Simulation of equilibrium states of thermodynamic systems using IVTANTERMO for Windows

Белов, Г. П.; Iorish, V. S.; Yungman, V. S.

doi:10.1007/bf02755944

Cited by 57 publications

(12 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Differences in the cases of helium and argon are investigated using equilibrium plasma composition as a function of temperature in the range 2000-4000 K. As a matter of fact just in this range the precursor turns into molecular hydrogen and condensed phase of carbon, identified in the database IVTANTERMO [36] as graphite. Modeling of the plasma flow in the reactor is made using quasi-one-dimensional approach under the local thermodynamic equilibrium [28,[37][38][39].…”

Section: Resultsmentioning

confidence: 99%

Distinctive Features of Graphene Synthesized in a Plasma Jet Created by a DC Plasma Torch

Shavelkina¹,

Иванов²,

Bocharov³

et al. 2020

Materials

View full text Add to dashboard Cite

Synthesis of graphene materials in a plasma stream from an up to 40 kW direct current (DC) plasma torch is investigated. These materials are created by means of the conversion of hydrocarbons under the pressure 350–710 Torr without using catalysts, without additional processes of inter-substrate transfer and the elimination of impurities. Helium and argon are used as plasma-forming gas, propane, butane, methane, and acetylene are used as carbon precursors. Electron microscopy and Raman imaging show that synthesis products represent an assembly of flakes varying in the thickness and the level of deformity. An occurrence of hydrogen in the graphene flakes is discovered by X-ray photoelectron spectroscopy, thermal analysis, and express-gravimetry. Its quantity depends on the type of carrier gas. Quasi-one-dimensional approach under the local thermodynamic equilibrium was used to investigate the evolution of the composition of helium and argon plasma jets with hydrocarbon addition. Hydrogen atoms appear in the hydrogen-rich argon jet under higher temperature. This shows that solid particles live longer in the hydrogen-rich environment compared with the helium case providing some enlargement of graphene with less hydrogen in its structure. In conclusion, graphene in flakes appears because of the volumetric synthesis in the hydrogen environment. The most promising directions of the practical use of graphеne flakes are apparently related to structural ceramics.

show abstract

Section: Resultsmentioning

confidence: 99%

Distinctive Features of Graphene Synthesized in a Plasma Jet Created by a DC Plasma Torch

Shavelkina¹,

Иванов²,

Bocharov³

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…The method of sequential equilibration of reactions using the minimization of Gibbs potential was used. Properties of individual substances were from the IVTANTHERMO database [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Graphene Flakes for Electronic Applications: DC Plasma Jet-Assisted Synthesis

et al. 2020

View full text Add to dashboard Cite

The possibility of graphene synthesis (the bottom-up approach) in plasma and the effective control of the morphology and electrical properties of graphene-based layers were demonstrated. Graphene flakes were grown in a plasma jet generated by a direct current plasma torch with helium and argon as the plasma-forming gases. In the case of argon plasma, the synthesized graphene flakes were relatively thick (2–6 nm) and non-conductive. In helium plasma, for the first time, graphene with a predominance of monolayer flakes and high conductivity was grown in a significant amount using an industrial plasma torch. One-dimensional (1D) flow modeling shows that the helium plasma is a less charged environment providing the formation of thinner graphene flakes with low defect density. These flakes might be used for a water-based suspension of the graphene with PEDOT:PSS (poly(3,4-ethylenedioxythiophene): polystyrene sulfonate) composite to create the structures employing the 2D printing technologies. Good structural quality, low layer resistance, and good mechanical strength combined with the ability to obtain a large amount of the graphene powder, and to control the parameters of the synthesized particles make this material promising for various applications and, above all, for sensors and other devices for flexible electronics and the Internet of things ecosystem.

show abstract

“…Н. Э. Баумана) [13], ИВТАНТЕРМО (В. С. Иориш, Термоцентр им. В. П. Глушко) [2], NASA Chemical Equilibrium with Applications (NASA CEA) (S. Gordon, Sanford Gordon and Associates, B. J. McBride, NASA Lewis Research Center) [17,20], позволяющие учитывать эффекты конденсированной фазы, ионов и электронного газа при расчете свойств продуктов сгорания или плазмы произвольного химического состава. Программы NASA CEA и АСТРА (TERRA) свободно распространяются со стандартной библиотекой и исходным кодом.…”

Section: Introductionunclassified

Comparative analysis of turboshaft engines thermodynamic cycles calculation

Aksyonov¹,

Puldas

2022

TSU Herald. Phys Math Model. Oil, Gas, Energy

View full text Add to dashboard Cite

A brief overview of domestic and foreign programs for calculating the thermodynamic cycle of the gas turbine engine operation is provided. The focus is on comparing GasTurb and Tyumen Motor Builders methods. Configuration files are provided for NASA Chemical Equilibrium with Applications program to calculate the thermodynamic properties of methane, air, and combustion products. The main provisions of the procedure for calculating thermal schemes of turboshaft engines are presented. Using the example of a three-shaft ship-type gas turbine engine UGT 15000, the potentials for increasing efficiency by 4-7% (abs.) and reducing CO2 emissions by 20% are shown due to the installation of an intercooler during compression of the working fluid. According to the results of comparison of GasTurb and Tyumen Motor Builders programs, the correspondence of the main parameters within the permissible measurement error is established. Based on published data on UGT 15000 (DG90), the parameters of the thermodynamic cycle were identified, including the polytropical efficiency of each node and cooling rates (ISO 2314). It has been shown that due to the isotermo-adiabatic cycle of V. V. Uvarov, already in the first approximation, without extreme parameters of the thermodynamic cycle, the characteristics of the V generation of the gas turbine engine can be implemented based on affordable and economical technologies of the II-IV generation (using equiaxed nickel superalloys, cyclone or convective-film cooling of high-pressure turbine vanes and blades). The Tyumen Motor Builders methodology program is open-source and has proven itself positively in the service-pack development for engines DG90/DN80/DU80 (III-IV generation) and the new ТМ16М2 engine construction.

show abstract

Simulation of equilibrium states of thermodynamic systems using IVTANTERMO for Windows

Cited by 57 publications

References 5 publications

Distinctive Features of Graphene Synthesized in a Plasma Jet Created by a DC Plasma Torch

Distinctive Features of Graphene Synthesized in a Plasma Jet Created by a DC Plasma Torch

Graphene Flakes for Electronic Applications: DC Plasma Jet-Assisted Synthesis

Comparative analysis of turboshaft engines thermodynamic cycles calculation

Contact Info

Product

Resources

About