How Does Thrust to Weight Ratio Impact Engine Efficiency?

[blade86]

i think you have confused mechanical design with an idea. there are no calculations or measurements provided. Perhaps if you can draft the pictures out or use CAD and provide some of the formulas etc , then people can better assess how workable this project may be.

 

[chhitiz]

@ grey it is not otto cycle.more like a three stroke cycle.
@ bystander yes, but we can't use gas turbines in automobiles. for one thing, they operate at very high temperatures and pressures
@ blade well, I'm trying to, but could people anyways suggest a way to calculate efficiency or something

 

[Unit91Actual]

It looks like you made that in Abaqus (?). If so, did you run an FE simulation to see what types of stresses are in the engine? One of the biggest concerns in efficiency is thrust to weight ratio (T/W). If you want to take this to the next step, I recommend seeing what your stresses are like, and determining if you have too much / too little material. Factors of safety are also important.

 

[atthepointe]

I didn't see anything.

 

[gmax137]

... guide me as to how to calculate, at least in theory the efficiency ...

... can we simply guess the efficiency based on c.r.? is there a way to calculate the precise efficiency of a completely new design?

... could people anyways suggest a way to calculate efficiency or something ...

What exactly do you mean by 'efficiency'? Can you write down what you mean in words, and then take a stab and quantifying it? Why do you think calculating it is any different then the 'efficiency' calculations described in the automotive engineering textbooks?

 

[chhitiz]

It looks like you made that in Abaqus (?). If so, did you run an FE simulation to see what types of stresses are in the engine? One of the biggest concerns in efficiency is thrust to weight ratio (T/W). If you want to take this to the next step, I recommend seeing what your stresses are like, and determining if you have too much / too little material. Factors of safety are also important.

it was made in catia. and as far as i know, there is no way of getting the stresses in it.

What exactly do you mean by 'efficiency'? Can you write down what you mean in words, and then take a stab and quantifying it? Why do you think calculating it is any different then the 'efficiency' calculations described in the automotive engineering textbooks?

efficiency is how much of the chemical energy of the fuel is actually converted into useful work. and calculating it is different because this design will have a totally different thermodynamic cycle