space Administration Propulsion Systems Laboratory NASA PSL is one of the Nation’s Premier Direct.

Propulsion Systems Laboratory National Aeronautics and Space Administration

Propulsion Systems Laboratory

NASA PSL is one of the Nation’s Premier Direct Connect Altitude Simulation Facilities for Full-Scale Gas Turbine Engine and Propulsion System Research

National Research Facility Commercial Development National Defense Initiatives Unique Applications

• Continuous Flow at Full Flight Envelope up to Mach 4, 90,000 ft (-90 F)

• Real Time High Speed Data Acquisition and Custom Displays

• Six Component Thrust System (50K lbf)

• Engine Operability and Stall Resistance

• High Altitude Performance

• General Aviation and Business Jets

• Military Fighter Engine Development

• Helicopter Turbo-shaft Engines

• UAV/APU/Missile Engines

• Engine Icing Research―ice crystal and conventional icing

Williams FJ-33

Capabilities/Applications

Propulsion Systems Laboratory National Aeronautics and Space Administration

Aviation Safety Issue – Studies conclude there are over 140 loss of thrust control incidents thought to be a result of operating in a high altitude ice crystal environment.

NASA Aeronautics Test and Aviation Safety Programs invested in engine icing research at NASA Glenn’s Propulsion Systems Laboratory

Propulsion Systems Laboratory Jet Engine Icing Enhancement

National Research Facility Commercial Development National Defense Initiatives Unique Applications

Williams FJ-33

Improve Aviation Safety Establish the worlds first and only altitude, ice crystal icing engine test

facility Perform fundamental engine icing research to support engine

development and help meet newly established engine certification requirements

Develop NPSS engine ice crystal icing risk computer codes Develop conventional and mixed phase engine icing test capabilities Collaborate with industry and other government agencies

Spray Nozzles

OBJECTIVES

CIP – Cloud Imaging Probe

measures particle size

Ice Crystal SystemCapabilities

Min Max

Altitude 4k 40K

Total Temp F

-60 50

Mach # 0.15 0.80

IWC(g/m3)Ice water content

Cloud Density

0.5 9.0

MWD (µ)(medium vol.

dia)

15 80

Run Time Continuous

Propulsion Systems Laboratory National Aeronautics and Space Administration

PSL Engine Icing – Test Cell HardwareHoneywell ALF502-R5 Inaugural Engine Icing Test 2013

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Honeywell ALF 502 installed in PSL3

Transition instrumentation &

Camera Duct

Engine Thrust Stand

Flex/Labyrinth Seal

Propulsion Systems Laboratory National Aeronautics and Space Administration

PSL Engine Icing – Test Cell HardwareIcing Calibration - Instrumentation

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Propulsion Systems Laboratory National Aeronautics and Space Administration

PSL Engine Icing – Capabilities

Four different cloud types to consider in the engine icing arena

• Ice Crystals (ICI) new regulation defined in 14 CFR33 Appendix D• Conventional Icing (super-cooled liquid water droplets) (LWC)  defined

by 14CFR25 Appendix C• Mixed phased conditions combining both super cooled liquid water

droplets and ice crystals• Super cooled large diameter liquid water droplets (SLD) new regulation

defined in 14CFR25 Appendix O

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The interest from NASA research is the ice accretion, ice shed and ice ingestion into the high pressure compressor of any type of ice building up on the engine induction and

compression systems

National Aeronautics and Space Administration

Altitude 1

Ice Crystal Icing Engine Testing in the NASA Glenn Research Center’s Propulsion Systems Laboratory (PSL): Altitude Investigation 6

X

Cloud on Cloud off

Uncommanded Load Reduction

Uncommanded N1 Reduction

Static Pressure Reduction

Propulsion Systems Laboratory National Aeronautics and Space Administration

PSL Engine Icing

Testing to Date:

1. Successful inaugural engine icing test (Honeywell ALF502-R5) completed March 2013.– Calibrated and produced known ice crystal conditions in PSL and duplicated a full engine

rollback experienced during flight testing on this engine– Generated valuable data used to develop NASA engine icing risk computational tools– Proved out PSL as a viable engine icing R&D test facility

2. Successful second engine icing test (Proprietary Driven Rig) completed March 2015– Altitude sweeps and various icing cloud conditions– Utilized 20+ internal video camera techniques and specialty non-intrusive instrumentation to

document ice accretion and ingestion– Developed ice shedding collection methods– Proved out PSL as a viable large turbofan engine test facility.

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Propulsion Systems Laboratory National Aeronautics and Space Administration

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