Calculation of air properties
Calculates a variety of air thermodynamic properties from the measured temperature, pressure, and humidity.
Variables able to calculated:
rho - [kg m^-3] - Density
mu - [N s m^-2] - Dynamic viscosity
k - [W m^-1 K^-1] - Thermal conductivity
c_p - [J kg^-1 K^-1] - Specific heat capacity (constant pressure)
c_v - [J kg^-1 K^-1] - Specific heat capacity (constant volume)
gamma - [1] - Ratio of specific heats
c - [m s^-1] - Speed of sound: c = (gamma*R*T/M)^0.5
nu - [m^2 s^-1] - Kinematic viscosity: nu = mu/rho
alpha - [m^2 s^-1] - Thermal diffusivity: alpha = k/(rho*c_p)
Pr - [1] - Prandtl number: Pr = mu*c_p/k
M - [kg mol^-1] - Molar mass of humid air
R - [J kg^-1 K^-1] - Specific gas constant
h - [%] - Relative humidity (if dew point inputted)
Calculations are based around atmospheric temperatures and pressures, i.e. not for the use of high temperature combustion. See references for details and limitations.
References:
Picard, A, Davis, RS, Glaser, M, Fujii, K, 2008, 'Revised formula for the density of moist air (CIPM-2007)', Metrologia, vol. 45, no. 2, pp. 149-155. DOI: http://dx.doi.org/10.1088/0026-1394/45/2/004
Tsilingiris, P, 2008, 'Thermophysical and transport properties of humid air at temperature range between 0 and 100°C', Energy Conversion and Management, vol. 49, no. 5, pp.1098-1110. DOI: https://doi.org/10.1016/j.enconman.2007.09.015
Citar como
SFitz (2024). Calculation of air properties (https://github.com/sjfitz/AirProperties/releases/tag/v2.0.1), GitHub. Recuperado .
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- Mathematics and Optimization > Symbolic Math Toolbox > Mathematics > Calculus >
- Engineering > Mechanical Engineering > Combustion and Turbomachinery >
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Versión | Publicado | Notas de la versión | |
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2.0.1 | See release notes for this release on GitHub: https://github.com/sjfitz/AirProperties/releases/tag/v2.0.1 |
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2.0.0.1 | Minor changes |
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2.0.0.0 | Updated to include calculation of further properties. |
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1.0.0.0 |