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
Zitieren als
SFitz (2024). Calculation of air properties (https://github.com/sjfitz/AirProperties/releases/tag/v2.0.1), GitHub. Abgerufen .
Kompatibilität der MATLAB-Version
Plattform-Kompatibilität
Windows macOS LinuxKategorien
- Mathematics and Optimization > Symbolic Math Toolbox > Mathematics > Calculus >
- Engineering > Mechanical Engineering > Combustion and Turbomachinery >
Tags
Quellenangaben
Inspiriert: Formula SAE Brake Heat Transfer Model
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!Live Editor erkunden
Erstellen Sie Skripte mit Code, Ausgabe und formatiertem Text in einem einzigen ausführbaren Dokument.
Version | Veröffentlicht | Versionshinweise | |
---|---|---|---|
2.0.1 | See release notes for this release on GitHub: https://github.com/sjfitz/AirProperties/releases/tag/v2.0.1 |
||
2.0.0.1 | Minor changes |
||
2.0.0.0 | Updated to include calculation of further properties. |
||
1.0.0.0 |