Chinese Engine Development

Hendrik_2000

Lieutenant General
Well this is real for sure at last they crack the production of single crystal turbine blade From Global T today
It was posted before but this time we get more news and show at national news
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GT(Gas Turbine) technology is highly restricted and China is excluded. So she has to invent everything themselves from production equipment all the way to the metallurgy. It take more time but China gain independence
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Chinese enterprise makes core component of aircraft engines: report
Source:Global Times Published: 2017/10/24 21:53:39

Chengdu Aerospace Superalloy Technology Co (CAST), a listed mining company, made a great breakthrough in producing a single-crystal blade, the most important part of an aviation engine, national business channel CCTV 2 reported on Monday.

Designed to work at the highest temperatures, under the most complicated pressure levels and exposed to the most adverse environment in the engine, the single-crystal blades were produced by CAST to a high standard and used customized casting techniques.

The single-crystal blades directly determine the performance of an aviation engine.

"Specifications of the turbofan engine have reached an advanced international level. All components have independent intellectual property rights for both design and production, especially the most difficult part - the single-crystal turbine blades inside the engine," Xu Gang, a member of the aircraft engine R&D team and dean of the Laboratory of Light-duty Gas-turbines in the Institute of Engineering Thermophysics of the Chinese Academy of Sciences, was quoted as saying in the report.

The development has broken the US monopoly in the global market, said the report.

In the core of a thrust engine, the component consists of 60 single blades. Each blade outputs power that is equivalent to a sport utility vehicle car with a 2.0 liter engine and the temperature is more than 1,720 C.

To avoid melting, the materials for single-blade production include a rare metal called rhenium.

To maintain its dominant position in the aviation industry, the US and some other Western countries have blocked China from both material and technical details for years, according to the report.

CAST is able to purify rhenium for the blade product in a customized furnace now, it said.
 

by78

General
A Chinese TV segment has briefly touched on main ball bearings used in turbofan engines (around 11:30 mark in the video below). According to the segment, China is working to improve the lifespan of ball bearings from 300 hours to 4000 hours.


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siegecrossbow

General
Staff member
Super Moderator
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11月21日,在动力所条件建设部的精心组织下,在十六室、总体一部、能源动力保障中心、保卫部等兄弟单位的大力配合下,十二室首次完成了某型发动机喷口红外辐射测试任务,获得了测试位置的红外辐射测试数据,验证了红外测试方法的有效性。

Looks like they've tested IR suppressing nozzles on November 21st.
 

Air Force Brat

Brigadier
Super Moderator
Not sure how reliable is this news. From Oedo

The first mass-produced WS-20 seems to be delivered, we will conduct test by mounting it on Y-20 from now on

DPo3WDIWkAAFTh-.jpg

We can only hold our breath and hope!, LOL, I'm sure many of us have had our hair turn to grey, and some of us are even losing hair as we speak?? LOL
 

taxiya

Brigadier
Registered Member
Not sure how reliable is this news. From Oedo

The first mass-produced WS-20 seems to be delivered, we will conduct test by mounting it on Y-20 from now on

DPo3WDIWkAAFTh-.jpg
The attached report is about a coordination meeting for development of engine reverse thrust device. I agree that it is most likely related to WS-20. But the meeting (in the 3rd paragraph) talked about development progress in 2017 and development plan for 2018. That means the engine will remain being under development in 2018.

I don't think we can say "mass"-produced at this moment.

Regarding whether WS-20 can be mounted on Y-20 now, I think the article can not be seen as an indication because the lack of "reverse thrust device" did not stop WS-20 being mounted on the testbed, so there seems to be no relation between the progress of the device and mounting on Y-20.
 

schenkus

Junior Member
Registered Member
The attached report is about a coordination meeting for development of engine reverse thrust device. I agree that it is most likely related to WS-20. But the meeting (in the 3rd paragraph) talked about development progress in 2017 and development plan for 2018. That means the engine will remain being under development in 2018.

Is the article clear about the institution(s) that held that meeting ?
Could this be about the WS-18, or would that engine be further along the development path ?
 

Orthan

Senior Member
How long has the ws-20 engine been flight-tested ? 4 years? Is it normal for an aircraft engine of this kind to take that long to develop? If not, then the program has hit trouble.
 

Hendrik_2000

Lieutenant General
How long has the ws-20 engine been flight-tested ? 4 years? Is it normal for an aircraft engine of this kind to take that long to develop? If not, then the program has hit trouble.

It is more than normal The average development time of Civil airliner jet engine is between 2 and 3 decade. I would say the way China develop the engine is fast
Read this article It take Pratt and whittney 30 years to develop this engine

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Pratt & Whitney’s new PurePower Geared Turbofan aircraft engines are impressive beasts. Scheduled to enter commercial service before the end of the year, they burn 16 percent less fuel than today’s best jet engines, Pratt says. They pollute less. They have fewer parts, which increases reliability. And they create up to 75 percent less noise on the ground, enabling carriers to pay lower noise fees and travel over some residential areas that are no-fly zones for regular planes. Airbus, Bombardier, Embraer, Irkut, and Mitsubishi have certified the engines for use on their narrowbody craft. JetBlue, Lufthansa, Air New Zealand, Malaysia’s Flymojo, and Japan Airlines are among the engine’s 70 buyers in more than 30 countries.

To people outside the aircraft business, what may be most remarkable about the engines is that they took almost 30 years to develop. That’s about 15 times as long as the gestation period of an elephant and unimaginably longer than it takes to pop out a smartphone app. Could Pratt have gotten the hardware out faster? Probably. But industrial innovation on the scale of a commercial jet engine is inevitably and invariably a slog—one part inspiration to 99 parts perspiration.

 

taxiya

Brigadier
Registered Member
Is the article clear about the institution(s) that held that meeting ?
Could this be about the WS-18, or would that engine be further along the development path ?
The institutions are clearly listed.
I don't know about WS-18. I thought it is a Chinese made D-30, so the reverse thruster should not be specially treated in significance.
 
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