Calculation characteristics of centrifugal compressor operates on a mixture of gases

A mathematical model of carbon dioxide isobaric flow under supercritical pressure in the condition of a constant heat flux on the surface of a cooled pipe is discussed. Criterion dependencies for heat transfer are analyzed. The effect of greatly variable heat capacity is shown. A method has been developed for taking this factor into account in numerical calculations. Areas are found with the so-called degraded heat transfer.

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Modeling heat transfer in a supercritical carbon dioxide flow with greatly variable thermophysical properties

Chirkov

Luo

Egorov

2019

J. Phys.: Conf. Ser.

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Thermophysical properties of noble gas mixtures with low Prandtl number

Egorov

Степанова

2019

EJSI

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The article investigates thermal (thermal conductivity and viscosity) and thermodynamic (density, heat capacity, enthalpy, compression coefficient) properties of inert gases and their mixtures, which are used as the main working medium in promising closed gas turbine for the space needs. Closed gas turbines can be used in various space applications – unmanned spacecrafts, communication satellites and manned martian mission. Experimental research into thermodynamic and thermophysical properties of noble gases and their mixtures is considered. It was revealed that by this time enough amounts of experimental data concerning the properties of both single inert gases and their mixtures had been obtained. These data are used in different models based on kinetic theory of gases and virial real gas condition equation which makes possible to predict necessary thermophysical parameters. While calculating and designing closed gas-turbine installations it is necessary to take into account adiabatic change and Prandtl number of inert gas mixtures. While approaching working parameters to xenon saturation line one should consider the increase of calculated dependency errors

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Calculation characteristics of centrifugal compressor operates on a mixture of gases

Cited by 2 publications

References 2 publications

Modeling heat transfer in a supercritical carbon dioxide flow with greatly variable thermophysical properties

Modeling heat transfer in a supercritical carbon dioxide flow with greatly variable thermophysical properties

Thermophysical properties of noble gas mixtures with low Prandtl number

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