Conveners
C2PoD - Gas and Fluid Mixtures
- Amir Jahromi (NASA/GSFC)
- Jacob Leachman (Washington State University)
Investigating cooling cycles operating with gas mixtures require the ability to evaluate the thermodynamic properties of mixtures, usually as a function of temperature, pressure, and composition. Working with mixed refrigerants for Joule-Thomson (JT) cryocoolers, it is desired to calculate the enthalpy of mixtures for determining their specific cooling power. Evaluating the mixture enthalpies...
Cryogenic adsorber is essential in large cryogenic engineering system due to the high quality gas demand, the design of the adsorber requires accurate adsorption data. A cryosorption setup has been built to investigate the cryogenic adsorption of helium and nitrogen on commercial PICA activated carbon, molecular simulation of helium and nitrogen on activated carbon is also studied based on...
For decades NASA has used helium to pressurize liquid hydrogen propellant tanks to maintain tank pressure and reduce boil-off. This process causes helium gas to dissolve into liquid hydrogen creating a cryogenic mixture with thermodynamic properties that vary from pure liquid hydrogen. Traditional NASA models have been unable to account for this dissolved helium due to a lack of fundamental...
Numerical study of cryogenic gas dispersion benefits for the risk reduction of leakage of hazard cryogenic gases. Up to now, phase change physics of small quantity of water involved in the cryogenic gas has not been considered in numerical modeling of the dynamic dispersion behaviors of cryogenic gas in the atmosphere. The present study develops a computational fluid dynamic (CFD) model...
