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How to calculate flow rate for a ramjet

Anonymous Tue 06 Aug 21:07:00 2019 No.10869263 View Reply Original Report

Quoted By: >>10869313 >>10869329 >>10869348 >>10869927

I can’t find any equation based on this. How to use fancy math to do so?

Anonymous

Anonymous Tue 06 Aug 2019 21:35:26 No.10869313 Report

Quoted By: >>10869332

>>10869263
I am a flow technician in aviation bullcrap. I don't know but it will be effected by altitude, temperature, humidity. I bet there is math but we just measure shit. Dents, scratches, dirt will change airflow. Check out Charels and boyles gas laws and bernoullis principle and shit, i guess.

Anonymous

Anonymous Tue 06 Aug 2019 21:43:27 No.10869329 Report

Quoted By:

>>10869263
hmmm...maybe:
$\text{# of moles out} = \text{# of moles of air that don't react with fuel} + \text{# of moles which is byproduct of the fuel + air combustion} + \text{# moles leftover fuel}$ .

Anonymous

Anonymous Tue 06 Aug 2019 21:44:51 No.10869332 Report

Quoted By: >>10869927

>>10869313
Okay thank you good man. Do you guys ever take a purely geometrical approach? Any way to model airflow in a purely geometric way to simplify it? And how do you guys measure it?

Just curious questions

Anonymous

Anonymous Tue 06 Aug 2019 21:53:05 No.10869348 Report

Quoted By: >>10869372 >>10869927

>>10869263
It will be in any fluid mechanics book under the compressible flow chapter. Something something A*

Anonymous

Anonymous Tue 06 Aug 2019 21:59:52 No.10869372 Report

Quoted By:

>>10869348
okay thank you will check that out

Anonymous

Anonymous Wed 07 Aug 2019 01:46:22 No.10869927 Report

Quoted By:

>>10869332
Well yeah but it's just shoot from the hip geometry. What goes in, goes out so (for air) usually expressed as a differential pressure. A greater difference "pressure drop" indicates more flow. Im little more than a grease monkey but i have some good material I'll try and dig up if people be interested in this shit. I won't find it soon. Yeah what he said >>10869348 .
>>10869263
Its pretty retarded in the real world. Bunch of trail and error.

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