Engineering

New engine capability accelerates advanced vehicle research

In the quest for advanced vehicles with higher energy efficiency and ultra-low emissions, Oak Ridge National Laboratory researchers are accelerating a research engine that gives scientists and engineers an unprecedented view ...

Engineering

Engineers conduct test of rocket engine powered by plastic waste

A team of engineers with Pulsar Fusion has conducted a ground test of its plastic-waste-powered rocket engine at the UK's Ministry of Defence military base in Salisbury last week. The team has posted a video of the test on ...

Electronics & Semiconductors

Combustion creates Braille display for electronics

Imagine an iPad or a Kindle for the blind, with inflatable Braille that changes shape under a user's touch. A Cornell-led collaboration has made a crucial component for such a technology: A haptic array of densely packed ...

Energy & Green Tech

Electric vehicles cheaper than combustion by 2027: study

Electric cars will be cheaper to build than fossil fuel vehicles across Europe within six years and could represent 100 percent of new sales by 2035, according to a study published Monday.

Hi Tech & Innovation

Mazda files patent for hybrid rotary engine (Update)

Rotary engines that once powered the gorgeous Mazda RX-7 two-seater, rear-wheel drive coupe—a five-time winner of a coveted spot on Car and Driver's Ten Best autos list—were phased out by 2012. Their popularity in the ...

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Combustion

Combustion (English pronunciation: /kəmˈbʌs.tʃən /) or burning is the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species. The release of heat can result in the production of light in the form of either glowing or a flame. Fuels of interest often include organic compounds (especially hydrocarbons) in the gas, liquid or solid phase.

In a complete combustion reaction, a compound reacts with an oxidizing element, such as oxygen or fluorine, and the products are compounds of each element in the fuel with the oxidizing element. For example:

A simple example can be seen in the combustion of hydrogen and oxygen, which is a commonly used reaction in rocket engines:

The result is water vapor.

Complete combustion is almost impossible to achieve. In reality, as actual combustion reactions come to equilibrium, a wide variety of major and minor species will be present such as carbon monoxide and pure carbon (soot or ash). Additionally, any combustion in atmospheric air, which is 78% nitrogen, will also create several forms of nitrogen oxides.

This text uses material from Wikipedia, licensed under CC BY-SA