Chinese Engine Development
- Thread starter jackbh
- Start date
by78
General
The AGT-7 gas turbine is a 7MW-class gas turbine derived from WS-10 Taihang. Suitable for marine propulsion. Civilian applications include power generation for offshore oil and gas platforms, backup power generation, etc.
Some specs:
– Power: 6850kW
– Generator efficiency: 32.1%
– Exhaust flow rate: 27.6kg/s
– Exhaust temperature: 560°C
– Output rotational speed: 8300rpm
Some specs:
– Power: 6850kW
– Generator efficiency: 32.1%
– Exhaust flow rate: 27.6kg/s
– Exhaust temperature: 560°C
– Output rotational speed: 8300rpm
You can’t get fat by cramming one hundred dumplings into your mouth. One step at a time.
The point is when we talk about jet engines，everyone immediately jump into materials. But jet engine is a lot more than just materials, the processing technic is also an important factor.
Some info in this report are outdated. China has the largest and strongest hydrualic press () in the world.
According to this , China completed building three large presses in 2012 alone - a 80K, a 40k and a 30K:
On 精密碾轧技术 (precision rolling for aero-engines? not sure about the translation), AVIC (中航工业) made the in 2014:
Google translation (emphasis mine):
"It has broken through a number of key technologies such as the design and preparation of shaped ring blanks, radial-axis bidirectional rolling, and numerical simulation for precise rolling of shaped rings of difficult-to-deform materials, and has successfully realized the complex cross-section annular shape of difficult-to-deform materials such as superalloys and titanium alloys. Through the precise rolling and forming of parts, the material utilization rate has been increased to more than 20%, and the accuracy has been increased to within 5‰, which meets the independent guarantee of key and important components of my country's aero-engines. The precise rolling technology of engine ring parts has the advantages of reasonable process control, high material utilization rate, dense forging structure, and complete forging streamline. It meets the development needs of high performance, low cost, long life and short cycle development of aero-engine The independent innovation ability in the field of precise rolling and forming of ring parts in my country."
This is an from Jun 2021 about 航宇科技 the company listed in the footnote of the report (emphasis mine):
Not every element of engine manufacturing, or every component has the same impact on performance and capability. Some processing techniques specifically matter more for the economics of running an engine business than for the quality of your engine. Some processing techniques aren’t as essential for the components that use them, and there are alternative material and processing options. Most parts that can be made with forging in particular are often replaceable with other techniques like 3D printing, or are moving to materials that require other techniques like CMCs.
I don't think it's outdated, the info is extracted from this report
which was published in 2021/06/29. So it is pretty up to date.
You do realize that not all factories in China（or any country for that matter）are equal right？There is advanced smart factory，there is also backward small factory，you have to look at the average level of factories in that country. It is actually mentioned in the report
