Stories
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Briefs: Energy
According to a proposal for small electric-power systems that must operate in cold environments, heat released in the operation of solar photovoltaic arrays with solar concentrators would be...
Briefs: Robotics, Automation & Control
Each member of the aircrew of an advanced fighter airplane wears a complex, multilayered ensemble that imposes a significant thermal burden by inhibiting normal transport of heat from the...
Briefs: Manufacturing & Prototyping
Two mounting schemes were devised for attaching heater wires to special-purpose glass tubing used in a capillary-heat-transfer experiment. Not only were the wires required to supply...
Briefs: Materials
A process that involves reaction bonding makes it possible to form strong joints, with tailorable thicknesses and compositions, between high-temperature-resistant structural parts...
Briefs: Electronics & Computers
Several microwave-cavity devices at various stages of development are designed for heating material samples or process streams with uniform temperature-versus-time histories. These devices...
Briefs: Power
A prototype Stirling-engine regenerator containing a matrix made of carbon-fiber-based composite materials has been developed. The concept underlying this development effort is one of...
Briefs: Photonics/Optics
Computer Code for Analysis of Stress in Silicon Wafers
The MacWafer™ code computes gravitational and thermal stresses in silicon wafers and uses these results to determine the maximum allowable temperature variation across a wafer, maximum processing temperatures, and maximum allowable heating and cooling rates. This information is of particular...
Briefs: Robotics, Automation & Control
Miniature, lightweight, low-power, low-vibration Joule-Thomson Rankine-Cycle refrigerators have been proposed for cooling portable scientific instruments. These refrigerators would be made...
Briefs: Software
Program Computes Equilibrium Compositions of Mixtures
The Chemical Equilibrium with Applications (CEA) computer program is used to obtain chemical-equilibrium compositions of complex mixtures. This program can be applied to a wide variety of problems in chemistry and chemical engineering. Specifically, CEA is applicable to the following kinds of...
Briefs: Mechanical & Fluid Systems
Program Facilitates Simulation of Flows of Cryogenic Fluids
EASY/ROCETS is a developmental computer program for mathematical modeling and analysis of dynamic flows of cryogenic fluids in a rocket-engine-testing facility. Heretofore, the numerical simulation of such flows has been accomplished by use of computer codes specific to test-equipment...
Briefs: Electronics & Computers
As electronic circuits become more densely packaged and higher in power, maintaining them within permissible temperature ranges becomes a major issue. This is especially true in the case of...
Briefs: Robotics, Automation & Control
Microscopic forced-flow heat-transfer systems containing heat exchangers, flow channels, electrostatically driven peristaltic pumps, and related components have been proposed. These...
Briefs: Mechanical & Fluid Systems
Pulse-tube Refrigerator Unit
Pulse-tube Refrigerators can be operated over a wide range of temperatures. These units can be used in numerous space and commercial refrigeration applications, including food refrigerator/freezers, laboratory freezers, and freeze dryers. Pulse-tube Refrigerators can also be used to cool detectors and electronic...
Briefs: Physical Sciences
A hybrid-grid scheme has been developed to afford a computationally efficient means for numerically solving equations of both (1) coupled flows of heat and mass in a fluid and (2)...
Briefs: Software
Program for Microanalysis of Composite Structures
Version 3.0 of the Boundary Element Solutions Technology Composite Modeling System (BESTCMS 3.0) is an advanced engineering software system for the microanalysis of fiber composite structures. BESTCMS is based on the BEST3D boundary-element program (COSMIC program LEW-15351). BESTCMS affords...
Briefs: Physical Sciences
A modification of design has been proposed to extend the longevity of cavity-type solar thermal receivers by improving the distribution of radiant solar flux in the cavities. A receiver...
Briefs: Physical Sciences
A heat exchanger made largely from pieces of single-crystal silicon has been designed for use as a recuperator in a reverse-Brayton-cycle cryocooler. Its design is optimized for transferring...
Briefs: Physical Sciences
A method that includes the use of modified equations of state has been developed to enable noniterative, efficient computation of the thermodynamic behaviors of gases and liquids at...
Briefs: Manufacturing & Prototyping
An improved process has been devised for making closed channels (e.g., coolant channels) in a heat-exchanger liner or a similar metal object. The process involves the following steps:...
Briefs: Physical Sciences
The figure illustrates an apparatus for measuring heat-transfer and pressure-drop characteristics of porous plug specimens in oscillating flows. The apparatus is built around an...
Briefs: Physical Sciences
Evaluation of Droplet-Evaporation Models for Gas/Liquid Flow
A report presents an evaluation of eight mathematical models of the evaporation of liquid droplets — models that are used in the numerical simulation of a variety of gas/liquid flows, including cooling sprays, burning liquid-fuel sprays, fire-suppression sprays, and air/fuel-premixing...
Briefs: Physical Sciences
Kinetic rate data are needed to design all chemical processes. Specifically, they are needed to determine such things as ignition delay times, combustion times, and explosion limits...
Top Stories
INSIDER: Software
Aya Durbin of Boston Dynamics on Why Humanoids Are the Future of...
INSIDER: Software
NVIDIA Announces Industry’s First Full-Stack Safety System for Physical...
Articles: RF & Microwave Electronics
Blog: Manned Systems
NASA Marches Toward Artemis III Mission in 2027
INSIDER: Electronics & Computers
This New Quantum Sensor Measures 3D Direction of RF Electromagnetic Fields
Quiz: Propulsion
Webcasts
Editorial Webinars: Motion Control
How Motors, Drives, and Sensors are Advancing Humanoid Robots
Webinars: AR/AI
From Grid to GPU: Validating Next-Gen AI Data Center Power...
Summits: Energy
Hydrogen & Alternative Fuels Summit 2026
Webinars: Automotive
Engineering Extended-Range Hybrid Systems
Editorial Webinars: Medical
Design for Miniaturization: Meeting the Demand for Smaller,...
Webinars: AR/AI
