Research and Technology, 1998This report selectively summarizes the NASA Lewis Research Center's research and technology accomplishments for the fiscal year 1998. It comprises 134 short articles submitted by the staff scientists and engineers. The report is organized into five major sections: Aeronautics, Research and Technology, Space, Engineering and Technical Services, and Commercial Technology. A table of contents and an author index have been developed to assist readers in finding articles of special interest. This report is not intended to he a comprehensive summary of all the research and technology work done over the past fiscal year. Most of the work is reported in Lewis-published technical reports, journal articles, and presentations prepared by Lewis staff and contractors. In addition, university grants have enabled faculty members and graduate students to engage in sponsored research that is reported at technical meetings or in journal articles. For each article in this report, a Lewis contact person has been identified, and where possible, reference documents are listed so that additional information can be easily obtained. The diversity of topics attests to the breadth of research and technology being pursued and to the skill mix of the staff that makes it possible. At the time of publication, NASA Lewis was undergoing a name change to the NASA John H. Glenn Research Center at Lewis Field.
IDRelationTitle20050192116WorkMetrology Evaluation of Superfinished Gears Completed20050187090WorkPower System Optimization Codes Modified20050187011WorkMonte Carlo Simulation of Alloy Design Techniques: Fracture and Welding Studied Using the BFS Method for Alloys20050192142WorkLaser Light Scattering with Multiple Scattering Suppression Used to Measure Particle Sizes20050192153WorkThermomechanical Fatigue Durability of T650-35/PMR-15 Sheet-Molding Compound Evaluated20050192146WorkDeformation Behaviors of HIPped Foil Compared with Those of Sheet Titanium Alloys20050188472WorkTeflon FEP Analyzed After Retrieval From the Hubble Space Telescope20050188480WorkParallel Stirling Converters Being Developed for Spacecraft Onboard Power20050182009WorkNeural Network and Regression Approximations Used in Aircraft Design20050187095WorkThermal Control Replacement Materials Evaluated for Durability and Selected for the Hubble Space Telescope20050192094WorkMicroelectrical Mechanical Systems Flow Control Used to Manage Engine Face Distortion in Compact Inlet Systems20050188550WorkWIND Flow Solver Released20050192137WorkCrystal Growth Using MEPHISTO20050192136WorkEffects of g-Jitter on Diffusion in Binary Liquids20050192124WorkStability of Enclosed Laminar Flames Studied in Microgravity20050187015WorkLiquid Bipropellant Microrocket Concept Under Development20050187020WorkSingle-Crystal NiAl-X Alloys Tested for Hot Corrosion20050188499WorkNondestructive Strain Measurement System Used to Determine Surface Strain on Fibers20050188518WorkNational Transportation Safety Board Aircraft Accident Investigation Supported20050188548WorkBroadband Satellite Technologies and Markets Assessed20050194724WorkThird and Final Shuttle Mission of the Isothermal Dendritic Growth Experiment Conducted: Highest Supercooling Ever Recorded Achieved20050188524WorkCombustion Instabilities Modeled20050194727WorkSilicon Carbide Being Developed for High-Definition Television (HDTV) Transmitter Modules20050188496WorkScanning Mode Shock Position Sensor Invented and Demonstrated20050188547WorkStability of the Tilt Modes of an Actively Controlled Flywheel Analyzed20050182036WorkAffordable Manufacturing Technologies Being Developed for Actively Cooled Ceramic Components20050192150WorkSpace Acceleration Measurement System for Free Flyers20050192102Work"Ultra"-Fast Fracture Strength of Advanced Structural Ceramic Materials Studied at Elevated Temperatures20050188530WorkThree-Dimensional Gear Crack Propagation Studied20050182035WorkDeleterious Phase Formation in Next- Generation Nickel-Base Superalloys Predicted20050192129WorkUnlocking the Keys to Vortex/Flame Interactions in Turbulent Gas-Jet Diffusion Flames--Dynamic Behavior Explored on the Space Shuttle20050188450WorkChanges in the Optical Properties of Materials Are Observed After 18 Months in Low Earth Orbit20050188485WorkEffects Investigated of Ambient High-Temperature Exposure on Alumina-Titania High-Emittance Surfaces for Solar Dynamic Systems20050188510WorkInnovative, Inexpensive Etching Technique Developed for Polymer Electro- Optical Structures20050188449WorkSynchrotron Vacuum Ultraviolet Light and Soft X-Ray Radiation Effects on Aluminized Teflon FEP Investigated20050188516WorkX-33 Combustion-Wave Ignition System Tested20050188513WorkBandwidth Efficient Wireless Digital Modem Developed20050188500WorkAtomic Oxygen Lamp Cleaning Facility Fabricated and Tested20050188544WorkNovel Method Used to Inspect Curved and Tubular Structural Materials20050192118WorkAdvanced Communications Technology Satellite Now Operating in an Inclined Orbit20050188509WorkConformal, Transparent Printed Antenna Developed for Communication and Navigation Systems20050187021WorkLightweight Battery Charge Regulator Used to Track Solar Array Peak Power20050187014WorkHigh-Performance Bipropellant Engine20050188495WorkAcoustic Pyrometry Applied to Gas Turbines and Jet Engines20050187004WorkSensor Lead Wires Positioned on SiC-based Monolithic Ceramic and Fiber- reinforced Ceramic Matrix Composite Subcomponents with Flat and Curved Surfaces20050188487WorkDiamond Analyzed by Secondary Electron Emission Spectroscopy20050187019Work10 000-hr Cyclic Oxidation Behavior of 68 High-Temperature Co-, Fe-, and Ni- Base Alloys Evaluated at 982 deg. C (1800 deg. F)20050187012WorkLithium-Ion Polymer Rechargeable Battery Developed for Aerospace and Military Applications20050188511WorkHigh-Performance, Low-Complexity Codes Researched for Communication Channels20050194719WorkTracker: Image-Processing and Object-Tracking System Developed20050189199WorkRapid Chill and Fill of a Liquid Hydrogen Tank Demonstrated20050188527WorkInternet Protocol Enhanced over Satellite Networks20050188528WorkSatellite ATM Networks: Architectures and Guidelines Developed20050187023WorkPolymers Erosion and Contamination Experiment Being Developed20050188526WorkAdvances Made in the Next Generation of Satellite Networks20050194723WorkPyroshock Environments Characterized for Spacecraft Missions20050188512WorkReconfigurable Data Communications Packet-Switch Emulation Test Bed Demonstrated20050195827WorkNASA Has Joined America True's Design Mission for 200020050192122WorkSolid Surface Combustion Experiment Yields Significant Observations20050195826WorkVirtual Interactive Classroom: A New Technology for Distance Learning Developed20050192103WorkTime-Shifted Boundary Conditions Used for Navier-Stokes Aeroelastic Solver20050187009WorkNew Vapor/Mist Phase Lubricant Formulated20050187091WorkRetrieval of Mir Solar Array20050187022WorkInternational Low-Earth-Orbit Spacecraft Materials Test Program Initiated for Better Prediction of Durability and Performance20050187016WorkLow-Cost, High Glass-Transition Temperature, Thermosetting Polyimide Developed20050188507WorkLeRC-HT: NASA Lewis Research Center General Multiblock Navier-Stokes Heat Transfer Code Developed20050187005WorkModal Acoustic Emission Used at Elevated Temperatures to Detect Damage and Failure Location in Ceramic Matrix Composites20050188517WorkUse of Atomic Fuels for Rocket-Powered Launch Vehicles Analyzed20050192115WorkLow-Noise Potential of Advanced Fan Stage Stator Vane Designs Verified in NASA Lewis Wind Tunnel Test20050188515WorkSilicon-Germanium Fast Packet Switch Developed for Communications Satellites20050187018WorkAdvanced Refrigerator/Freezer Technology Development Project20050192149WorkOnset of Convection Due to Surface Tension Variations in Multicomponent and Binary Fluid Layers20050192125WorkViscosity of Xenon Examined in Microgravity20050182013WorkNumerical System Solver Developed for the National Cycle Program20050188549WorkTwo-Dimensional Bifurcated Inlet/Engine Tests Completed in 10- by 10-Foot Supersonic Wind Tunnel20050192130WorkPhase-Shifted Laser Feedback Interferometry20050188539WorkViscoplastic Constitutive Theory Demonstrated for Monolithic Ceramic Materials20050188543WorkCARES/Life Ceramics Durability Evaluation Software Enhanced for Cyclic Fatigue20050194720WorkCoarsening in Solid-Liquid Mixtures Studied on the Space Shuttle20050186914WorkNovel Ultraviolet-Light-Curable Polyimides20050188504WorkOptical Flow-Field Techniques Used for Measurements in High-Speed Centrifugal Compressors20050192123WorkDARTFire Sees Microgravity Fires in a New Light--Large Data Base of Images Obtained20050187007WorkHigh-Temperature Solid Lubricants Developed by NASA Lewis Offer Virtually "Unlimited Life" for Oil-Free Turbomachinery20050192098WorkNondestructive Evaluation Correlated with Finite Element Analysis20050188546WorkFlutter Version of Propulsion Aeroelasticity Code Completed20050188522WorkHigh Reliability Engine Control Demonstrated for Aircraft Engines20050188506WorkK-Band Phased Array Developed for Low- Earth-Orbit Satellite Communications20050187010WorkSpace Plasma Shown to Make Satellite Solar Arrays Fail20050188498WorkNeural Networks Used to Compare Designed and Measured Time-Average Patterns20050182034WorkMoSi2-Base Structural Composite Passed Engine Test20050189198WorkResults of Liquid Motion Experiment Analyzed20050188503WorkCassini Radio Science Experiments on Saturn and Titan Preserved Because of Lewis Analysis20050187024WorkHighly Conducting Graphite Epoxy Composite Demonstrated20050188519WorkThin-Film Ferroelectric Tunable Microwave Devices Being Developed20050189201WorkSpace-Time Conservation Element and Solution Element Method Being Developed20050188523WorkDistortion Tolerant Control Flight Demonstration Shown to Be Successful20050188541WorkMultidisciplinary Probabilistic Heat Transfer/Structural Analysis Code Developed: NESTEM20050188501WorkTechnique Developed for Optimizing Traveling-Wave Tubes20050188525WorkWeb Transfer Over Satellites Being Improved20050188540WorkResistance of Titanium Aluminide to Domestic Object Damage Assessed20050187013WorkCathodes Delivered for Space Station Plasma Contactor System20050188497WorkPressure-Sensitive Paint Applied to Ice Accretions20050194721WorkNASA Lewis Launch Collision Probability Model Developed and Analyzed20050188508WorkResearch Data Acquired in World-Class, 60-atm Subsonic Combustion Rig20050188521WorkInflatable Solar Thermal Concentrator Delivered20050188514Work622-Mbps Orthogonal Frequency Division Multiplexing Modulator Developed20050182023WorkFoilSim: Basic Aerodynamics Software Created20050188502WorkMultistage Turbomachinery Flows Simulated Numerically20050188542WorkDesign Tool Developed for Probabilistic Modeling of Ceramic Matrix Composite Strength20050182031WorkInlet-Compressor Analysis Performed Using Coupled Computational Fluid Dynamics Codes20050188494WorkAngular Distribution of Elastically Scattered Electrons Determined and Its Effect on Collector Performance Computed20050192117WorkNASA Lewis Thermal Barrier Feasibility Investigated for Use in Space Shuttle Solid-Rocket Motor Nozzle-to-Case Joints20050192138WorkMicrogravity Experiments Being Developed for Microscopic Study of Colloidal Spheres20050189200WorkZero Boiloff Storage of Cryogenic Propellants Achieved at Lewis' Supplemental Multilayer Insulation Research Facility20050187008WorkSolar Array Verification Analysis Tool (SAVANT) Developed20050182033WorkFlow of GE90 Turbofan Engine Simulated20050187017WorkIon Thruster and Power Processor Developed for the Deep Space 1 Mission20050188451WorkLow-Temperature Electronic Components Being Developed20050187006WorkThermal Mechanical Stability of Single-Crystal-Oxide Refractive Concentrators Evaluated for High-Temperature Solar-Thermal Propulsion20050188545WorkComposite Nozzle/Thrust Chambers Analyzed for Low-Cost Boosters20050188505WorkNovel Low-Cost, Low-Power Miniature Thermionic Cathode Developed for Microwave/Millimeter Wave Tube and Cathode Ray Tube Applications20050188493WorkFinite Ground Coplanar (FGC) Waveguide: Characteristics and Advantages Evaluated for Radiofrequency and Wireless Communication Circuits20050182032WorkCommon Analysis Tool Being Developed for Aeropropulsion: The National Cycle Program Within the Numerical Propulsion System Simulation Environment20050194726WorkTraversing Microphone Track Installed in NASA Lewis' Aero-Acoustic Propulsion Laboratory Dome20050188486WorkA More Accurate and Efficient Technique Developed for Using Computational Methods to Obtain Helical Traveling-Wave Tube Interaction Impedance20050194716WorkBinary Colloidal Alloy Test Conducted on Mir20050194722WorkCustomized Hermetic Feedthrough Developed to Isolate Fluids20050188529WorkDual-Laser Probe for Measuring Blade-Tip Clearance Tested20050192114WorkNASA Space Mechanisms Handbook: Lessons Learned Documented20050195828WorkNational Combustion Code, a Multidisciplinary Combustor Design System, Will Be Transferred to the Commercial Sector