Research & Technology 1999
Propulsion Systems Analysis
Noise-Reduction Benefits Analyzed for Over-the-Wing-Mounted Advanced Turbofan Engines
Integrated Supportability Analysis and Cost System Enhanced
Materials
Very Long Term Oxidation of Titanium Aluminides Investigated
Directionally Solidified NiAl-Based Alloys Studied for Improved Elevated-Temperature Strength and Room-Temperature Fracture Toughness
Creep Properties of NiAl-1Hf Single Crystals Re-Investigated
Constituent-Based Life Models Being Developed for SiC/SiC Composites
Silicon Nitride Rocket Thrusters Test Fired Successfully
Directionally Solidified Ceramics Produced
Electric Plasma Arc-Lamp Combustor Liner Durability Test System Developed
Affordable, Robust Ceramic Joining Technology (ARCJoinT) Given 1999 R&D 100 Award
Atomistic Method Applied to Computational Modeling of Surface Alloys
System Being Developed to Measure the Rotordynamic Characteristics of Air Foil Bearings
Surface Coatings in Egyptian Art Characterized Through Spectroscopy
Shelf Life of PMR Polyimide Monomer Solutions and Prepregs Extended
Resin Transfer Moldable Polyimides Developed for High-Temperature Applications
Erosion Coatings for High-Temperature Polymer Composites: A Collaborative Project With Allison Advanced Development Company
Near-Net-Shape Processing of Sintered Fibrous Ceramics Achieved
Formation of Leading-Edge Pinholes in the Space Shuttle Wings Investigated
Diagnostic Techniques Used to Study Chemical-Vapor-Deposited Diamond Films
Turbine Airfoil With CMC Leading-Edge Concept Tested Under Simulated Gas Turbine Conditions
Thermal Conductivity Change Kinetics of Ceramic Thermal Barrier Coatings Determined by the Steady-State Laser Heat Flux Technique
Power and On-Board Propulsion Technology
SAVANT—Solar Array Verification and Analysis Tool Demonstrated
Chemical Fabrication Used to Produce Thin-Film Materials for High Power-to-Weight-Ratio Space Photovoltaic Arrays
High-Efficiency Multibandgap Solar Cell Being Developed
Prototype Lithium-Ion Battery Developed for Mars 2001 Lander
Nickel-Hydrogen Battery Cell Life Test Program Update for the International Space Station
4.5-kW Hall Effect Thruster Evaluated
Advanced Monopropellant Thruster Technology Tested
Ion Thruster Used to Propel the Deep Space 1 Spacecraft to Comet Encounters
High-Temperature Superconductive Cabling Investigated for Space Solar Power Satellites
Facility Designed and Built to Investigate the Combined Effects of Contaminant and Atomic Oxygen on a Light-Transmitting Surface
Large-Area Atomic Oxygen Facility Used to Clean Fire-Damaged Artwork
Insights Developed Into the Damage Mechanism of Teflon FEP Thermal Control Material on the Hubble Space Telescope
Contaminated Solar Array Handrail Samples Retrieved From Mir Analyzed
Steady-State Vacuum Ultraviolet Exposure Facility With Automated Lamp Calibration and Sample Positioning Fabricated
Environmental Exposure Conditions for Teflon FEP on the Hubble Space Telescope Investigated
Effects of Carbon Structure and Surface Oxygen on Carbon's Performance as the Anode in Lithium-Ion Battery Determined
Portable Infrared Reflectometer Designed and Manufactured for Evaluating Emittance in the Laboratory or in the Field
Electronics Demonstrated for Low-Temperature Operation
Automated Reflectance Measurement System Designed and Fabricated to Determine the Limits of Atomic Oxygen Treatment of Art Through Contrast Optimization
Automated Multiple-Sample Tray Manipulation Designed and Fabricated for Atomic Oxygen Facility
Adaptive Vibration Reduction System Shown to Effectively Eliminate Vibrations for the Stirling Radioisotope Power System
Instrumentation and Controls
Deep Etching Process Developed for the Fabrication of Silicon Carbide Microsystems
Packaging Technology Developed for High-Temperature SiC Sensors and Electronics
Hydrogen Sensors Demonstrated on the Shuttle
Temperature Distribution Within a Defect-Free Silicon Carbide Diode Predicted by a Computational Model
Temperature Correction of Pressure-Sensitive Paints Simplified
Surge Flow in a Centrifugal Compressor Measured by Digital Particle Image Velocimetry
Engine-Scale Combustor Rig Designed, Fabricated, and Tested for Combustion Instability Control Research
Aerospike Engine Post-Test Diagnostic System Delivered to Rocketdyne
Communications Technology
Internet Protocol Suite Enhanced for Satellite-Based Networks
Three-Dimensional Electron Optics Model Developed for Traveling-Wave Tubes
Modular Low-Heater-Power Cathode/Electron Gun Assembly for Microwave and
Millimeter Wave Traveling Wave Tubes
Digital Channel Simulator Developed and Tested
ACTS High-Speed VSAT Demonstrated
Turbomachinery and Propulsion Systems
Accuracy of Numerical Simulations of Tip Clearance Flow in Transonic Compressor Rotors Improved Dramatically
Wave Rotor Technology Tested Successfully
Turbine Blade and Endwall Heat Transfer Measured in NASA Glenn's Transonic Turbine Blade Cascade
Solid Hydrogen Formed for Atomic Propellants
Atomic Rocket Vehicle Performance Improved
Extensive Testing Conducted for the Advanced Subsonics Technology Regional Engine Combustor Program
Ice Accretions on Modern Airfoils Investigated
Interactive Software System Developed to Study How Icing Affects Airfoil Performance (Phase 1 Results)
Supercooled Large Droplet Icing Flight Research Program
Software Released by LEWICE 2.0 Ice Accretion Software Development Project
Mt. Washington Icing Sensors Project (MWISP) Tests Technologies for Remote Sensing of Icing Conditions
Aircraft Icing Educational and Training Videos Produced for Pilots
Inlet Unstart Propulsion Integration Wind Tunnel Test Program Completed for High-Speed Civil Transport
CFD Software for Aerospace Applications Available From the NPARC Alliance
Screech Noise Generation From Supersonic Underexpanded Jets Investigated
Propellant Densification Ground Testing Conducted for Launch Vehicles
DRAGON Grid: A Three-Dimensional Hybrid Grid Generation Code Developed
Structures and Acoustics
Thermoelastic Stress Analysis: An NDE Tool for the Residual Stress Assessment of Metallic Alloys
Composite Flywheels Assessed Analytically by NDE and FEA
Time-Dependent Reversible-Irreversible Deformation Threshold Determined Explicitly by Experimental Technique
Benchmark Testing of the Largest Titanium Aluminide Sheet Subelement Conducted
Titanium Aluminide Technologies Successfully Transferred From HSR Program to RLV VentureStar Program
Test Standard Developed for Determining the Life Prediction Parameters of Advanced Structural Ceramics at Elevated Temperatures
Nonlinearity and Strain-Rate Dependence in the Deformation Response of Polymer Matrix Composites Modeled
Strain Measurement System Developed for Biaxially Loaded Cruciform Specimens
Damage Resistance of Titanium Aluminide Evaluated
CEMCAN Software Enhanced for Predicting the Properties of Woven Ceramic Matrix Composites
GENOA-PFA: Progressive Fracture in Composites Simulated Computationally
New Technology--Large-Area Three-Dimensional Surface Profiling Using Only Focused Air-Coupled Ultrasound--Given 1999 R&D 100 Award
Propulsion Aeroelastic Analysis Developed for Flutter and Forced Response
Optical Measurements of Axial and Tangential Steady-State Blade Deflections Obtained Simultaneously
Structural Simulations of Engine-Airframe Systems Being Improved
Curved Thermopiezoelectric Shell Structures Modeled by Finite Element Analysis
Novel Vibration Damping of Ceramic Matrix Composite Turbine Blades Developed for RLV Applications
Cascade Optimization Strategy With Neural Network and Regression Approximations Demonstrated on a Preliminary Aircraft Engine Design
Effects of Various Heat Treatments on the Ballistic Impact Properties of Inconel 718 Investigated
Failure Accommodation Tested in Magnetic Suspension Systems for Rotating Machinery
Acoustics and Thrust of Separate Flow Exhaust Nozzles With Mixing Devices Investigated for High Bypass Ratio Engines
New High-Temperature Turbine Seal Rig Fabricated
Experimental and Analytical Determinations of Spiral Bevel Gear-Tooth Bending Stress Compared
Gear Durability Shown To Be Improved by Superfinishing
Pressure-Balanced, Low-Hysteresis Finger Seal Developed and Tested
Thermal Barriers Developed for Solid Rocket Motor Nozzle Joints
Space Communications
Seven Years of ACTS Technology Verification Experiments Reviewed
Advanced Communications Technology Satellite (ACTS) Used for Inclined Orbit Operations
Satellite Broadcast of Graphical Weather Data Flight Tested
Proposal Drafted for Allocating Space-to-Space Frequencies in the GPS Spectrum Bands
Low-Cost Tracking Ground Terminal Designed To Use Cryogenically Cooled Electronics
Feasibility Activities Completed for the Direct Data Distribution (D3) Experiment
Antennas Designed for Advanced Communications for the Air Traffic Management (AC/ATM) Project
Microgravity Science
Burning Plastics Investigated in Space for Unique U.S./Russian Cooperative Project
Novel High Gas-Temperature Calibration System Demonstrated
Flame Design—A Novel Approach Developed to Produce Clean, Efficient
Diffusion Flames
Cool Flames and Autoignition: Thermal-Ignition Theory of Combustion Experimentally Validated in Microgravity
Fiber-Optic Imaging Probe Developed for Space Used to Detect Diabetes Through the Eye
Nucleate Boiling Heat Transfer Studied Under Reduced-Gravity Conditions
Boiling on Microconfigured Composite Surfaces Enhanced
Bubbly Suspension Generated in Low Gravity
Growth and Morphology of Supercritical Fluids Studied in Microgravity on Mir
Density Relaxation of Liquid-Vapor Critical Fluids Examined in Earth's Gravity
Diffusing Wave Spectroscopy Used to Study Foams
Concept Defined for the International Space Station's Fluids and Combustion Facility
Hubble Space Telescope Program on STS-95 Supported by Space Acceleration Measurement System for Free Flyers
Physics of Hard Spheres Experiment: Significant and Quantitative Findings Made
Colloidal Gelation-2 and Colloidal Disorder-Order Transition-2 Investigations Conducted on STS-95
Power and Propulsion
Power System Options Evaluated for the Radiation and Technology Demonstration Mission
Solar Power System Evaluated for the Human Exploration of Mars
Power Systems Evaluated for Solar Electric Propulsion Vehicles
Engineering and Technical Services
Facilities and Test Engineering
New Compressor Added to Glenn's 450-psig Combustion Air System
Two-Dimensional Bifurcated Inlet Variable Cowl Lip Test Completed in 10- by 10-Foot Supersonic Wind Tunnel
Reflective Focused Schlieren System Improved for Use in 10- by 10-Foot Supersonic Wind Tunnel
Engineering Design and Analysis
Ultrasonic Waves in Water Visualized With Schlieren Imaging
Mars Spark Source Prototype Developed
Reduced-Noise Gas Flow Design Guide Developed as a Noise-Control Design Tool for Meeting Glenn's Hearing Conservation and Community Noise Goals
New Web Server—the Java Version of Tempest—Produced
Appendixes
Definitions of NASA Headquarters Program Offices
Definitions of Programs and Projects
Index of Authors and Contacts
Last updated May 25, 2000, by Nancy.L.Obryan@nasa.gov
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