Jet engine Definition and 75 Threads

A jet engine develops 1 * 10^5 n of thrust in moving the airplane forward at a speed of 900 km/h. What is the power developed by the engine? I thought I needed to convert 900 km/h to m/s, so I did and I got 15000 m/s. The only equation I see to use for this is: P = Fvcosθ When I...

I`ve had a new idea in designing a pulse jet by adding a valve in it... According to my intuition and logically this increases the output many folds and I`ve given sufficient reasons for suggesting it. I have a powerpoint of my idea that I have made and I request any of you to please go through...

hi how to find air mass flow rate in jet engine? we are using thrust/Isp equation to find the mass flow rate for rocket equation. is that any formula available for finding the mass flow rate in jet engine

HI In Jet Engine, i want to know that the compressed air prssure changes before it enters into the combustion chamber from the compressor in various altitude and velocity or it is consatnt for altitude and velocity?

Homework Statement A jet engine is being tested in the laboratory and it is found to consume 20 kg of air per second while using 0.2 kg of fuel per second. Given that the exit velocity of the gases is 500 m s-1, calculate the thrust generated by the engine. Homework Equations F = M(V-U)...

If you were to design a pulse jet engine where would you start? How do you determine the diameter and length of the tail pipe? How do you determine the diameter and length of the combustion chamber? How do you determine the area of the air intake valve system? How do you determine...

Does anyone know any Forumulas or how to calculate the dimensions of a pulse jet engine? I have already built several PULSE JET engines that run by scaling up an existing hobby engine to a larger size. Problem is the scaled up models run but maybe they could run better. I can not find any...

(This is a homework/lab assignment but thought it better suits in this category) Hi, This is a scaled model and I am given the pressure tap locations on each rakes. Also given is the pressure data. Inlet distortion formula is given by: Pdist = (Pmax - Pmin)/Pavg Question is to find...

A rocket flying in the atmosphere and flying in the outer space. In which conditions does it have stronger thrust? Provided every parameter is the same, even the air drag is considered negligible (in fact it's big).

Homework Statement http://img183.imageshack.us/img183/3628/jetlf0.jpg http://img393.imageshack.us/img393/1759/jet2iu4.jpg Homework Equations The Attempt at a Solution H = U + pV is the enthalpy, and hence the enthalpy per unit mass is h = U/m + pV/m which I have...

Hey! I am trying to find some figures on the environmental conditions a turbine blade in a Jet Engine would have to withstand, and the materials that are necessary to prevent the blade from failing. I have taken the example of the 'Trent Engine' or so I think it is called. I have read that...

last year i did a jet engine workshop n one of the instructor there told us that both the engines on an aircraft(ofcourse an aircraft with an engine on each wing or maybe more on each) are run in same direction(i mean same sense of rotation) n this induces a transeverse force of the aircraft...

Hi all, This has been bugging me all day, so I thought I'd seek the help and advice of the internet. When a plane is stationary, you’d have to say that its jet engines are doing no useful work. The engines apply a static force on the airframe and could be said to be running at zero...

A Jet Engine doubt... Hi folks... My aerospace propulsion professor taught me that, in the combustion chamber of a jet engine, during combustion, the pressure instead of increasing, decreases. I have 2 questions. 1) Is it true? 2) If yes, how? How and in what way does temperature, and...

can anybody please tell me the temperature (degrees Celsius please.) there is at the back of a normal turbine jet engine (or something like that:-p )?? i couldn't find it on wikipedia or something like that:frown: so i ask it here:approve:

Homework Statement Calculate the engine thrust required to produce an acceleration of 4 m/s^-2 in a jet of mass 800 kg as it takes off along the runway. The air resistance is 500 N Appreciate if anyone can check if I have used the correct equation, and my answer. Homework Equations F - R...

Hello, I'm Arman, new user here. I'm a jet-engine designer and I'm really interested in building and running different types of jet engines. I have quetion now: Some amount of air enters a cone shaped pipe with a minimum diameter of 6 cm and a maximum diameter of 10 cm, and a length of 7 cm...

OK I have question about the way jet engine works. I am only 16 and haven't got into any of this stuff in hs yet. my buddy and I were having a disscusion about the way a jet and rockets work and got stump by something. I looked up online how they both work and heard of people refferring to a...

Has anyone here ever built a small Jet engine? Just generally interested in how you did it and from what parts thanks

For those with a strong death wish only.

I half remember that jet engine intakes were circular a few years ago. Now they have a squashed appearance with the bottom part quite flat. This isn't new as the first German jet at the end of World War II had the same shape but it seems relatively new on airline jet engines. So, why are...

When fuel is burnt in the jet engine, what is the major component of the hot gases thrown out of the back - the CO2 formed (I know CO2 is not the only component but it is the major one) from the fuel or the air entering the jet as a whole? In other words, does the heat of the burning fuel...

The jet engine of an airplane takes in 100 kg of air per second, which is burned with 4.2 kg of fuel per second. The burned gases leave the plane at a speed of 550 m/s (relative to the plane). If the plane is traveling 270 m/s. (a) Determine the thrust due to ejected fuel. This...

What do you think of this?. I was a brainwave when I sat on the toilet :smile: . A typical jet engine compresses the air when it comes into the compressor, burns it with fuel, and expands it in the turbine. Approximating there is no difference of static pressure between the entrance and the...

I am in the process of writing a report on the Physics of Jet engines and I have come across a problem I cannot comprehend. In the exhaust of many jet engines they allow the atmospheric air to mix with the air from the engine to reduce exhaust noise. From what I understand this allows the...