GTRE Kaveri Engine

Gautam said:
The elusive "Ganga" engine. GTRE in the early 2010s began work to develop a turbofan with a higher bypass ratio than the Kaveri with the same Kabini core. The proposed engine was called the "Ganga" & was supposed to be as powerful as the Su-30MKI's Al-31FP. The project was never mentioned by MoD in any of its publications as an ongoing program. From what I can tell GTRE used some of their internal funds for the project. Though I am not sure how they can afford to issue tenders & acquire new fans without a separate budget for this program. May be it was approved after all, who knows.

This is not the same fan as the current distortion tolerant fan one on the dry Kaveri. This is a different fan, an upgraded version of the original 78 kg/s fan.

Here is a photo of the fan:
View attachment 21763
Notice how the fan's bearing mounts have gone behind the 1st stage of the fan. The nose is significantly larger & the fan did have BLISK. The fan was manufactured by Kalyani/Bharat Forge. They were one of the few Indian companies that could do aerospace grade manufacturing of Titanium alloys with micron level tolerances. Titanium alloys are notoriously difficult to machine.

There are reasons to believe that this tender is the reason that Bharat Forge decided to make their own engines. This tender proved their capabilities to both DRDO-GTRE & to themselves.

That's not a big problem. They have designed 4-5 fans so far. They can do so again.
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Any reason why new fan is not having BLISK seems like it is the only milestone left after SCB and TBC.
 
Chain Smoker said:
Any reason why new fan is not having BLISK
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It is not a necessity yet. Of course we can better performance with it. But the addition of BLISK will slowdown manufacturing. It can be brought in when we can 3D print with that level of precision.
Chain Smoker said:
seems like it is the only milestone left after SCB and TBC.
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There are generations & tech improvements to be made in each of these. BLISKs have generations based on distortion tolerance, anti-freezing capability, pressure recovery, surge margin et al.
 
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Gautam said:
It is not a necessity yet. Of course we can better performance with it. But the addition of BLISK will slowdown manufacturing. It can be brought in when we can 3D print with that level of precision.

There are generations & tech improvements to be made in each of these. BLISKs have generations based on distortion tolerance, anti-freezing capability, pressure recovery, surge margin et al.
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Can the K11 replace 404 in all Mk1 and Mk1as during their mid life upgrade?
 
AbRaj said:
Looks small for Kaweri engine.
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Its a later stage for compressor section. The air has been squeezed to a much smaller volume at this point...so to maintain uniform velocity (across the compressor) one has to reduce the flow area.

There is a good cutaway of F414 here to see what I mean:


1636488469256.png
 
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DEVELOPMENT OF KAVERI ENGINE
Posted On: 29 NOV 2021 2:58PM by PIB Delhi


Cabinet Committee on Security (CCS) sanctioned Kaveri Engine project in 1989. The following milestones were achieved:

· 9 Full prototype engines and 4 core engines built

· 3217 hours of engine testing conducted

· Completed Altitude tests & Flying Test Bed (FTB) trials. This is the first time that an indigenously developed military gas turbine engine was flight tested

Kaveri engine project has achieved higher Technology Readiness Level (TRL) in many critical technology domains and those technologies are being used in the various engine development programmes of the country. Further the engines are used as test vehicles for validating next generation technologies.

Funds details are as follows:

Funds allocated

Expenditure

Commitment

Rs. 2105 crore

Rs. 2035.56 crore

Rs. 2097.65 crore

At present, the LCA Tejas is integrated with an imported engine. However, in future, it is proposed to develop indigenous engines for powering our own aircrafts such as LCA variants and AMCA in association with an International Engine House. The technological capabilities built through the Kaveri engine project will be utilised.

LCA Tejas, Flight Operational Clearance (FOC) configuration demands higher thrust than the intended engine requirement. Hence the Kaveri in the present architecture cannot be integrated. In order to induct with LCA Tejas, a modified engine version is required.

This information was given by Raksha Rajya Mantri Shri Ajay Bhatt in a written reply to Shri M. Mohamed Abdulla in Rajya Sabha today.

********

ABB/DK/Savvy
 
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Gautam said:
The elusive "Ganga" engine. GTRE in the early 2010s began work to develop a turbofan with a higher bypass ratio than the Kaveri with the same Kabini core. The proposed engine was called the "Ganga" & was supposed to be as powerful as the Su-30MKI's Al-31FP. The project was never mentioned by MoD in any of its publications as an ongoing program. From what I can tell GTRE used some of their internal funds for the project. Though I am not sure how they can afford to issue tenders & acquire new fans without a separate budget for this program. May be it was approved after all, who knows.

This is not the same fan as the current distortion tolerant fan one on the dry Kaveri. This is a different fan, an upgraded version of the original 78 kg/s fan.

Here is a photo of the fan:
View attachment 21763
Notice how the fan's bearing mounts have gone behind the 1st stage of the fan. The nose is significantly larger & the fan did have BLISK. The fan was manufactured by Kalyani/Bharat Forge. They were one of the few Indian companies that could do aerospace grade manufacturing of Titanium alloys with micron level tolerances. Titanium alloys are notoriously difficult to machine.

There are reasons to believe that this tender is the reason that Bharat Forge decided to make their own engines. This tender proved their capabilities to both DRDO-GTRE & to themselves.

That's not a big problem. They have designed 4-5 fans so far. They can do so again.
Click to expand...
Did u noticed diameter its 820mm (32.2inch) now question is How such a small inlet can have such huge mass flow.
 
Chain Smoker said:
Did u noticed diameter its 820mm (32.2inch) now question is How such a small inlet can have such huge mass flow.
Click to expand...

Problem arises when you try to chose what type of air inlet is required for optimum thrust when you install the engine in the aircraft, which should also produce optimum thrust at various AOA. Just wait and watch what happens next :p
 
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