Kaveri Engine

[ersakthivel]

Obviously, BPR of F404 with 0.27 is lower then Kaveri with 0.16.
http://www.homeschoolmath.net/teaching/d/compare-decimals.php

This is a complete lesson with instruction and varied exercises about comparing decimals with 1 or 2 decimal digits. A student with a common misconception will say that 0.16 is more than 0.4, thinking of the decimal digits as "plain numbers." We can use place value charts to combat this misconception.

Mate , How come 0.27 lesser than 0.16,

I did just BE Mech , In case you are a PhD in Math please explain,

thanks,

SO which is bigger, 0.99 or 0.09?

If you win a lottery & govt gives you 4 options of tax rates on your prize money , 0.27, 0.16, 0.99, .09

Which tax rate you will prefer?

By your logic 0.99 is the smallest it seems,

SO you will be ready to pay 0.99 of your tax money as the "smallest possible amount" to govt,

Please consult your Auditor,
Regards,

 

[ersakthivel]

Boss he is right

.27 is less than .16

.27 is twentyseventh part
And
.16 us sixteenth part

Eg

Divide 1 by 27 and then divide 1 by 16

Compare the answers you will understand

Mate, I didn't expect this from you,

Please remove your blind hatred for Modi & stop following the fools of AAP,

otherwise you will fall into the laps of foreign powers(exactly like FRCA -funded NGO heads of AAP ) ,

You are too good a guy to be lost like this , shape up!!

 

[Chinmoy]

@PaliwalWarrior , sorry bro.......... but I was wrong. I had taken it as a simple mathematics problem rather then going into details.

Kaveri has a bypass ratio of 0.16 or we could say that BPR of Kaveri is 0.16:1 i.e., for every 1 kg of air passing through the core, 160 gms of air is passing around the core and F404 with BPR of 0.27 means for every 1 kg of air through its core 270 gms of air passes around the core.

 

[airtel]

kaise kaise bevkoof bharein hain .................
0.27 is less than 0.16 ??
PaliwalWarrior & Chinmoy please go & kill your maths teachers .

 

[Indx TechStyle]

kaise kaise bevkoof bharein hain .................
0.27 is less than 0.16 ??
PaliwalWarrior & Chinmoy please go & kill your maths teachers .

Akal ka dushman toh tu hai.
0.27>0.16
I think you've already murdered your maths lecturer.

 

[ersakthivel]

@PaliwalWarrior , sorry bro.......... but I was wrong. I had taken it as a simple mathematics problem rather then going into details.

Kaveri has a bypass ratio of 0.16 or we could say that BPR of Kaveri is 0.16:1 i.e., for every 1 kg of air passing through the core, 160 gms of air is passing around the core and F404 with BPR of 0.27 means for every 1 kg of air through its core 270 gms of air passes around the core.

This is even more deadly!!!!


Stop this please, You dont know anything on maths , jet engine!!!

Explain how many grams of air fly into which ever part of jet engines you may fancy & regale us with your jet engine maths!!!

Please get out of this grocery shop weighing mentality & read up something serious on jet engines before fooling people here again!!!

In this Google era it is insane to post stuff like this,

"The bypass ratio (BPR) of a turbofan engineis the ratio between the mass flow rate of air drawn through the fan disk that bypasses theengine core (un-combusted air) to the mass flow rate passing through the engine core."

In plain English it means that in low bypass ratio engines a higher percentage of the air that goes through the frontal fan disk is pushed through high pressure jet turbine blades,

In high bypass ratio engine, a lower percentage of the air that passes through the fan disk is pushed through high pressure jet turbine blades(core) ,

jet engines with very high bypass ratio work like propeller, i.e most of the thrust is derived from the fan action of the frontal fan disk , exactly like in older air screw powered planes

So in reality you are once again making things stand on their head !!

So after 80s jet engines branched into two different categories,

High bypass ratio jet engines with bypass around 8 & above were used for passenger planes ,

with most of the power derived from air screw propeller action

& a lesser portion from jet turbine thrust leading to higher fuel efficiency & lower throttle response, because most of the air doesn't pass through the jet turbine core , it is not possible to suddenly increase the fuel & transfer the combustion thermal energy into non core air flow,

Conversely military jet engines have low bypass below 0.5 or so

It enabled most of the fan sucked air to pas through jet core, so lower fuel efficiency & higher throttle response, since combusting extra fuel inside the core & after burner wil lead to higher thermal energy transfer on the very high percentage of air that passes through the core,

Kaveri is a step ahead actually, it can alter this bypass ratio for specific conditions like high temp, humid or low temp dry climatic condition & for take offs & close combat.

Also it improves fuel efficiency plus gives extra thrust with in shorter span of time with and a better throttle response which transfers into higher turn rates in close combat

 

[Chinmoy]

Stop this please, You dont know anything on maths , jet engine!!!

"The bypass ratio (BPR) of a turbofan engineis the ratio between the mass flow rate of air drawn through the fan disk that bypasses theengine core (un-combusted air) to the mass flow rate passing through the engine core."

Explain how many grams of air fly into which ever part of jet engines you may fancy & regale us with your jet engine maths!!!

Please get out of this grocery shop weighing mentality & read up something serious on jet engines before fooling people here again!!!

In this Google era it is insane to post stuff like this,

My dear @ersakthivel ......... i do respect your thoughts a lot. But could you define these points?

The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of air drawn through the fan disk that bypasses the engine core (un-combusted air) to the mass flow rate passing through the engine core. For example, a 10:1 bypass ratio means that 10 kg of air passes around the core for every 1 kg of air passing through the core.


Engineno Major applications Bypass ratio

Rolls-Royce/Snecma Olympus 593 (turbojet) Concorde 0:1

SNECMA M88 Rafale 0.30:1

General Electric F404 F/A-18, T-50, F-117, X-29, X-31 0.34:1

Pratt & Whitney F100 F-16, F-15 0.36:1

Eurojet EJ200 Typhoon 0.4:1

Klimov RD-33 MiG-29, Il-102 0.49:1

Saturn AL-31 Su-27, Su-30, J-10 0.59:1

NK-144A Tu-144 0.6:1

Pratt & Whitney JT8D DC-9, MD-80, 727, 737 0.96:1

D-20P Tu-124 1.0:1

Kuznetsov NK-321 Tu-160 1.4:1

Rolls-Royce Tay Gulfstream IV, F70, F100 3.1:1

CF6-50 A300, DC-10-30 4.26:1

PowerJet SaM146 SJ 100 4.43:1

RB211-22B Lockheed L-1011 TriStar 4.8:1

PW4000(-94) A300, A310, Boeing 767, Boeing 747-400 4.85:1

Progress D-436 Yak-42, Be-200, An-148 4.91:1

CF6-80C2 A300-600, Boeing 747-400, MD-11, A310 4.97-5.31:1

Trent 700 A330 5.0:1

Pratt & Whitney JT9D Boeing 747, Boeing 767, Airbus A310,
McDonnell Douglas DC-10 5.0:1

Progress D-18T An-124, An-225 5.6:1

Pratt & Whitney PW2000 757, C-17 5.9:1

General Electric TF39 Lockheed C-5 Galaxy 8.0:1

Rolls-Royce Trent 900 A380 8.7:1

General Electric GE90 777 8.4-9:1

Rolls-Royce Trent XWB A350 9.3:1

General Electric GEnx 747-8, 787 9.6:1

Rolls-Royce Trent 1000 787 10:1

Pratt & Whitney PW1000G Bombardier CSeries, Airbus A320neo 12:1

PT6 / PW100 (turboprop)[2] Beechcraft Super King Air / ATR 72 50-60:1

https://en.wikipedia.org/wiki/Bypass_ratio
Now along with being B.E in mech, I am sure you are good in English too. In my post I've nowhere written that 1kg of air does pass through the core. I have just given the relation, that for every 1 kg of air passing through the core, 160 gms of air pass around the core. Hope its not so difficult to understand.

 

[ersakthivel]

My dear @ersakthivel ......... i do respect your thoughts a lot. But could you define these points?

The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of air drawn through the fan disk that bypasses the engine core (un-combusted air) to the mass flow rate passing through the engine core. For example, a 10:1 bypass ratio means that 10 kg of air passes around the core for every 1 kg of air passing through the core.


Engineno Major applications Bypass ratio

Rolls-Royce/Snecma Olympus 593 (turbojet) Concorde 0:1

SNECMA M88 Rafale 0.30:1

General Electric F404 F/A-18, T-50, F-117, X-29, X-31 0.34:1

Pratt & Whitney F100 F-16, F-15 0.36:1

Eurojet EJ200 Typhoon 0.4:1

Klimov RD-33 MiG-29, Il-102 0.49:1

Saturn AL-31 Su-27, Su-30, J-10 0.59:1

NK-144A Tu-144 0.6:1

Pratt & Whitney JT8D DC-9, MD-80, 727, 737 0.96:1

D-20P Tu-124 1.0:1

Kuznetsov NK-321 Tu-160 1.4:1

Rolls-Royce Tay Gulfstream IV, F70, F100 3.1:1

CF6-50 A300, DC-10-30 4.26:1

PowerJet SaM146 SJ 100 4.43:1

RB211-22B Lockheed L-1011 TriStar 4.8:1

PW4000(-94) A300, A310, Boeing 767, Boeing 747-400 4.85:1

Progress D-436 Yak-42, Be-200, An-148 4.91:1

CF6-80C2 A300-600, Boeing 747-400, MD-11, A310 4.97-5.31:1

Trent 700 A330 5.0:1

Pratt & Whitney JT9D Boeing 747, Boeing 767, Airbus A310,
McDonnell Douglas DC-10 5.0:1

Progress D-18T An-124, An-225 5.6:1

Pratt & Whitney PW2000 757, C-17 5.9:1

General Electric TF39 Lockheed C-5 Galaxy 8.0:1

Rolls-Royce Trent 900 A380 8.7:1

General Electric GE90 777 8.4-9:1

Rolls-Royce Trent XWB A350 9.3:1

General Electric GEnx 747-8, 787 9.6:1

Rolls-Royce Trent 1000 787 10:1

Pratt & Whitney PW1000G Bombardier CSeries, Airbus A320neo 12:1

PT6 / PW100 (turboprop)[2] Beechcraft Super King Air / ATR 72 50-60:1

https://en.wikipedia.org/wiki/Bypass_ratio
Now along with being B.E in mech, I am sure you are good in English too. In my post I've nowhere written that 1kg of air does pass through the core. I have just given the relation, that for every 1 kg of air passing through the core, 160 gms of air pass around the core. Hope its not so difficult to understand.

Till yesterday I thought I knew some English, but this beats me,

"that for every 1 kg of air passing through the core, 160 gms of air pass around the core. Hope its not so difficult to understand."

What nonsense is this???



You still fail to understand in low bypass ratio engines

by pass ratio= air that flows around the core(not through the core)/ air that flows through the core

So in low bypass ratio engines say 0.16 = 160grms/1000 grms

that is for every 160 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

1000 grms of air passes through the core.


in high bypass ratio engines

by pass ratio= air that flows around the core(not through the core)/ air that flows through the core

So in high bypass ratio engines say 6.25 = 1000grms/160 grms

that is for every 1000 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

160 grms of air passes through the core.

But you are explaining things in reverse.

got it?

 

[Kyubi]

Till yesterday I thought I knew some English, but this beats me,

"that for every 1 kg of air passing through the core, 160 gms of air pass around the core. Hope its not so difficult to understand."

What nonsense is this???



You still fail to understand in low bypass ratio engines

by pass ratio= air that flows around the core(not through the core)/ air that flows through the core

So in low bypass ratio engines say 0.16 = 160grms/1000 grms

that is for every 160 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

1000 grms of air passes through the core.


in high bypass ratio engines

by pass ratio= air that flows around the core(not through the core)/ air that flows through the core

So in high bypass ratio engines say 6.25 = 1000grms/160 grms

that is for every 1000 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

160 grms of air passes through the core.

But you are explaining things in reverse.

got it?

May be the following should make it more clear
https://www.grc.nasa.gov/www/k-12/airplane/turbfan.html

Sent from my XT1068 using Tapatalk

 

[Chinmoy]

Till yesterday I thought I knew some English, but this beats me,

"that for every 1 kg of air passing through the core, 160 gms of air pass around the core. Hope its not so difficult to understand."

What nonsense is this???



You still fail to understand in low bypass ratio engines

by pass ratio= air that flows around the core(not through the core)/ air that flows through the core

So in low bypass ratio engines say 0.16 = 160grms/1000 grms

that is for every 160 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

1000 grms of air passes through the core.


in high bypass ratio engines

by pass ratio= air that flows around the core(not through the core)/ air that flows through the core

So in high bypass ratio engines say 6.25 = 1000grms/160 grms

that is for every 1000 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

160 grms of air passes through the core.

But you are explaining things in reverse.

got it?

I think we are arguing in vain on this................ I'd like to quote myself here.

"that for every 1 kg of air passing through the core, 160 gms of air pass around the core

Now if I quote you............

that is for every 160 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

1000 grms of air passes through the core.

Again self quoting.......

that for every 1 kg of air passing through the core, 160 gms of air pass around the core

Quoting you again...............

that is for every 160 grams of air that flows around the core( not through the core & through the cylindrical channel around the cover of the jet engine core)

1000 grms of air passes through the core.

We are talking the same thing I hope.

 

[PaliwalWarrior]

Dude... Seriously???

Didn't know that there are so many in a single thread who couldn't count.

.27 is not 1/27.. It is 27/100

We are not talking negative numbers here.

Even by your parts logic, how is 27 parts less than 16 parts.

When in doubt, detach the sign, divide first number by second and attach back the sign. Do it the other way as well. You will know which one is bigger without straining much of our brains..

On a lighter note, now I know the reason why Chinese propaganda posters are having a field day [emoji12] [emoji12]

Sent from my 6045I using Tapatalk

Maybe mixed it up in a hurry.............
..

 

[PaliwalWarrior]

Mate, I didn't expect this from you,

Please remove your blind hatred for Modi & stop following the fools of AAP,

otherwise you will fall into the laps of foreign powers(exactly like FRCA -funded NGO heads of AAP ) ,

You are too good a guy to be lost like this , shape up!!

OK

Maybe mixed it up in a hurry

My mistake

 

[Kyubi]

I think we are arguing in vain on this................ I'd like to quote myself here.

Now if I quote you............

Again self quoting.......

Quoting you again...............


We are talking the same thing I hope.

@ersakthvel is trying make the distinction between HBPR and LBPR in terms of ratio and @Chinmoy you are concluding that both r the same ...

Maybe mixed it up in a hurry.............
..

Sent from my XT1068 using Tapatalk

 

[kstriya]

Kaveri engine successor soon ?

Published July 24, 2016


SOURCE: IDRW NEWS NETWORK



Section of Indian media reports is claiming that Government of India will soon announce the successor of Kaveri engine program by the end of this year . The proposed new engine will be used to power LCA-Tejas MK-1A in next three years, Government is also likely to clear fresh investment of Rs 2,600 crore to develop the successor engine which will still incorporate many of the technologies already developed for Kaveri engine, to shorten its development time .

It is not clear if French Rafale offset offer to help India develop turbofan engine with 90kN thrust class will be accepted by Indian defence ministry but after reviewing and holding discussions with all stakeholders Defence Minister Manohar Parrikar is likely to take call said a well-informed source close to idrw.org .

Kaveri engine was delinked from LCA-Tejas program a few years back and last year Kaveri engine program was officially closed but a year ago, idrw.org had highlighted in a report that GTRE, in fact, had issued a new tender asking reputed Indian private / public sector industries / organisations for manufacturing and assembly of 80 kN thrust class engine consisting about 20000 number of components and parts.

Kaveri engine is twin spool turbofan engine with Max thrust with afterburner of 81kN (8260kg) . The engine incorporates flat rated characteristics to pre-empt and manage thrust drop due to high ambient intake temperature and dusty weather conditions usually found in India.

NOTE : Article cannot be reproduced without written permission and Direct Citation to Article link or mention of idrw.org or IDRW NEWS NETWORK has to be mentioned

 

[PaliwalWarrior]

Gayi brains paaani me.

If this does not materials tejas mk1a will be delayed

 

[PaliwalWarrior]

Becuase it means orders for more engines from ge may not be placed

 

[Kunal Biswas]

IDRW news, Always creating facts out of speculations ..

 

[samir late]

Hi, I'm new here..
Just a small question.
Can't we use this engine for any other type of aircraft? i.e utility, transport, etc.

 

[airtel]

Hi, I'm new here..
Just a small question.
Can't we use this engine for any other type of aircraft? i.e utility, transport, etc.

yes , Engines based on kaveri can be can be used in other type of aircrafts too ......

not only aircrafts but naval ships & railways too , Infact Indian Railways & Indian navy are using kaveri based engines .

http://articles.economictimes.india...ngine-gas-turbine-research-establishment-gtre

http://www.indiastrategic.in/topstories257.htm



DRDO Aura will use a non afterburner variant of kaveri engine .

 

[samir late]

Wow! That's nice to hear...
But what about in aviation industry?