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See all on WikipediaPropulsive efficiency - Wikipedia
Propulsive efficiency is defined as the ratio of propulsive power (i.e. thrust times velocity of the vehicle) to work done on the fluid. In generic terms, the propulsive power can be calculated as follows: $${\displaystyle P_{\mathrm {prop} }=T\times v_{\infty }}$$ where $${\displaystyle T}$$ represents thrust and … See more
In aerospace engineering, concerning aircraft, rocket and spacecraft design, overall propulsion system efficiency $${\displaystyle \eta }$$ is the efficiency with which the energy contained in a vehicle's See more
1. ^ ch10-3
2. ^ K.Honicke, R.Lindner, P.Anders, M.Krahl, H.Hadrich, K.Rohricht. Beschreibung der Konstruktion der Triebwerksanlagen. Interflug, Berlin, 1968
3. ^ Spittle, Peter. "Gas turbine technology" See moreMost aerospace vehicles are propelled by heat engines of some kind, usually an internal combustion engine. The efficiency of a heat engine relates how much useful work is output for a … See more
• Vehicular metrics – Metrics that denote the relative capabilities of various vehicles
• Specific fuel consumption (thrust) – Fuel efficiency of an engine design with respect to thrust output See moreWikipedia text under CC-BY-SA license Spacecraft propulsion - Wikipedia
Spacecraft propulsion technology can be of several types, such as chemical, electric or nuclear. They are distinguished based on the physics of the propulsion system and how thrust is generated. Other experimental and more theoretical types are also included, depending on their technical maturity. Additionally, there may be credible meritorious in-space propulsion concepts …
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Propulsion - Wikipedia
Propulsion is the generation of force by any combination of pushing or pulling to modify the translational motion of an object, which is typically a rigid body (or an articulated rigid body) …
Why this formula says jet engine is efficient at any speed?
Wikipedia gives the following equation for the efficiency of the jet engine, here: $$\eta_p = \frac{2}{1 + \frac{v_e}{v}}$$ Where V is the aircraft speed and Ve is the exhaust speed.
Jet Propulsion/Propulsive efficiency - Wikibooks
The propulsive efficiency is defined as: The mechanical work generated by the engine is crudely split between the work difference between the input and exit mass flows from the engine as …
Jet Propulsion/Thermodynamic Cycles - Wikibooks
Nov 17, 2017 · Propulsive efficiency work transmitted to vehicle vs. total engine output work; propulsive work delivered to the total mechanical energy produced by the engine. η Pr
UNIFIED PROPULSION LECTURE #1 - MIT
In the first lecture we arrived at general expressions that related the thrust of a propulsion system to the net changes in momentum, pressure forces, etc. Now we will look at how efficiently the propulsion system converts one form of …
Propulsive Efficiency - an overview | ScienceDirect Topics
A gain in propulsive efficiency consists in decreasing the residual kinetic energy in the exhaust jet. The highest propulsive efficiency is reached when the difference between gas jet speed and …
Propulsive efficiency - Wikiwand
Propulsive efficiency is defined as the ratio of propulsive power (i.e. thrust times velocity of the vehicle) to work done on the fluid. In generic terms, the propulsive power can be calculated as …
Propeller theory - Wikipedia
Propeller theory is the science governing the design of efficient propellers. A propeller is the most common propulsor on ships, and on small aircraft. History. In the second half of the nineteenth …
Jet engine | Design, Types, & Functionality | Britannica
Oct 18, 2024 · The efficiency of a propulsor, propulsive efficiency ηp, is the portion of the available energy that is usefully applied in propelling the aircraft compared to the total energy of the jet …
propulsion - Why does this formula say rocket efficiency depends …
Apr 29, 2020 · Wikipedia gives the following equation for the efficiency $\eta_p$ of an engine here: $$\eta_p= \frac {2\, (\frac {v} {v_e})} {1 + ( \frac {v} {v_e} )^2 }$$ where $v$ is the rocket …
Jet engine performance - Wikipedia
A propulsion device, a nozzle, has to be added to a gas turbine engine to convert its energy into thrust. The efficiency of this conversion (Froude or propulsive efficiency) reflects work done in …
Propulsive efficiency - Wikipedia - Al-Quds University
Aug 22, 2022 · In aerospace engineering, concerning aircraft, rocket and spacecraft design, overall propulsion system efficiency is the efficiency with which the energy contained in a …
Propulsive efficiency | mechanics | Britannica
The efficiency of a propulsor, propulsive efficiency ηp, is the portion of the available energy that is usefully applied in propelling the aircraft compared to the total energy of the jet stream. For the …
Jet aircraft - Wikipedia
A jet aircraft (or simply jet) is an aircraft (nearly always a fixed-wing aircraft) propelled by one or more jet engines. Whereas the engines in propeller-powered aircraft generally achieve their …
4.0 In-Space Propulsion - NASA
Mar 14, 2024 · The propulsion system enables detumbling and pointing for communication back to Earth. The propulsion system uses a 3D-printed propellant tank to reduce part count and make …
Rocket engine - Wikipedia
Here, "rocket" is used as an abbreviation for "rocket engine". Thermal rockets use an inert propellant, heated by electricity (electrothermal propulsion) or a nuclear reactor (nuclear …
Fuel economy in aircraft - Wikipedia
Between 1950 and 2018, efficiency per passenger grew from 0.4 to 8.2 RPK per kg of CO₂. [1]The fuel economy in aircraft is the measure of the transport energy efficiency of aircraft. Fuel …
Ramjet - Wikipedia
Due to the stoichiometric combustion temperature, efficiency is usually good at high speeds (around Mach 2 – Mach 3, 680–1,000 m/s, 2,500–3,700 km/h, 1,500 ... A notable example was …
Maglev - Wikipedia
Propulsion is typically provided by a linear motor. [7] ... The vehicle, under development since 2018, has a 30 percent increase in traction efficiency and a 60 percent increase in speed over …
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