Keyword: Jet engines

Briefs: Manufacturing & Prototyping
Method for Insertion of Carbon Fiber Through the Thickness of Dense Dry Fiber Preform

Creation of a structural joint for a heat shield for extreme entry environments requires structural fibers penetrating through the thickness of the shield at joint locations. The structural fibers must be made of carbon to withstand extremely high temperatures,...

Briefs: Imaging

Taking measurements in a scramjet engine is particularly challenging because of the harsh testing environment. Any probe inserted in the flow would generate shock waves, strongly...

Briefs: Information Technology
Tool for Turbine Engine Closed-loop Transient Analysis (TTECTrA)

The current steady-state performance-based system studies are not adequate to evaluate certain advanced technologies for the challenges associated with meeting the transient performance requirements without better definition and control of component operating margins. Additional...

Briefs: Manufacturing & Prototyping
Passive Destructive Interference Acoustic Liner for a Turbofan Engine Using Additive Manufacturing

This technology exploits the capabilities of additive manufacturing to attenuate the fan noise within the inlet or aft duct of a turbofan engine. The approach may be expanded to include auxiliary power units, environmental control systems, or other...

Briefs: Test & Measurement
Dual-Cavity Rayleigh Scattering Measurement System

Molecular-based optical diagnostics techniques capable of obtaining simultaneous measurements of multiple fluid properties are critically important for characterizing hypersonic air-breathing engines, such as scramjet engines and scramjet-rocket combined cycle engines. Correlations between those...

Who's Who: Robotics, Automation & Control

A geologist by training, Carolyn Parcheta had an idea in July of 2013 to develop a robot that explores and measures the shape of volcanic fissures. She...

Articles: Aerospace

Streamlined aircraft bodies, quieter jet engines, techniques for preventing icing, drag-reducing winglets, lightweight composite structures, and so much more are an everyday part of flying...

Who's Who: Design

Brian Trease, JPL Mechanical Engineer, uses origami principles to design large-scale and small-scaled deployable structures. In 2013, Trease collaborated...

Briefs: Aerospace
Flap Side Edge Liners for Airframe Noise Reduction

One of the more critical constraints to the continued growth of air traffic is the related concern regarding aircraft noise. This concern has resulted in increasingly stringent noise restrictions for airports, both nationally and internationally. One of the major stretch goals for NASA is to...

Articles: Robotics, Automation & Control

Productivity and accuracy are important attributes in the competition for machine tools. Five-axis machining provides considerable potential for increasing productivity. In...

Briefs: Physical Sciences
Multi-Component, Multi-Point Interferometric Rayleigh/Mie Doppler Velocimeter

An interferometric Rayleigh scattering system was developed to enable the measurement of multiple, orthogonal velocity components at several points within very-high-speed or high-temperature flows. The velocity of a gaseous flow can be optically measured by sending...

Briefs: Physical Sciences
Energy-Based Tetrahedron Sensor for High-Temperature, High-Pressure Environments

An acoustic energy-based probe has been developed that incorporates multiple acoustic sensing elements in order to obtain the acoustic pressure and threedimensional acoustic particle velocity. With these quantities, the user can obtain various energy-based...

Briefs: Physical Sciences
Fiber Bragg Grating Sensor System for Monitoring Smart Composite Aerospace Structures

Lightweight, electromagnetic interference (EMI) immune, fiber-optic, sensorbased structural health monitoring (SHM) will play an increasing role in aerospace structures ranging from aircraft wings to jet engine vanes. Fiber Bragg Grating (FBG) sensors for SHM...

Who's Who: Aerospace

William Allen, senior engineer at the Jet Propulsion Laboratory, is the mechanical systems design lead on the Mars Science...

Briefs: Software
Commercial Modular Aero-Propulsion System Simulation 40k

The Commercial Modular Aero-Propulsion System Simulation 40k (C-MAPSS40k) software package is a nonlinear dynamic simulation of a 40,000-pound (≈178-kN) thrust class commercial turbofan engine, written in the MAT-LAB/Simulink environment. The model has been tuned to capture the behavior...

Application Briefs: Sensors/Data Acquisition
Pressure sensor
Sporian® Microsystems
Lafayette, CO
303-516-9116
www.sporian.com

Sporian Microsystems has been awarded a NASA contract to develop a...

Briefs: Mechanical & Fluid Systems
Dampers for Stationary Labyrinth Seals

Vibration dampers have been invented that are incorporated as components within the stationary labyrinth seal assembly. These dampers are intended to supplement other vibration-suppressing features of labyrinth seals in order to reduce the incidence of high-cycle-fatigue failures, which have been known to...

Articles: Aerospace

Aircraft of the future may not look significantly different from today’s aircraft, but a peek “under the hood” will reveal technologies that are vastly different. Commercial aviation giants...

Briefs: Mechanical & Fluid Systems
Wireless Inductive Power Device Suppresses Blade Vibrations

Vibration in turbomachinery can cause blade failures and leads to the use of heavier, thicker blades that result in lower aerodynamic efficiency and increased noise. Metal and/or composite fatigue in the blades of jet engines has resulted in blade destruction and loss of lives....

Articles: Electronics & Computers

Historically, processors from the PowerPC® family, now known as Power Architecture® processors, have been the dominant choice for implementing Digital...

Briefs: Mechanical & Fluid Systems
Acoustic Liner for Turbomachinery Applications

The purpose of this innovation is to reduce aircraft noise in the communities surrounding airports by significantly attenuating the noise generated by the turbomachinery, and enhancing safety by providing a containment barrier for a blade failure. Acoustic liners are used in today’s turbofan...

Briefs: Manufacturing & Prototyping
Quick-Change Ceramic Flame Holder for High-Output Torches

Researchers at NASA’s Langley Research Center have developed a new ceramic design flame holder with a service temperature of 4,000 °F (2,204 °C). The combination of high strength and high temperature capability, as well as a twist-lock mounting method to the steel burner, sets this...

Briefs: Information Technology
Extreme Programming: Maestro Style

“Extreme Programming: Maestro Style” is the name of a computer-programming methodology that has evolved as a custom version of a methodology, called “extreme programming” that has been practiced in the software industry since the late 1990s. The name of this version reflects its origin in the work of...

Briefs: Physical Sciences
Wide-Range Temperature Sensors With High-Level Pulse Train Output

Two types of temperature sensors have been developed for wide-range temperature applications. The two sensors measure temperature in the range of –190 to +200 °C and utilize a thin-film platinum RTD (resistance temperature detector) as the temperature-sensing element. Other...

Briefs: Semiconductors & ICs

Prototype logic gates made of n-channel junction field-effect transistors (JFETs) and epitaxial resistors have been demonstrated, with a view toward eventual implementation of...

Articles: Robotics, Automation & Control

For over a hundred years, machine parts composed of mechanical carbon have provided an alternative solution in applications where temperature and atmosphere conditions prevent the use of...

Briefs: Software

Increasing the temperature at which jet aircraft engines operate would significantly improve thrust and fuel efficiency with reduced emissions. However, current engines...

Briefs: Software
Simulating Operation of a Large Turbofan Engine

The Commercial Modular Aero- Propulsion System Simulation (CMAPSS) is a computer program for simulating transient operation of a commercial turbofan engine that can generate as much as 90,000 lb (≈0.4 MN) of thrust. It includes a power-management system that enables simulation of open- or...

Application Briefs: Sensors/Data Acquisition
Advanced Position Sensors to Aid NASA in Future Spaceflight
Silicon carbide-based position sensors
INPROX Technology Corp.
Boston, MA
617-573-5158
www.inproxtechnology.com

INPROX Technology Corp. (ITC) has entered into a Space Act Agreement (SAA) with NASA’s John H. Glenn Research Center in Ohio to develop advanced...