China's Space Program Thread II
- Thread starter Blitzo
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wow, that is crazy. YF-90's hydrogen pump pressure is about 38.6MPa, SSME is 41.854MPa. 70MPa is way beyond the league.The 101st Institute of the Sixth Academy of CASC has successfully tested a new high-pressure (70 MPa) liquid hydrogen pump.
I wonder what is it for? Is it really for rocket engine? The photo doesn't look like. The reason I ask is because I know CASC is involved in Hydrogen compression and storage business where I have seen the figure 70MPa.
by78
General
Hmmm, this might indeed be for the hydrogen economy. Come to think of it, the original Weibo post makes no mention of rockets or the Chinese space program.
Don't remember if this has been shared here. Just for the record that FFSCC isn't invented by SpaceX, CASC isn't either but has studied it much earlier.
2004 paper of FFSCC Methalox 200t engine study.
There is a conclusion interesting, chamber pressure has upper and lower limits. At 10MPa the engine has lowest dead weight, but not necessarily the lowest dead weight for the whole rocket. The reverse is true that at certain higher pressure, the overall gets worse. So there is a balance to be made. This means that high pressure isn't always the best choice.
2008 paper FFSCC HydroLox
2004 paper of FFSCC Methalox 200t engine study.
There is a conclusion interesting, chamber pressure has upper and lower limits. At 10MPa the engine has lowest dead weight, but not necessarily the lowest dead weight for the whole rocket. The reverse is true that at certain higher pressure, the overall gets worse. So there is a balance to be made. This means that high pressure isn't always the best choice.
2008 paper FFSCC HydroLox
WU Yanhua, the chief designer of China's Deep Space Exploration, and WU Weiren, the chief designer of China's Lunar Exploration Program, visited
on Aug 11 to watch the launch of Luna 25. It is the 1st mission of the International Lunar Research Station's basic model
on Aug 11 to watch the launch of Luna 25. It is the 1st mission of the International Lunar Research Station's basic model
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by78
General
Another high-resolution image of the electromagnetic drop tower for micro-gravity experiments.
I think I have found out details of Honglong-1 (红龙一号) from Tianhui (天回)
This is the engine "一种半开式富氧补燃循环发动机" that was discussed before. Here is the patent
The company is established based on the expertise of the same person who owns the patent, 刘红军 Liu Hongjun. The company is owned by NWPU where Liu is employed.
This is what I think how China's commercial space industry works, most part at least. The state owned institutes have lots of people with lots of ideas that are more than state sponsored programs can utilize due to prioritization and risk management. So these institutes establish commercial companies and invite venture capital to try out these ideas. If they turn out to work well, they can feed back to the state program, if they fail venture capital will share the loss. The competence is always built instead of being wasted.
This is the engine "一种半开式富氧补燃循环发动机" that was discussed before. Here is the patent
The company is established based on the expertise of the same person who owns the patent, 刘红军 Liu Hongjun. The company is owned by NWPU where Liu is employed.
This is what I think how China's commercial space industry works, most part at least. The state owned institutes have lots of people with lots of ideas that are more than state sponsored programs can utilize due to prioritization and risk management. So these institutes establish commercial companies and invite venture capital to try out these ideas. If they turn out to work well, they can feed back to the state program, if they fail venture capital will share the loss. The competence is always built instead of being wasted.
by78
General
DeepBlue has successfully completed a 120-second test run of its reusable Thunder-R1 LOX/kerosene engine.
DeepBlue has successful completed a multiple-start test of its Thunder-R1 engine. The test involved three ignitions and shutdowns during the single hot run.
