PDF Publication Title:
Text from PDF Page: 188
Assessment of core technologies and concepts Konstantinos G. Kyprianidis significantly lower. This is a consequence of the ICAO LTO NOx legislative limits being quite strict for low OPR engines, while providing a better LTO NOx allowance for high OPR engines. Despite the generally low OPR, cruise NOx may still remain an important con- cern for an intercooled recuperated configuration, if lean-burn combustion tech- nology is not introduced. During cruise, the need for high heat exchange levels in the recuperator results in high combustor inlet temperatures and low AFR values; designing a conventional RQL technology combustor for such conditions could still prove a challenging task. To this extent, the intercooled recuperated concept essentially lends itself to lean-burn combustion technology. Due to the variable geometry LPT, the primary zone temperature during cruise will not be so far away from the take-off value when compared to conventional engine designs. It can therefore prove easier to balance the combustor primary zone design to achieve both low NOx and CO emissions at cruise conditions, as well as retain low NOx levels at high power conditions such as take-off. Substitut- ing the RQL combustor with a lean-burn design, can reduce NOx emissions but the effect would be less profound compared to lean-burn combustion technology coupled with high OPR cycles. Similarly, introducing a variable geometry LPT in an intercooled core with lean- burn combustion technology can improve LTO NOx and the margin from the ICAO CAEP/6 certification limit by nearly 10%, at a given level of cruise NOx. This involves running the intercooled core approximately 60 [K] hotter during cruise in order to achieve the same thrust levels. The reduction in LTO NOx levels is mainly the result of bringing the primary zone temperature during cruise closer to the take-off value; the latter results in the lean-burn combustor design - balanced for NOx and CO at cruise - retaining acceptable NOx levels at high power conditions such as ICAO 100% FN. Running the engine hotter at cruise also improves SFC by nearly 1%. It is worth noting that the effect of elevated cruise temperatures on HPT life, and consecutively on engine time between overhaul and maintenance costs is not profound, for the temperature increase proposed. The main reason behind this is that HPT life is dominated by the time spent at take-off and climb, with cruise effects being of secondary order due to the significantly lower operating temperatures encountered. Moreover, modulating T41 to remain constant at the higher cruise thrust range (i.e. flat temperature profile), could actually prove 148PDF Image | Multi-disciplinary conceptual design of future jet engine systems
PDF Search Title:
Multi-disciplinary conceptual design of future jet engine systemsOriginal File Name Searched:
thesis-future-jet-engines.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |