PDF Publication Title:
Text from PDF Page: 042
3. Optimization tool 3.1. Genetic Algorithms Genetic algorithms have been successfully applied for some time now to shape optimization in aeronautics [73][74][75][76]; in spite of their cost, they have proved their interest with respect to gradient-based methods because of their high flexibility (stemming from the fact they only require values of the objective function(s) to efficiently explore the parameters space in search of an optimum), and also because of their ability to find global optima of multi-modal problems. Moreover, so-called Pareto-type genetic algorithms are of particular interest for multi-objective optimization since they provide, after only a few generations, a set of non-dominated solutions. On the contrary, a conventional gradient- based method needs several independent runs to achieve similar results [76][77]. The MOGA (Multi-objective Genetic Algorithm) is also well suited to the solution of multi- objective problems, such as multi-point performance improvement for a lifting airfoil. The MOGA applied in this study is the Non-Dominated Sorting Algorithm (NGSA) proposed by Srinivas and Deb [78]. At a given generation number, all individuals in the population are ranked according to non-domination criteria that allow to take into account in a simultaneous way a set of objective functions. The set of individuals that dominate all the other members of the population without dominating each other is designated as front of rank 1; the set of dominant individuals in the population deprived from the members of rank 1 form the front of rank 2, and so forth until the whole population is classified into a series of dominance fronts. The individuals scattered along the front of rank 1 are assigned the same pseudo-fitness function, arbitrarily fixed to unity, since they are equally well- adapted and therefore should be given the same potential of reproduction. However, in order to favor the population diversity along the front, the pseudo-fitness value is decreased for individuals located in crowded areas of the front: practically, the initial uniform value of the pseudo-fitness function is divided by a number strictly larger than unity for individuals with neighbors within a prescribed distance. Next, the smallest value of the modified pseudo-fitness function obtained for individuals belonging to the front of rank 1 is decreased from a small number ε and assigned to all members of the front of rank 2; next this uniform value is then itself modified as previously explained in order to 41PDF Image | ANALYSIS AND OPTIMIZATION OF DENSE GAS FLOWS: APPLICATION TO ORGANIC RANKINE CYCLES TURBINES
PDF Search Title:
ANALYSIS AND OPTIMIZATION OF DENSE GAS FLOWS: APPLICATION TO ORGANIC RANKINE CYCLES TURBINESOriginal File Name Searched:
phd_thesis_PM_CONGEDO.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 |