effective exhaust velocity वाक्य
उदाहरण वाक्य
मोबाइल
- Where V _ \ mathrm { e } is the effective exhaust velocity, M _ { \ mathrm { initial } } the initial mass, and M _ { \ mathrm { final } } the mass of the rocket at the point of burnout of each stage.
- The specific impulse in terms of propellant mass spent ( multiplying the weight-based " I " sp in seconds by " g " 0 ) is in units of distance per time, which is an artificial velocity called the " effective exhaust velocity ".
- To attain and maintain such high speeds, Reaction Engines Limited would need to develop its newly designed concept engine called the Scimitar, which exploits the Mach 5 throughout flight with an effective exhaust velocity of 40, 900 m / s or specific impulse of 4170 s, SFC.
- This is termed " exhaust velocity ", and after allowance is made for factors that can reduce it, the "'effective exhaust velocity "'is one of the most important parameters of a rocket engine ( although weight, cost, ease of manufacture etc . are usually also very important ).
- Where \ displaystyle m _ f / m _ 0 is the ratio of final mass to initial mass ( i . e ., one minus the mass fraction ), \ displaystyle \ Delta v is the change in the vehicle's velocity as a result of the fuel burn and \ displaystyle v _ e is the effective exhaust velocity ( see below ).
- Note that "'effective "'exhaust velocity and "'actual "'exhaust velocity can be significantly different, for example when a rocket is run within the atmosphere, atmospheric pressure on the outside of the engine causes a retarding force that reduces the specific impulse, and the effective exhaust velocity goes down, whereas the actual exhaust velocity is largely unaffected.
- (The equation can also be written using the specific impulse instead of the effective exhaust velocity by applying the formula v _ \ text { e } = I _ \ text { sp } \ cdot g _ 0 where I _ \ text { sp } is the specific impulse expressed as a time period and g _ 0 is standard gravity H " 9.8 m / s 2 .)
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