PDF Publication Title:
Text from PDF Page: 010
P. Colonna, S. Rebay, J. Harinck and A. Guardone higher sound speed is compensated by a velocity magnitude that is similarly higher, as is shown in Fig. 4(b). The figure shows the percentage difference of velocity magnitude for the PIG EoS with respect to the SW EoS. As the difference in sound speed decreases (Fig. 3(c)), the difference in velocity magnitude also decreases (Fig. 4(b)), thus limiting the relative difference in the Mach number (Fig. 4(c)) to a maximum of 6% further downstream. This leads to an Mach number distribution that, even in relative terms, does not differ as much between EoS models as the sound speed and the velocity magnitude. As stated above, one of the main peculiarities of dense vapor flows of complex molecules is the variation of the speed of sound with density. The fundamental derivative, denoted by Γ, is the parameter that, if negative, indicates the possible occurrence of the so-called nonclassical gasdynamic behavior.20,21,19 It is defined as: (6) Γ≡1−c ∂v s v ∂c Here, v is the specific volume and s is the entropy. Fluids which have Γ < 0 over a finite range of pressures and temperatures in the single-phase regime are referred to as Bethe- Zel’dovich-Thompson (BZT) fluids after the authors who first recognized the importance of (6). The molecules of these fluids have a high number of degrees of freedom, which is often the case for fluids that have a high molecular weight. Their molecular complexity enables them to exhibit nonclassical fluid dynamic behavior such as expansion shocks and compression fans.19 For the less stringent condition Γ < 1, the isentropic relation between sound speed and temperature is inverted with respect to the ideal gas behavior: the sound speed increases across an isentropic expansion and decreases across an isentropic compression. Fig. 3(d) shows the distribution of the fundamental derivative. The results for the SW EoS show that the entire expansion process occurs at Γ < 1, which is in accordance with the increase in sound speed observed in Fig. 3(c) for the PRSV and SW models. Initially, its value is Γ = 0.56 (SW) and Γ = 0.59 (PRSV) and it increases to Γ = 0.67. With respect to the SW model, PRSV model predicts a 5% higher Γ at the leading edge. Although MDM can be considered a molecularly complex fluid (0 < Γ < 1 in this expansion process), nonclassical fluid dynamic behavior is not possible as it is known that MDM is not a BZT fluid, i.e., Γ > 0.10 The PIG EoS incorrectly predicts a value of 1.0087, since it is known20 that for ideal gas (6) reduces to Γ = 1/2(γ + 1). The distribution of the pressure coefficient defined as CP = P01 − P , (7) P01 − P2 where P01 is the total inlet pressure and P2 the static outflow pressure, is shown in Fig.3(b). Its trend is similar to the one of the Mach number. Note that the same pressure values are prescribed at the inflow and outflow boundary for all EoS. 10PDF Image | REAL-GAS EFFECTS IN ORC TURBINE FLOW SIMULATIONS
PDF Search Title:
REAL-GAS EFFECTS IN ORC TURBINE FLOW SIMULATIONSOriginal File Name Searched:
Colonna.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 |