Chinese Engine Development

jobjed

Captain
I don't see any comments from Gongke101.
Nein!!! The mods limited his posts' visibility to himself only.

I skimmed through that thread before it got censored, I'll collate the bits of info I could remember.
  • WS-10 has at least six variants
    • WS-10 original
    • WS-10B for J-10 series
    • WS-10D for J-16 and Flanker series - closely related to WS-10B
    • WS-10H with H standing for 海 or sea
    • WS-10IPE - 14t thrust variant
    • WS-10J with J standing for 舰载 or shipboard, AKA carrier aircraft engines
  • Both the manufacturer and customer lost enthusiasm for the WS-10B so while it exists and is undergoing certification, there's no impetus to adopt it on J-10s
    • Gongke101 believes it's because the number of J-10s equipped with AL-31s have already formed a critical mass and a switch to WS-10s would encounter significant systemic inertia
  • WS-10H was the former name of the WS-10J but is now the name of the variant used on PLANAF J-11Bs
  • WS-10J is the variant designed for J-15s; he mentioned something about the outlook of this variant but I forgot what he said
  • When asked about the announcement about the WS-15 achieving design certification in 3 to 5 years, Gongke101 said it was very possible because he hasn't heard any bad news about the WS-15 lately
 

by78

General
According to this press release from the Chinese Academy of Sciences, a new process for fabricating complex turbine blade cooling holes has achieved a milestone. If I'm reading this correctly, a new laser five-axis drilling machine and its associated control software passed expert assessment.

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7月19日,中国科学院宁波材料技术与工程研究所所属二级所先进制造所激光与智能能量场制造工程团队承担的中科院仪器装备研制项目“航空发动机涡轮叶片复杂异型孔加工系统”技术验收会议在宁波材料所举行。来自中科院上海光学精密机械研究所、中科院上海硅酸盐研究所和宁波海天精工的专家以及团队10多名科研人员参加了现场技术测试。

  专家组听取了项目负责人张文武的项目工作报告,现场审议了技术测试大纲,并按照测试大纲逐项测试技术验收指标,现场进行五轴联动坐标转换、自动对焦与补偿、法向自动检测与倾角控制、多工位异型孔CAD驱动智能化加工等功能演示,并对平板零件和叶片试件进行现场打孔,充分考察了装备的运动能力、工艺能力及内核控制系统智能化水平。根据实施方案中的指标要求和实测结果,专家组认为所研制的“航空发动机涡轮叶片复杂异型孔激光加工系统”技术指标均达到或优于实施方案规定,圆满完成了研制任务,意义重大,同意通过技术验收。

  航空发动机对国家安全和国民经济意义重大,航空发动机的一大性能指标是涡轮前工作温度,其提升取决于高温材料、热障涂层和气膜冷却技术的全面进步,其中先进气膜冷却技术对温度提升量的贡献约占2/3。上世纪80年代中期,美国率先使用了复杂异型孔气膜冷却技术,涡轮叶片等热端部件的等效冷却效率从0.3提高到了0.5以上,并在继续进步中。我国则由于自主加工母机的空缺和加工工艺的落后,长期未能突破复杂异型孔加工技术,先进冷却结构设计无法验证,叶片冷却效率迄今与西方国家存在较大代差。冷却技术滞后,会间接导致发动机可靠性和总体性能的落后。因此,我国亟需突破复杂异型孔加工的自主工业母机和相关工艺技术。

  航空发动机叶片外形扭曲、内腔复杂,要利用激光在叶片上加工出高精度复杂异型孔,存在五轴坐标联动转换、自动对焦与补偿、法向自动检测与倾角控制、CAD驱动多工位自动化加工等众多技术难点。

  针对上述挑战,激光与智能能量场制造工程团队经过六年多持续攻关,在国内率先打通了复杂异型孔技术应用的“仿真-设计-装备-工艺”创新链,并得到中科院装备项目支持,成功研制出“航空发动机涡轮叶片复杂异形孔加工系统”及全套加工工艺,经专家组的鉴定,相关技术指标均达到或优于实施方案规定。该项目得到了宁波大艾激光科技有限公司的大力协助,依托该公司,此项技术已经全面进入产业化阶段。

  “航空发动机涡轮叶片复杂异型孔激光加工系统”为航空发动机及燃气轮机涡轮叶片、燃烧室、火焰筒等热端部件的复杂异型孔精密低损伤加工提供了国产母机和成套工艺方法,并可以扩展应用到三维曲面微细加工,可对金刚石、石英、陶瓷、金属、复合材料、树脂等众多难加工材料进行精密三维加工。该成套技术的突破对推动我国航空发动机、燃气轮机热端部件的技术进步和微细加工能力的突破有重要意义。

Google translation is pretty OK:

On July 19th, the Technical and Acceptance Meeting of the Aerospace Engine Turbine Blade Complex Shaped Hole Processing System was undertaken by the Laser and Intelligent Energy Field Manufacturing Engineering Team of the Advanced Manufacturing Institute of the Institute of Materials Technology and Engineering of the Chinese Academy of Sciences. Held at Ningbo Materials. Experts from the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences, Shanghai Institute of Ceramics of the Chinese Academy of Sciences and Ningbo Haitian Seiko and more than 10 researchers participated in the on-site technical test.

The expert group listened to the project work report of the project leader Zhang Wenwu, reviewed the technical test outline on site, and tested the technical acceptance indicators one by one according to the test outline. On-site five-axis linkage coordinate transformation, autofocus and compensation, normal automatic detection and Deflection control, multi-station shaped hole CAD drive intelligent processing and other functional demonstrations, and on-site drilling of flat parts and blade specimens, fully inspect the equipment's athletic ability, process capability and intelligent level of the kernel control system. According to the index requirements and the measured results in the implementation plan, the expert group believes that the technical indicators of the “Aerospace Engine Turbine Blade Complex Shaped Hole Laser Processing System” have reached or exceeded the implementation plan, and successfully completed the development task, which is of great significance. Pass the technical acceptance.

Aeroengines are of great significance to national security and national economy. One of the performance indicators of aero-engines is the pre-turbine operating temperature. The improvement depends on the overall progress of high-temperature materials, thermal barrier coatings and film cooling technology, among which advanced film cooling technology The contribution of temperature increase is about 2/3. In the mid-1980s, the United States took the lead in using complex shaped pore film cooling technology, and the equivalent cooling efficiency of hot-end components such as turbine blades increased from 0.3 to over 0.5, and continues to progress. In China, due to the vacancy of the autonomous processing machine and the backwardness of the processing technology, the long-term failure to break through the complex shaped hole processing technology, the advanced cooling structure design can not be verified, the blade cooling efficiency has so far been different from the Western countries. The lag in cooling technology can indirectly lead to backward engine reliability and overall performance. Therefore, China urgently needs to break through the independent industrial machine tool and related process technology of complex shaped hole processing.

The shape of the aero-engine blade is distorted and the internal cavity is complex. It is necessary to use laser to machine high-precision and complex shaped holes on the blade. There are five-axis coordinate linkage conversion, autofocus and compensation, normal automatic detection and inclination control, CAD-driven multi-station automation. Many technical difficulties such as processing.

In response to the above challenges, the laser and intelligent energy field manufacturing engineering team has been working on the “simulation-design-equipment-process” innovation chain of complex shaped hole technology in the country after more than six years of continuous research, and has been supported by the Chinese Academy of Sciences equipment project. Developed a "complex shaped hole machining system for aero-engine turbine blades" and a complete set of processing technology. After the expert group's appraisal, the relevant technical indicators have reached or exceeded the implementation plan. The project has been greatly assisted by Ningbo Daai Laser Technology Co., Ltd., relying on the company, this technology has entered the stage of industrialization.

"Aerospace engine turbine blade complex shaped hole laser processing system" provides domestically produced mother machine and complete set of process methods for complex and special low-damage processing of aero-engine and gas turbine turbine blades, combustion chambers, flame tubes and other hot end parts, and can be extended and applied. Micro-machining of three-dimensional curved surfaces enables precise three-dimensional processing of many difficult-to-machine materials such as diamond, quartz, ceramics, metals, composite materials, and resins. The breakthrough of this complete set of technologies is of great significance to promote the technological advancement of China's aero-engine and gas turbine hot end components and the breakthrough of micro-machining capabilities.

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SinoSoldier

Colonel
When asked about the announcement about the WS-15 achieving design certification in 3 to 5 years, Gongke101 said it was very possible because he hasn't heard any bad news about the WS-15 lately

Not exactly a strong line of argument from him, is it? "No news" could mean anything.
 

SinoSoldier

Colonel
How are you sure it doesn’t? No one knows. Let’s all stop making presumptions. Rejecting or accepting predictions based on nothing but our biases isn’t productive.

Exactly, so "Gongke101" had no business claiming that no news = good news. We'll have to wait and see.
 

taxiya

Brigadier
Registered Member
Exactly, so "Gongke101" had no business claiming that no news = good news. We'll have to wait and see.
We all know it is not that meaningful to make judgement on a few words. But I think you actually mistaken the words from Gongke101. His original words in post #4772 was
he hasn't heard any bad news about the WS-15 lately
While you thought he said "no news".

"No news" means nothing positive, nor negative, 50/50 chance of both directions.

"No bad news" means either there is no news at all, or the news is all good, as far as he knew. This is way much more positive than what you interpreted.

Pretty much like the English phrase "not bad" is a refrained complement.
 

SinoSoldier

Colonel
We all know it is not that meaningful to make judgement on a few words. But I think you actually mistaken the words from Gongke101. His original words in post #4772 was

While you thought he said "no news".

"No news" means nothing positive, nor negative, 50/50 chance of both directions.

"No bad news" means either there is no news at all, or the news is all good, as far as he knew. This is way much more positive than what you interpreted.

Pretty much like the English phrase "not bad" is a refrained complement.

If he has been receiving good news all along, then this definitely might hint that the WS-15 project is going well. However, it is still better to hold our horses since there has been conflicting reports as well.

Personally I would not be surprised if the WS-15 won't make it into service in mid-late 2020s. 2024-2025 seems to be the frequently-quoted IOC date. Of course, I would be pleasantly surprised if it's earlier.
 
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