PDF Publication Title:
Text from PDF Page: 127
Konstantinos G. Kyprianidis System uncertainty due to thermo-fluid modelling tends to give the illusion that the overall system calculation will not be affected much. In reality however, the error in the prediction of the compressor delivery temperature will affect significantly the accuracy of the fuel mass flow prediction - and therefore other important performance parameters such as Specific Fuel Consumption (SFC) and block fuel estimations. Furthermore, Kurzke [5] con- cludes that for achieving high temperatures one needs over-proportional amounts of fuel, and that is the reason for the maximum thermal efficiency being at a tem- perature much lower than the stoichiometric limit. The fact that fuel mass flow, and subsequently Fuel to Air Ratio (FAR), is not proportional to the combustor temperature increase can only be taken fully into account if rigorous fluid mod- elling is used in the combustor component calculations. Lee et al. [195] also come to similar conclusions for gas turbine configurations with multiple combustors. It can therefore be concluded that the fully rigorous approach should be used in all performance calculations, even within the educational procedure. 4.4 Computational time considerations Estimating the performance of a gas turbine engine at aircraft system level, for a long range mission, requires a relatively small amount of computing power. How- ever, the required computational time for design space exploration applications - through the use of multi-disciplinary tools such as TERA2020 - is not negli- gible and the fluid model must therefore be chosen carefully. Tables of caloric properties where seemingly found to be a good choice with respect to reducing computational speed. Computational speed decreased by some 10% if the Walsh and Fletcher 8th order polynomials were used and some 20% if CHEMKIN-II type of libraries of 4th order polynomials were used. For the latter choice, only five species were taken into account: N2, O2, Ar, H2O, and CO2. It can be ar- gued however, with high confidence, that these benchmarking results are highly dependent on programming practices and as a result on the quality of the code produced. A conclusion therefore cannot be drawn on whether using fluid prop- erties or polynomials is best practice with respect to computational speed. Nevertheless, following further analysis, it was safely concluded that when us- ing a CHEMKIN-II type of library (or equivalent) the computational speed is inversely proportional to the number of species taken into consideration. As a rule of thumb, doubling the number of species taken into consideration will 87PDF 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 |