| 释义 |
propulsion
pro·pul·sion P0604300 (prə-pŭl′shən)n.1. The process of driving or propelling.2. A driving or propelling force.
[Medieval Latin prōpulsiō, prōpulsiōn-, onslaught, urging on, from Latin prōpulsus, past participle of prōpellere, to drive forward; see propel.]
pro·pul′sive, pro·pul′so·ry (-sə-rē) adj.propulsion (prəˈpʌlʃən) n1. the act of propelling or the state of being propelled2. a propelling force[C15: from Latin prōpellere to propel] propulsive, proˈpulsory adjpro•pul•sion (prəˈpʌl ʃən)
n. 1. the act of propelling. 2. the state of being propelled. 3. a propelling force, impulse, etc. [1605–15; < Latin prōpuls(us) (past participle of prōpellere to propel) + -ion] pro•pul′sive (-sɪv) pro•pul′so•ry, adj. Thesaurus| Noun | 1. |  propulsion - a propelling force force - (physics) the influence that produces a change in a physical quantity; "force equals mass times acceleration"nuclear propulsion - the use of a nuclear reactor either to produce electricity to power an engine (as in a nuclear submarine) or to directly heat a propellant (as in nuclear rockets)reaction propulsion - propulsion that results from the ejection at high velocity of a mass of gas to which the vehicle reacts with an equal and opposite momentum | | 2. |  propulsion - the act of propelling actuationhuman action, human activity, act, deed - something that people do or cause to happenlaunch, launching - the act of propelling with forcelaunching - the act of moving a newly built vessel into the water for the first timedrive, driving force, thrust - the act of applying force to propel something; "after reaching the desired velocity the drive is cut off"bowl, roll - the act of rolling something (as the ball in bowling)throw - the act of throwing (propelling something with a rapid movement of the arm and wrist); "the catcher made a good throw to second base"push, pushing - the act of applying force in order to move something away; "he gave the door a hard push"; "the pushing is good exercise"pull, pulling - the act of pulling; applying force to move something toward or with you; "the pull up the hill had him breathing harder"; "his strenuous pulling strained his back"raise, heave, lift - the act of raising something; "he responded with a lift of his eyebrow"; "fireman learn several different raises for getting ladders up"ejection, forcing out, expulsion, projection - the act of expelling or projecting or ejectingjumping, jump - the act of jumping; propelling yourself off the ground; "he advanced in a series of jumps"; "the jumping was unexpected"lob - the act of propelling something (as a ball or shell etc.) in a high arcwheeling, rolling - propelling something on wheelsshooting, shot - the act of firing a projectile; "his shooting was slow but accurate"dribbling, dribble - the propulsion of a ball by repeated taps or kicks |
propulsionnoun power, pressure, push, thrust, momentum, impulse, impetus, motive power, impulsion, propelling force For some time electric propulsion has been seen as a possible answer.Translationspropel (prəˈpel) – past tense, past participle proˈpelled – verb to drive forward, especially mechanically. The boat is propelled by a diesel engine. 推進 推进proˈpeller noun a device, consisting of revolving blades, used to drive a ship or an aircraft. 螺旋槳，推進器 缧旋桨，推进器 proˈpulsion (-ˈpalʃən) noun the process of propelling or being propelled. jet-propulsion. 推進 推进proˌpelling-ˈpencil noun a pencil consisting of a metal or plastic case containing a lead that is pushed forward by a screwing mechanism. 自動鉛筆 自动铅笔
propulsion
propulsion[prə′pəl·shən] (mechanics) The process of causing a body to move by exerting a force against it. Propulsion The process of causing a body to move by exerting a force against it. Propulsion is based on the reaction principle, stated qualitatively in Newton's third law, that for every action there is an equal and opposite reaction. A quantitative description of the propulsive force exerted on a body is given by Newton's second law, which states that the force applied to any body is equal to the rate of change of momentum of that body, and is exerted in the same direction as the momentum change. In the case of a vehicle moving in a fluid medium, such as an airplane or a ship, the required change in momentum is generally produced by changing the velocity of the fluid (air or water) passing through the propulsive device or engine. In other cases, such as that of a rocket-propelled vehicle, the propulsion system must be capable of operating without the presence of a fluid medium; that is, it must be able to operate in the vacuum of space. The required momentum change is then produced by using up some of the propulsive device's own mass, which is called the propellant. See Aerodynamic force The two terms most generally used to describe propulsion efficiency are thrust specific fuel consumption for engines using the ambient fluid (air or water), and specific impulse for engines which carry all propulsive media on board. See Specific fuel consumption, Specific impulse The energy source for most propulsion devices is the heat generated by the combustion of exothermic chemical mixtures composed of a fuel and an oxidizer. An air-breathing chemical propulsion system generally uses a hydrocarbon such as coal, oil, gasoline, or kerosine as the fuel, and atmospheric air as the oxidizer. A non-air-breathing engine, such as a rocket, almost always utilizes propellents that also provide the energy source by their own combustion. Where nuclear energy is the source of propulsive power, the heat developed by nuclear fission in a reactor is transferred to a working fluid, which either passes through a turbine to drive the propulsive element such as a propeller, or serves as the propellant itself. Nuclear-powered ships and submarines are accepted forms of transportation. See Turbine propulsion propulsion
propulsion [pro-pul´shun] 1. a tendency to fall forward in walking.2. festination.pro·pul·sion (prō-pŭl'shŭn), The tendency to fall forward; responsible for the festination in paralysis agitans. [G. pro-pello, pp. -pulsus, to drive forth] propulsion The act of propelling.pro·pul·sion (prŏ-pŭl'shŭn) The tendency to fall forward; responsible for the festination in paralysis agitans. [G. pro-pello, pp. -pulsus, to drive forth]pro·pul·sion (prŏ-pŭl'shŭn) Tendency to fall forward. [G. pro-pello, pp. -pulsus, to drive forth]AcronymsSeepropellerpropulsion
Related to propulsion: rocket propulsionSynonyms for propulsionnoun powerSynonyms- power
- pressure
- push
- thrust
- momentum
- impulse
- impetus
- motive power
- impulsion
- propelling force
Synonyms for propulsionnoun a propelling forceRelated Words- force
- nuclear propulsion
- reaction propulsion
noun the act of propellingSynonymsRelated Words- human action
- human activity
- act
- deed
- launch
- launching
- drive
- driving force
- thrust
- bowl
- roll
- throw
- push
- pushing
- pull
- pulling
- raise
- heave
- lift
- ejection
- forcing out
- expulsion
- projection
- jumping
- jump
- lob
- wheeling
- rolling
- shooting
- shot
- dribbling
- dribble
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