How to define a RGP file for liquid air?

eis · May 5, 2010, 23:31

Hello everybody,

I need to simulate the liquid turbine, and the working fluid is liquid air. The pressure range is 0.1Mpa to 5Mpa and temperature reach from 90K to 100k- I'm dealing with a cryogenic application. How can I define this material?

From the doc, we know cfx can define the liquid phase materials, but the doc explains not clearly. I just know when you define the liquid material you need to set the parameter RGP Liquid Properties = Subcooled in the CCL for the liquid material definition. But, in the example of the organization of .rgp file, i don't know how and where to fill the subcooled liquid tables. Besides, is it necessary to fill the "superheat" tables in the definition of a liquid material?

Thanks a lot!

lyfflynice · July 22, 2018, 05:44

Dear eis,
Have you solve the problem? can you share it with me.

lyfflynice · July 22, 2018, 05:51

Dear eis,
Have you solve the problem creating a RGP file for liquid property? Can you share an example with me?
can you send a liquid RGP file to my e-mail：lyfxjtu@stu.xjtu.edu.cn. I will appreciate it very much!
Best regards!

May 5, 2010, 23:31	How to define a RGP file for liquid air?	#1
eis New Member Join Date: Nov 2009 Posts: 6 Rep Power: 17	Hello everybody, I need to simulate the liquid turbine, and the working fluid is liquid air. The pressure range is 0.1Mpa to 5Mpa and temperature reach from 90K to 100k- I'm dealing with a cryogenic application. How can I define this material? From the doc, we know cfx can define the liquid phase materials, but the doc explains not clearly. I just know when you define the liquid material you need to set the parameter RGP Liquid Properties = Subcooled in the CCL for the liquid material definition. But, in the example of the organization of .rgp file, i don't know how and where to fill the subcooled liquid tables. Besides, is it necessary to fill the "superheat" tables in the definition of a liquid material? Thanks a lot!

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July 22, 2018, 05:44		#2
lyfflynice New Member Yafei Li Join Date: Jul 2018 Location: CHIAN Posts: 16 Rep Power: 8	Dear eis, Have you solve the problem? can you share it with me.

July 22, 2018, 05:51		#3
lyfflynice New Member Yafei Li Join Date: Jul 2018 Location: CHIAN Posts: 16 Rep Power: 8	Dear eis, Have you solve the problem creating a RGP file for liquid property? Can you share an example with me? can you send a liquid RGP file to my e-mail：lyfxjtu@stu.xjtu.edu.cn. I will appreciate it very much! Best regards!