You searched for: “combustion
combustion
1. The process of burning gas, liquid, or a solid, in which the fuel is oxidized, producing heat, and/or work, and often light.
2. A chemical change; especially, oxidation, accompanied by the production of heat and light.
3. Violent anger or agitation: "Combustion within the populace slowly built up to the point of revolution."
4. Burning; consumption by fire; the development of light and heat from the chemical combination of a substance with oxygen.
5. Etymology: from Latin combustus, past participle of comburere, "to burn up"; from urere "to burn".

Combustion includes thermal, hydrodynamic, and chemical processes. It starts with the mixing of fuel and an oxidant, and sometimes in the presence of other species or catalyst.

The combustion products include heat, light, chemical species, pollutants, mechanical work, and plasma.

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Word Entries containing the term: “combustion
biomass combustion
A technology that extracts heat energy from natural materials so it can then be used for a variety of heat and power applications.
combustion analyzer
An instrument used to measure the efficiency of a combustion process; such as, by measuring levels of carbon monoxide, nitrogen dioxide, or sulfur dioxide.
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combustion chamber volume
1. The volume of a combustion chamber or the space above a piston measured in c.c. (cubic centimeters.
2. The volume of the combustion chamber when a piston is located directly at the top center.
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combustion chamber; blast chamber, firing chamber, rocket chamber
1. In an internal combustion engine, the space above a piston in which combustion occurs.
2. In a furnace, any space in which combustion occurs, or the space in which combustion of gaseous products occurs; such as, oil or kerosine is burned to provide heat.
3. In space technology, the part of a liquid rocket, ramjet, or gas turbine engine in which the combustion of propellants takes place at high pressure.
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combustion controls
Devices that automatically regulate firing rates at predetermined air-fuel ratios in accordance with load demands.
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combustion deposit
1. The ash residue that results from the burning of fuel, occurring on the heat-exchange surfaces of a combustion chamber.
2. A layer of ash on the heat-exchange surfaces of a combustion chamber, which comes from the burning of a fuel.
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combustion efficiency
1. The ratio of heat produced in a combustion process to the heat that would be produced if a combustion were complete.
2. The ratio of heat that is actually developed in a combustion process to the heat that would be released if the combustion were perfect.
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combustion engine
1. An engine operated by the energy released from a combustible fuel that is fed to the engine.
2. An engine that operates by the energy of combustion of a fuel.
3. Any of various types of engines driven by energy produced by combustion.
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combustion engineering
1. The study of heat liberated and absorbed by the combustion process as applied to furnace efficiency and design.
2. The design of combustion furnaces for a given performance and thermal efficiency, involving the study of the heat liberated in the combustion process, the amount of heat absorbed by heat elements, and heat-transfer rates.
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combustion furnace
1. A heating device which is used to analyze the elemental or the basic content of organic compounds.
2. A furnace that has a source of heat which is the energy released in the oxidation of fossil fuel.
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combustion instability (s) (noun), combustion instabilities (pl)
The abnormality or irregularity in a process involving the combustion of a source of energy or fuel: In aerospace engineering, combustion instability may take place in a rocket engine.

In classifying combustion instabilities there are three types which are related to engines: chamber instabilities, intrinsic instabilities, and system instabilities.

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combustion knock, engine knock
In spark ignition engines, the sound and other effects associated with ignition and rapid combustion of the last part of the charge to burn, before the flame front reaches it.
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combustion nucleus
1. A condensation nucleus formed as a result of industrial, transport, or natural combustion processes.
2. A condensation nucleus which arises as a result of natural or industrial combustion procedures.
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combustion pressure
The pressure created during the combustion of the air/fuel mixture in a cylinder, measured in pounds per square inch.
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combustion rate
1. The burning rate of any substance.
2. The rate at which a substance burns.
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combustion residue
Carbon and other deposits resulting from combustion.
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combustion shock
1. A shock resulting from an abnormal burning of fuel in an internal combustion engine which is caused by preignition or fuel-air detonation; or in a diesel engine, the uncontrolled burning of fuel accumulated in a combustion chamber.
2. A sudden disturbance in an internal combustion engine which occurs when the fuel is being improperly burned because of ignition or control errors.
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combustion train
1. The arrangement of instruments and apparatuses for chemical analysis. 2. An arrangement of an apparatus for elementary organic analysis.
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combustion tube
1. A glass, silica, or porcelain tube, that is resistant to high temperatures, which is a component of a combustion train.
2. A tube, resistant to high temperatures and usually composed of glass, silica, or porcelain.

It is used to hold samples during pyrolysis (decomposition of complex molecules by heat) or elemental (fundamental) analysis.

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combustion turbine, gas turbine
1. A turbine that generates power from the combustion of a fuel.
2. A heat engine that converts the energy of fuel into work by using compressed, hot gas as the working medium and which usually delivers its mechanical output power either as torque through a rotating shaft (industrial gas turbines) or as jet power in the form of velocity through an exhaust nozzle (aircraft jet engines).
3. An internal combustion engine in which liquid or gaseous fuel is used to generate mechanical energy through a rotating shaft, which then drives an electric generator or another piece of equipment.
4. One of a class of heat engines that use fuel energy to produce mechanical output power, either as torque through a rotating shaft (industrial gas turbines) or as jet power in the form of velocity through an exhaust nozzle (aircraft jet engines).

The fuel energy is added to the working substance, that is gaseous in form and most often air, either by direct internal combustion or indirectly through a heat exchanger.

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combustion wave
1. A zone of combustion which travels along a narrow path through a burning substance.
2. A zone of burning propagated or transmitted through a combustible medium.
3. The zoned, reacting, gaseous material formed when an explosive mixture is ignited.
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spark-ignition combustion cycle, spark ignition combustion cycle; Otto cycle
1. A thermodynamic combustion cycle consisting of four processes that are used in mechanical engineering:
  • An air-fuel mixture is drawn into the cylinder and compressed.
  • Heat transfer is added by the spark ignition of the fuel mixture in the cylinder.
  • The gases produced by this combustion expand to move the piston downward for the power stroke.
  • The burned gases in the cylinder are expelled.
2. A thermodynamic process for the conversion of heat into work; for example, the sequential suction, compression, ignition, and expulsion in a four-stroke engine.

Named after Nikolaus August Otto (1832-1891), a German engineer and inventor.

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sparkling combustion
1. A combustion without a violent explosion or to burn with a sudden and sparkling combustion and to vaporize suddenly; that is, to snap and crackle with slight explosions when heated, because of the action of that intense heat.
2. Slightly explosive; liable to snap and crackle when heated; as salt does.
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Word Entries at Get Words: “combustion
combustion
1. The process of burning a fuel with oxygen from the air to release energy, producing steam and carbon dioxide as byproducts.

Unless things burn completely, toxic exhaust gases; such as, carbon monoxide and other forms of pollution are also produced.

2. An act of burning and a chemical reaction (oxidation) to produce heat, work, light, etc..
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Word Entries at Get Words containing the term: “combustion
biomass combustion
A technology that extracts heat energy from biomass so that it can then be used for a variety of heat and power applications.
This entry is located in the following unit: Biomass Elements and Uses + (page 1)
internal combustion engine
An engine that burns fuel inside closed metal cylinders.

External combustion engines; such as, steam engines, produce power less efficiently by burning fuel in an external chamber to heat a liquid or gas, which then moves a piston or a turbine.

Each piston in an internal combustion engine makes four "strokes"

    The four-stroke cycles include explosions inside the engine's cylinders, on top of the pistons, and the blast force pushes the pistons down; then, the crankshaft swings around and pushes the pistons back up for the next stage in the cycle. The cycles for one piston are described in the following sequences:

  1. The piston moves down, sucking in air through the inlet valve while a tiny squirt of gasoline is injected into the air.
  2. The inlet valve at the top closes, trapping everything inside and then the piston moves up, squeezing the air and gasoline tightly together.
  3. When the piston reaches the top, a carefully timed spark sets fire to the gasoline; as the gas burns explosively, forcing the piston back down.
  4. Finally, the piston moves back up and pushes the burned gases out of the outlet valve which leave the car through the exhaust.
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