Chinese Engine Development
- Thread starter jackbh
- Start date
From what I can see, the source is an academic about the performance of a certain engine, which should be the WS-10. cjdby is down now, but from what I remember from reading the thread, the value for IFSD is ten times that of comparable American engines.
Hendrik_2000
Lieutenant General
Via Vincent Here is the link
A paper on the reliability and maintainability of an engine in tropical climates:
Paywall
Free
MTBF: Mean Time Between Failure (target is 150 hours)
IFSD: in-flight shut down (target is 0.1/1000 flight hours)
表 2 发动机 MTBF 和 IFSD 随工作时间变化情况
年度 20** 20** 20** 20** 20**
MTBF 48.54 78.76 90.18 95.55 104.4
IFSD 13.07 2.68 2.27 1.85 2.01
在统计的发动机各类技术质量问题当中，主机故障主要集中体现在振动超标、进气机匣壳体裂纹、整流板裂纹和尾喷管作动筒漏油等方面；传动润滑系统故障集中体现在滑油金属含量超标、磁力密封装置和皮碗漏油、滑油泵组调压活门卡滞等方面；控制系统故障集中体现在燃油增压泵漏油和传感器虚警等方面。
Main issues are:
A paper on the reliability and maintainability of an engine in tropical climates:
Paywall
Free
MTBF: Mean Time Between Failure (target is 150 hours)
IFSD: in-flight shut down (target is 0.1/1000 flight hours)
表 2 发动机 MTBF 和 IFSD 随工作时间变化情况
年度 20** 20** 20** 20** 20**
MTBF 48.54 78.76 90.18 95.55 104.4
IFSD 13.07 2.68 2.27 1.85 2.01
在统计的发动机各类技术质量问题当中，主机故障主要集中体现在振动超标、进气机匣壳体裂纹、整流板裂纹和尾喷管作动筒漏油等方面；传动润滑系统故障集中体现在滑油金属含量超标、磁力密封装置和皮碗漏油、滑油泵组调压活门卡滞等方面；控制系统故障集中体现在燃油增压泵漏油和传感器虚警等方面。
Main issues are:
- Excessive vibration
- Cracks in the air-intake housing
- Cracks in the rectifying plate
- Nozzle lubrication leaks
- Lubrication oil issues
- Metal particles in the lubrication oil exceeds limits
- Magnetic seal
- Pump valves
- Control system - Fuel pressure system sensors and false alarms
And how do you know this is WS-10?
I don't know anything, that was what some said on cjdby. As for how they came to the conclusion, I imagine similarly to any other case of identifying unnamed weapons in official reports, basically by seeing what fits best. For example, China doesn't have that many engines, the timeline works, etc.
by78
General
Thank you for the legwork. I wish cjdby were more reliable; it seems to be down at least half a dozen times a week.
From , the reliable Weibo poster who revealed a lot of key engine breakthroughs through his drawings.
Update ...
Here is the link to the original article from the official CCDI department. The portion in quotes talks about the breakthroughs made in vibration issues.
From what I could gather, this snippet says that 624 has solved the vibration problem associated with domestic engines and that the WS-15 is progressing excellently. If I recall, there was a press release by Shenyang last year which stated that their most important project (presumably the WS-15) had some vibration issues ... so pretty major breakthrough if true.
来自
央广网北京6月27日消息节选：
中国航空发动机集团专制型号总师、沈阳发动机研究所总设计师刘永泉带领科研人员不断进行技术探索，推动我国航空发动机产业迈向更高水平。
刘永泉通过“昆仑”发动机研发试验里积累了宝贵的经验，一干就是34年。从“昆仑”到“太行”，我国的航天发动机实现了自主研制成功到世界最高水准的突破，（注：WS15的进展是顺利的，性能是优异的。之前我们口说无凭，难以令人信服。现在官方权威发声，质疑WS15，说风凉话的朋友，可以洗洗睡了。）刘永泉也完成了从一名设计人员到团队组织核心的转变。
多年来，在刘永泉的带领下，动力所科研团队创新性地提出发展整机动力学，解决了国产发动机使用中最重要的振动问题；（我们发动机的老大难问题终于解决了，这个消息是令人振奋的！）
接下来让我们期待完全体的20姬。
(刘永泉)
Update ...
Here is the link to the original article from the official CCDI department. The portion in quotes talks about the breakthroughs made in vibration issues.
Last edited:
Huh. Why is this being issued through the CCDI?