Thermodynamic Parameters of the Equation of State of Solids

1998 ◽  
Vol 210 (1) ◽  
pp. 61-73 ◽  
Author(s):  
Ajay Verma ◽  
M.P. Verma
Keyword(s):  
Equation Of State ◽  
Thermodynamic Parameters

Simple Predictions for the Sonic Conditions in a Real Gas

1977 ◽  
Vol 99 (1) ◽  
pp. 217-225 ◽  
Author(s):  
P. A. Thompson ◽  
D. A. Sullivan
Keyword(s):  
Equation Of State ◽  
Closed Form ◽  
Thermodynamic Parameters ◽  
Ideal Gas ◽  
Accurate Prediction ◽  
Bernoulli Equation ◽  
Real Gas ◽  
Similarity Principle ◽  
Isentropic Flow ◽  
The Ideal

The steady isentropic flow of a fluid which satisfies an arbitrary equation of state is treated, with emphasis on the prediction of pressure, density, velocity, and massflow at the sonic state. The isentrope P(v) is described by a limited number of thermodynamic parameters, the most important ones being the soundspeed c and fundamental derivative Γ. Using this description, an application of the Bernoulli equation and appropriate thermodynamic relations yields simple closed-form predictions for the sonic state. These predictions are recognizable as generalizations of well-known ideal gas formulas, but are applicable to fluids very far removed from the ideal gas state, even including liquids. Comparisons in several cases for which precise independent solutions are available suggest that the methods found here are accurate. A derived similarity principle allows the accurate prediction of sonic properties from any single given sonic property.

scholarly journals Численное моделирование термодинамических параметров высокопористой меди

2019 ◽  
Vol 89 (8) ◽  
pp. 1158
Author(s):  
К.К. Маевский ◽  
С.А. Кинеловский
Keyword(s):  
Experimental Data ◽  
Shock Wave ◽  
Equation Of State ◽  
Thermodynamic Parameters ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Thermodynamically Equilibrium ◽  
Consistent Equation ◽  
Modified Equation ◽  
Fitting Parameters

The modified equation of state is proposed for the calculation of thermodynamically equilibrium model TEС2 to improve the reliability of the description of thermodynamic parameters of shock-wave loading of pure materials and heterogeneous mixtures of different porosity. The parameters of the thermally consistent equation of state are determined for copper. A reliable description of the shock-wave loading of copper is obtained for a small number of fitting parameters determined by the experimental data. The thermodynamic parameters for copper of different porosity are modeled, the compression and temperature values along the shock adiabate are determined; the heat capacity value along the normal isobar is calculated. The results of calculations are compared with the known experimental results of different authors.

scholarly journals Development and Experimental Validation of Real Fluid Models for CFD Calculation of ORC and Steam Turbine Flows

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6879
Author(s):  
Andrii Rusanov ◽  
Roman Rusanov ◽  
Piotr Klonowicz ◽  
Piotr Lampart ◽  
Grzegorz Żywica ◽  
...  
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Steam Turbine ◽  
Thermodynamic Parameters ◽  
Equations Of State ◽  
Computational Cost ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Large Power ◽  
Wide Range

The article describes an interpolation–analytical method of reconstruction of the IAPWS-95 equations of state and the modified Benedict–Webb–Rubin equations of state with 32 terms (mBWR32). The method enables us to provide the thermodynamic closure in 3D computational fluid dynamics (CFD) calculations of turbomachinery flows with real working media, such as steam and Organic Rankine Cycle (ORC) fluids. The described approach allows for the sufficient accuracy of 3D flow calculations and does not require a significant increase in computational cost over perfect gas calculations. The method is validated against experimental data from measurements and compared with computational results from the model using the Tammann equation of state. Three turbine blading systems are considered—a multi-stage configuration from a low-pressure cylinder of a large-power steam turbine and two ORC microturbines working with organic media HFE7100 and R227ea. The calculation results obtained using the described method of approximation of the IAPWS-95 and mBWR32 equations exhibit satisfactory agreement with the experimental data, considering pressures, temperatures and enthalpies in key sections, as well as turbine power and efficiency in a wide range of changing thermodynamic parameters. In contrast, the Tammann equation of state provides acceptable results only for relatively small changes of thermodynamic parameters.

scholarly journals CALCULATION OF THERMODINAMIC PARAMETERS OF HYDROGEN ABSORPTION IN DIFFERENT SOLVENTS

2020 ◽  
pp. 41-51
Author(s):  
Антонина Анатольевна Степачёва ◽  
Мария Евгеньевна Маркова ◽  
Маргарита Александровна Монжаренко ◽  
Анастасия Алексеевна Дмитриева ◽  
Елена Олеговна Щипанская ◽  
...  
Keyword(s):  
Equation Of State ◽  
Thermodynamic Parameters ◽  
Hydrogen Absorption ◽  
Gas Absorption ◽  
Current Work ◽  
Process Conditions ◽  
Gas Solubility ◽  
Stirring Rate

В данной работе были проведены исследования растворимости водорода в различных растворителях. Было изучено влияние условий (температуры и давления, а также скорости перемешивания) на растворимость водорода в воде, пропаноле-2, н-гексане, толуоле и н-додекане. Было исследование влияние наличия катализатора на растворимость водорода. Расчет термодинамических параметров абсорбции водорода проводился с использованием уравнения состояния Соаве-Редлиха-Квонга. In the current work, the solubility of hydrogen in different solvents was studied. The influence of process conditions (temperature, pressure and stirring rate) on the hydrogen absorption in water, propanol-2, n-hexane, toluene and n-dodecane was estimated. The effect of the catalyst presence on the gas absorption was also investigated. The calculation of thermodynamic parameters of gas solubility in different solvent was done according to the Soave-Redlich-Kwong equation of state.

Sign in / Sign up

Export Citation Format

Share Document