flawed though vsub 1 is only trivial until the engine has spooled up to self sustaining ... at which point v1 is NOT trivial and is mandatory ... so he imparts an extreme error into his calculations on the order of 20 times
As the result is 117KN of thrust, how many power is in this air movement. By the formula P=Thrust x Velocity/2 we have 117000x783/2 = 46MW, like 500 car engines. As the fuel consumption is 80MW (from given 40x2MJ/s ) the efficiency is 58%.
The exit speed of 783m/s is supersonic, but by what value? By mach=1.7 or by mach=2.26? The value 1.7 is (as i see in other sites) if consider the sound speed related to the temperature of exit gas itself (sqr(1.4x287x526)=460m/s) , but is mach 2.26 if consider sound speed 340m/s as the engine is at ground level (300Kelvin ambient) as the table fighter-planes.com/jetmach1.htm .
so it enters the turban .... that would be a very long silk scarf worn about the head ... or did you mean turbine ... like wine it is a long i not a short i ... ENUNCIATION is key there is no long silk scarf head wrap inside a jet turbine engine ...
Vsub1 is only negligible until the engine has spooled up to sustaining operation ... at which point vsub1 is NOT trivial because the compressor is SUCKING air in above ambient air speed .... and as the plane begins to roll the ambient air speed increases as the plane moves faster ... therefore Vsub1 is never able to be considered trivial and MUST ALWAYS BE calculated in.
@@zerothcore3220 still makes his enunciation WRONG ... nationality is NO excuse for not spending the ten seconds to learn how to say a wqord correctly ..... it is called education not indoctrination ... which is what the american system is ... an indoctrination into being better idiots ... everywhere else you generally get an education ... with some indoctrination ... the smart people just for the education and ignore the indoctrination until it rars it's ugly head in poor enunciation and shit spelling ....
The best explanation on the internet!
flawed though vsub 1 is only trivial until the engine has spooled up to self sustaining ... at which point v1 is NOT trivial and is mandatory ... so he imparts an extreme error into his calculations on the order of 20 times
What if the mass flow rate is unknown? How to compute it when the vehicle is not moving?
As the result is 117KN of thrust, how many power is in this air movement. By the formula P=Thrust x Velocity/2 we have 117000x783/2 = 46MW, like 500 car engines. As the fuel consumption is 80MW (from given 40x2MJ/s ) the efficiency is 58%.
Did you not forget the 2kg/s of fuel in your thrust calc?
The exit speed of 783m/s is supersonic, but by what value? By mach=1.7 or by mach=2.26? The value 1.7 is (as i see in other sites) if consider the sound speed related to the temperature of exit gas itself (sqr(1.4x287x526)=460m/s) , but is mach 2.26 if consider sound speed 340m/s as the engine is at ground level (300Kelvin ambient) as the table fighter-planes.com/jetmach1.htm .
so it enters the turban .... that would be a very long silk scarf worn about the head ... or did you mean turbine ... like wine it is a long i not a short i ... ENUNCIATION is key there is no long silk scarf head wrap inside a jet turbine engine ...
Vsub1 is only negligible until the engine has spooled up to sustaining operation ... at which point vsub1 is NOT trivial because the compressor is SUCKING air in above ambient air speed .... and as the plane begins to roll the ambient air speed increases as the plane moves faster ... therefore Vsub1 is never able to be considered trivial and MUST ALWAYS BE calculated in.
Thumbs up for Prof. Knutson
Thank you. Do you have any similar examples one for a ramjet running at Mach1
Great video. Thanks !
Try to keep the labels standard.. i.e. TET at T4 as opposed to T3 because this might get confusing to some students. Otherwise thanx man
ehrenmann❤
هل من مصل على النبي محمد صل الله عليه وسلم وبارك الصلاة الإبراهيمية
Its not turbin... Its turbine.
he's american
@@zerothcore3220 still makes his enunciation WRONG ... nationality is NO excuse for not spending the ten seconds to learn how to say a wqord correctly ..... it is called education not indoctrination ... which is what the american system is ... an indoctrination into being better idiots ... everywhere else you generally get an education ... with some indoctrination ... the smart people just for the education and ignore the indoctrination until it rars it's ugly head in poor enunciation and shit spelling ....
made me think he was trying to get a silk scarf on the engine or something ... it is not like this is a lawn mower engine with a pull start after all