Fuel flow, heat fluctuations drive dangerous oscillations in rocket engines

Combustion engines can develop high frequency oscillations, leading to structural damage to the engines and unsafe operating conditions. A detailed understanding of the physical mechanism that causes these oscillations is required but has been lackin.....»»

Category: topSource:  physorgJun 15th, 2021

Artificial stomach reveals fluid dynamics of food digestion

In efforts to fight obesity and enhance drug absorption, scientists have extensively studied how gastric juices in the stomach break down ingested food and other substances. However, less is known about how the complex flow patterns and mechanical st.....»»

Category: topSource:  theglobeandmailRelated News12 hr. 26 min. ago

Genesis GV70 first drive: New money

Hyundai's luxury brand launches a fashion-forward small SUV......»»

Category: topSource:  digitaltrendsRelated News12 hr. 27 min. ago

SpaceX takes big step toward Super Heavy’s first orbital flight

SpaceX is in the latter stages of preparing its massively powerful Super Heavy rocket for flight, fixing 29 Raptor engines to its base......»»

Category: topSource:  digitaltrendsRelated NewsAug 3rd, 2021

Pentagon Believes Its Precognitive AI Can Predict Events "Days In Advance"

The Drive reports that US Northern Command recently completed a string of tests for Global Information Dominance Experiments (GIDE), a combination of AI, cloud computing and sensors that could give the Pentagon the ability to predict events "days in.....»»

Category: topSource:  slashdotRelated NewsAug 3rd, 2021

Finding the cause of a fatal problem in rocket engine combustors

Rocket engines contain confined combustion systems, which are essentially combustion chambers. In these chambers, nonlinear interactions among turbulent fuel and oxidizer flows, sound waves, and heat produced from chemical reactions cause an unstable.....»»

Category: topSource:  theglobeandmailRelated NewsAug 3rd, 2021

Team uses 3D printing to optimize flow-through electrodes for electrochemical reactors

To take advantage of the growing abundance and cheaper costs of renewable energy, Lawrence Livermore National Laboratory (LLNL) scientists and engineers are 3D printing flow-through electrodes (FTEs), core components of electrochemical reactors used.....»»

Category: topSource:  theglobeandmailRelated NewsAug 3rd, 2021

SpaceX installed 29 Raptor engines on a Super Heavy rocket last night

Progress on the regulatory side of things remains murky, though. Image of 29 Raptor rocket engines installed on a Super Heavy booster. (credit: Elon Musk/Twitter) Sometimes it is difficult to write objectively about the rate at which SpaceX ma.....»»

Category: topSource:  pcmagRelated NewsAug 2nd, 2021

New material offers ecofriendly solution to converting waste heat into energy

Perseverance, NASA's 2020 Mars rover, is powered by something very desirable here on Earth: a thermoelectric device, which converts heat to useful electricity......»»

Category: topSource:  physorgRelated NewsAug 2nd, 2021

A higher-yield fuel catalyst

Oak Ridge National Laboratory researchers have developed a new catalyst for converting ethanol into C3+ olefins—the chemical building blocks for renewable jet fuel and diesel—that pushes the amount produced to a record-high 88%, a more than 10%.....»»

Category: topSource:  physorgRelated NewsAug 2nd, 2021

New solid-state thermal diode developed with better rectification performance

The effective control of heat transfer is important in improving energy efficiency. The thermal diode is one of the key elements of heat flow control. Like the current rectification effect found in electronic diodes, heat flow is easily maintained in.....»»

Category: topSource:  physorgRelated NewsAug 2nd, 2021

Don"t be fooled by signs of recovery: Pandemics weaken the flow of business ideas for seven years

The UK continues on its path to economic recovery from COVID. According to the latest survey data from the Office for National Statistics, the proportion of companies seeing their turnover reduced by COVID in July 2021 was just 29%, compared to 65% i.....»»

Category: topSource:  physorgRelated NewsAug 2nd, 2021

No "eureka moment": the evolution of climate science

What if Earth's atmosphere was infused with extra carbon dioxide, mused amateur scientist Eunice Foote in an 1856 research paper that concluded the gas was very good at absorbing heat......»»

Category: topSource:  physorgRelated NewsAug 2nd, 2021

Watch NASA lift the Starliner spacecraft onto a rocket ahead of launch

Watch NASA lift Boeing's Starliner spacecraft onto a ULA rocket at Cape Canaveral ahead of Tuesday's highly anticipated test flight......»»

Category: topSource:  digitaltrendsRelated NewsAug 1st, 2021

Drive to charge packagers for recycling, but industry fights

States across the U.S. are looking to adopt new recycling regimes that require producers of packaging to pay for its inevitable disposal—but industry is digging in to try to halt the movement......»»

Category: topSource:  physorgRelated NewsJul 31st, 2021

Rocket Lab Successfully Carries a US Military Satellite Into Orbit

"Resuming launches after a mission failure two months ago, Rocket Lab successfully placed a small U.S. military research and development satellite into orbit Thursday following a fiery liftoff from New Zealand..." reports Spaceflight Now: Heading eas.....»»

Category: topSource:  slashdotRelated NewsJul 31st, 2021

World"s first commercial re-programmable satellite blasts into space

The world's first commercial fully re-programmable satellite lifted off from French Guiana on Friday on board an Ariane 5 rocket, ushering in a new era of more flexible communications......»»

Category: topSource:  physorgRelated NewsJul 31st, 2021

The 72 best movies on HBO Max right now

Continue your cinematic journey this summer by exploring the vast library of movies that HBO Max has to offer. There's no better way to beat the heat!.....»»

Category: topSource:  digitaltrendsRelated NewsJul 31st, 2021

Why you shouldn’t roll the dice on a secondhand GPU

Shopping on the secondhand market for a graphics card is dangerous, especially if you want your card to perform as well as it should......»»

Category: topSource:  digitaltrendsRelated NewsJul 31st, 2021

Amazon Delivery Companies Routinely Tell Drivers To Bypass Safety Inspections

Amazon delivery companies around the U.S. are instructing workers to bypass daily inspections intended to make sure vans are safe to drive. From a report: Amazon requires contracted delivery drivers to inspect their vehicles at the beginning and end.....»»

Category: topSource:  slashdotRelated NewsJul 31st, 2021

America’s favorite truck goes hybrid: The Ford F-150, reviewed

Hybridization offers decent fuel economy improvement and a lot more power. The 2021 F-150 4X4 SuperCrew Lariat. [credit: Eric Bangeman.....»»

Category: topSource:  arstechnicaRelated NewsJul 30th, 2021