Keyword: Computational fluid dynamics

Briefs: Sensors/Data Acquisition
To support the development of next-generation rotorcraft, precision data acquisition is required.
Articles: Energy
Learn about microvanes, one of the only types of 3D-printed parts that are FAA-approved for use on the exterior of an aircraft.
Articles: Mechanical & Fluid Systems
A regenerative, high-temperature heat exchanger doubles the efficiency of low-power turbines.
Briefs: Test & Measurement

Currently in the small arms community, with the push for lighter, stronger barrels with improved life, a more complete understanding of the bore's thermal and...

Articles: Test & Measurement

Drone aircraft and their uses have been evolving quickly, supported by a great deal of ongoing research. One area of increasing interest is the decoy drone, designed to mimic the...

Articles: Electronics & Computers

The aerospace sector places some uniquely challenging demands on electronics designers. For a start, the environments that the electronics are exposed to are much harsher...

Articles: Test & Measurement

Airplanes, one of humanity's greatest inventions, evoke feelings of awe and amazement for most people, unless you live uncomfortably close to a major airport, in which case the feeling may become annoyance and irritation....

Articles: Test & Measurement

As aerospace and defense manufacturing becomes increasingly digitized—from the earliest design stages to the factory floor and beyond—data accuracy is fundamental to...

Articles: Aerospace

The Centro de Astrobiología (CAB), a joint center of Consejo Superior de Investigaciones Cientificas and the Instituto Nacional de Tecnica Aeroespacíal...

Briefs: Test & Measurement
Coupling of Coastal Wave Transformation and Computational Fluid Dynamics Models for Seakeeping Analysis

This research focused on depth-integrated modeling of coastal wave and surf-zone processes in support of computational fluid dynamics (CFD) simulation of ship motions. There were two components of the project. The first was the development of...

Articles: Aerospace

Aircraft manufacturers face increasingly stringent standards for reducing community noise. Conventional aircraft development methods based on engineering experience,...

Articles: Aerospace

The formation of ice over lifting surfaces can affect aerodynamic performance. In the case of helicopters, this loss in lift and the increase in sectional drag forces will have a dramatic...

Articles: Sensors/Data Acquisition

As defense systems continue to shrink, corresponding thermal management concerns expand exponentially. Designers have learned that overheating can be the downfall of even the most...

Articles: Defense

Despite the continuous development of new, higher performing processors, the thirst for increased embedded computing capability remains unquenched. In fact, it seems like...

Articles: Defense

Thermal management of unmanned ground vehicles (UGVs) is more complex than other electronic equipment because they have to operate in harsh environments such as humid tropical rainforests or...

Articles: Test & Measurement
Many small unmanned aerial vehicles (SUAVs) are driven by small-scale fixed-blade propellers, and the flow produced by the propeller can have a significant impact on the aerodynamics of the...
Briefs: Defense

Currently, the two main computational tools used by the aerothermodynamics community to model hypersonic flows are Computational Fluid Dynamics (CFD), and the direct...

Articles: Aerospace

The avionics systems of military aircraft support maneuverability and situation awareness for the pilot, process essential images, operate sensors, record data, and provide...

Briefs: Software

Helicopter flight involves many multidisciplinary physics problems that are difficult to predict with today’s engineering modeling and simulation tools. Rotor aerodynamic systems...

Articles: Aerospace

Unmanned Autonomous Vehicle (UAV) systems have become possible in recent history thanks primarily to the effects of Moore’s Law — the doubling of processing power every 18...

Articles: Aerospace

The use of unmanned aerial vehicles (UAVs) has been increasing around the world as many countries have been rapidly adding UAVs to their arsenals during the past decade. One of the most...

Articles: Aerospace

When water flows over an acoustic sensor, non-acoustic pressure fluctuations caused by turbulence can decrease the signal-to-noise ratio and make it difficult to sense incoming acoustic waves....

Briefs: Software
Test and Evaluation Uses of Heterogeneous Computing

T est and evaluation of current systems is a time-consuming process that reflects both the intricacies of the object of the test and the range of equipment, personnel, and environments required. Many argue that this process consumes far too much of the time that it takes to put new systems into...

Articles: Aerospace

Fluid flow is a critical part of defense and aerospace design, whether the product is a rocket’s fuel valve or a tank’s turret-mounted electronics pod....

Briefs: Manufacturing & Prototyping
Micro-Propulsion Devices Made of Low-Temperature Co-Fired Ceramics

In the satellite industry, the trend is towards decreasing the size of satellites and clustering of small satellites. Technological advancements in microelectronics have made it more economical to launch a cluster of satellites with a single vehicle rather than the traditional...

Briefs: Physical Sciences

Supersonic combustion has been of interest for many years in order to support future Air Force hypersonic missions. The current generation of...

Briefs: Physical Sciences

A study of the aeroacoustics of a turbojet-engine test cell has been performed as one step in the development of a computational aeroacoustics capability (CAA) that could provide...

Briefs: Physical Sciences

A high-speed imaging system has been devised as a noninvasive means of collecting data on the kinematics of working models of developmental underwater or aerial vehicles that would utilize...

Briefs: Mechanical & Fluid Systems

SparkJet actuators are under investigation as means of controlling flows — especially supersonic and hypersonic flows. In one important class of potential applications, SparkJet actuators would...