“propellant”的概念、定义、翻译、参考文献-科学参考

propellant

Space Exploration

A substance burned in a rocket for propulsion. With bipropellant, two propellants are used: oxidizer and fuel are stored in separate tanks and pumped independently into the combustion chamber. Liquid oxygen (oxidizer) and liquid hydrogen (fuel) are common propellants, used, for example, in the space shuttle main engines. The explosive charge that propels a projectile from a gun is also called a propellant.

Chemistry

1. A substance that burns rapidly in a controlled way, used to propel a projectile (e.g. from a gun). In firearms, gunpowder and cordite are common examples.
2. A fuel used in a rocket engine. Usually the propellant is a fuel and an oxidizer; for example kerosene or liquid hydrogen with a liquid oxygen propellant.
3. A substance used to produce the spray in an aerosol can. Aerosol propellants are volatile substances that can be liquefied under pressure and are able to dissolve the working substance. When the pressure is released, the liquid vapourizes producing the spray. Formerly chlorofluorocarbons were used but their use has been discontinued because of their effect on the ozone layer. Most aerosol cans use liquid hydrocarbon mixtures as the propellant.

Chemical Engineering

1. A chemical substance used as a fuel that burns in a controlled manner and is used to propel projectiles such as rockets.

2. A volatile substance that is used to produce a spray in an aerosol can. It can be liquefied by pressure and dissolved into the working substance. On release of pressure, the liquefied propellant vaporizes producing the spray. Chlorofluorocarbons (CFCs) were once widely used but have been discontinued due to their harmful effects on the ozone in the atmosphere; they have now been largely replaced by hydrocarbons such as pentane or mixtures of hydrocarbons.

单词	propellant
释义	propellant Space Exploration A substance burned in a rocket for propulsion. With bipropellant, two propellants are used: oxidizer and fuel are stored in separate tanks and pumped independently into the combustion chamber. Liquid oxygen (oxidizer) and liquid hydrogen (fuel) are common propellants, used, for example, in the space shuttle main engines. The explosive charge that propels a projectile from a gun is also called a propellant. Chemistry 1. A substance that burns rapidly in a controlled way, used to propel a projectile (e.g. from a gun). In firearms, gunpowder and cordite are common examples. 2. A fuel used in a rocket engine. Usually the propellant is a fuel and an oxidizer; for example kerosene or liquid hydrogen with a liquid oxygen propellant. 3. A substance used to produce the spray in an aerosol can. Aerosol propellants are volatile substances that can be liquefied under pressure and are able to dissolve the working substance. When the pressure is released, the liquid vapourizes producing the spray. Formerly chlorofluorocarbons were used but their use has been discontinued because of their effect on the ozone layer. Most aerosol cans use liquid hydrocarbon mixtures as the propellant. Chemical Engineering 1. A chemical substance used as a fuel that burns in a controlled manner and is used to propel projectiles such as rockets. 2. A volatile substance that is used to produce a spray in an aerosol can. It can be liquefied by pressure and dissolved into the working substance. On release of pressure, the liquefied propellant vaporizes producing the spray. Chlorofluorocarbons (CFCs) were once widely used but have been discontinued due to their harmful effects on the ozone in the atmosphere; they have now been largely replaced by hydrocarbons such as pentane or mixtures of hydrocarbons.
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