The differences between ideal gas and real gas
![The differences between ideal gas and real gas model part no. 1: HP simulations The differences between ideal gas and real gas model part no. 1: HP simulations](https://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-1.jpg)
The differences between ideal gas and real gas model part no. 1: HP simulations Przemysław Smakulski 26 -04 -2018
![After meeting in GSI After meeting in GSI](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-2.jpg)
After meeting in GSI
![From CFX manual From CFX manual](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-3.jpg)
From CFX manual
![Equations of state difference Applicability Ideal gas model Real gas model Conditions from ANSYS Equations of state difference Applicability Ideal gas model Real gas model Conditions from ANSYS](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-4.jpg)
Equations of state difference Applicability Ideal gas model Real gas model Conditions from ANSYS manual For NITROGEN Temperature range: 100 – 1000 K Conditions from NIST For NITROGEN Pmax = 1 MPa - considereing simulations max. inlet pressure Tmax = 297. 3 K - considereing simulations max. inlet temp. Pmax/PC = 0, 294481 < 1 Tmax/TC = 2, 353594 > 2 Conditions satisfied always Conditions satisfied
![Equations of state difference Ideal gas model Redlich Kwong Standard Model: Equations of state difference Ideal gas model Redlich Kwong Standard Model:](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-5.jpg)
Equations of state difference Ideal gas model Redlich Kwong Standard Model:
![Real Gas properties NITROGEN [1] B. J. Mc. Bride, S. Gordon, M. a. Reno, Real Gas properties NITROGEN [1] B. J. Mc. Bride, S. Gordon, M. a. Reno,](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-6.jpg)
Real Gas properties NITROGEN [1] B. J. Mc. Bride, S. Gordon, M. a. Reno, Thermodynamic Data for Fifty Reference Elements, (1993).
![Position of the first skimmer (for all cases) Gas: Nitrogen 5 mm 0. 4 Position of the first skimmer (for all cases) Gas: Nitrogen 5 mm 0. 4](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-7.jpg)
Position of the first skimmer (for all cases) Gas: Nitrogen 5 mm 0. 4 mm Zero thickness Skimmer inlet De. Laval nozzle 30 mm throat; 3 bar Inlet pressure Numerical domain representation
![Results Ideal gas model Real gas model Results Ideal gas model Real gas model](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-8.jpg)
Results Ideal gas model Real gas model
![Results Ideal gas model Real gas model Results Ideal gas model Real gas model](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-9.jpg)
Results Ideal gas model Real gas model
![Results Ideal gas model Real gas model Results Ideal gas model Real gas model](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-10.jpg)
Results Ideal gas model Real gas model
![Comparison Gas: Nitrogen Nozzle throat 30 mm Only half of the domain is considered Comparison Gas: Nitrogen Nozzle throat 30 mm Only half of the domain is considered](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-11.jpg)
Comparison Gas: Nitrogen Nozzle throat 30 mm Only half of the domain is considered The data line nozzle skimmer Symmetry axis
![Example from the publication Example from the publication](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-12.jpg)
Example from the publication
![Conclusions • There is no significant difference between real gas and ideal gas model Conclusions • There is no significant difference between real gas and ideal gas model](http://slidetodoc.com/presentation_image_h2/7653f00a8f4c41e148590fe8dcbaa3d1/image-13.jpg)
Conclusions • There is no significant difference between real gas and ideal gas model for HP simulations • A difference of the numerical model on the border between HP and LP side is still unknown.
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