Keyword: Knock

Briefs: Propulsion
Method for Establishing Cool Flames and Flameless Fuel Oxidation with Zero Emissions Using Non-Equilibrium Plasma Activation

Current engines and combustors run at high temperature, which leads to problems of engine knocking, soot and NOx emissions, and difficulty in combustion control. On the other hand, low-temperature combustion and fuel...

Briefs: Test & Measurement

The foodborne pathogen Escherichia coli O157 causes an estimated 73,000 illnesses and 60 deaths every year in the United States. Better safety tests could help avoid some of the illnesses...

NASA Spinoff: Robotics, Automation & Control

On the Curiosity rover, a tool called CheMin (Chemistry and Mineralogy) is helping scientists determine what minerals make up the Martian landscape, and whether single-celled or more...

Briefs: Imaging
Stereoscopic Planar Laser-Induced Fluorescence Imaging for Time-Resolved 3D Movies in Hypersonic Flow

Understanding and predicting transition from laminar to turbulent flow in hypersonic boundary layers is an active and important field of research because transitional and turbulent heating can be four or more times higher than laminar heating on...

Briefs: Propulsion
Micropulse Detonation Rocket Engine for Nano-Satellite Propulsion

An efficient propulsion system would use a micropulse detonation rocket engine (–PDRE) for nano-satellite maneuverability in space. Technical objectives are to design, build, and conduct a small detonation tube experiment in order to explore the feasibility of using –PDRE for...

Briefs: Lighting

If you want to create a moving light source, you have a few possibilities. One is to mount a light emitter in some kind of mechanical housing — the approach used in, for example, theatrical spotlights, which...

Briefs: Physical Sciences
Detection of Chemical Precursors of Explosives

Certain selected chemicals associated with terrorist activities are too unstable to be prepared in final form. These chemicals are often prepared as precursor components, to be combined at a time immediately preceding the detonation. One example is a liquid explosive, which usually requires an...

Articles: Photonics/Optics

The ability to record simultaneous framing images and streak images has long been a requirement in the research fields of detonation, electrical discharge, biomedical and many other...

Briefs: Physical Sciences

Scintillation-based fast-neutron detectors that are smaller and less power-hungry than mainstream scintillation-based fast-neutron detectors are undergoing development. There are...

Briefs: Motion Control

An improved type of exhaust nozzle has been invented to help optimize the performances of multitube detonative combustion engines. The invention is applicable to both air-breathing...

Briefs: Mechanical & Fluid Systems

A leak-free valve has been proposed as a more reliable, less expensive, adaptable alternative to a one-time-opening, pyrotechnically actuated valve (pyrovalve). In the original intended application, the pyrovalve...

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Application Briefs: Mechanical & Fluid Systems

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NASA Spinoff: Mechanical & Fluid Systems

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Briefs: Mechanical & Fluid Systems

Tool for Inspecting Alignment of Twinaxial Connectors

Articles: Data Acquisition

Multifunctional, Integrated, Photonic Lab-on-a-Chip for Astronaut Health...

Q&A: Green Design & Manufacturing

Q&A: Plastics Could See Second Life as Biodegradable Surfactants

Podcasts: Data Acquisition

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