China catching up on fighter and commercial jet engines

[onebyone]

There is a new online picture which shows that China has made progress on its domestically built engine for its J-20 stealth fighter.

The engines are distinguished by their serrated afterburner nozzles and interior flaps for manipulating the exhaust flow.

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inRead invented by Teads
Once these new J-20s enter service, China will have comprehensively mastered the major parts of fighter technology, including radars, stealthy fuselage, missiles, computers, and engines.

The WS-10X (possibly officially designated WS-10G or WS-10IPE) has sawtoothed serrations on the edges of its afterburning nozzles, like the F-35’s F119 engine. The sawtooth edges provide a gain in stealthiness, as they redirect radar waves away from the nozzles. The straight edges on non-stealthy engines like the current Russian supplied AL-31 engines are major contributors to the radar cross section of a fighter.

China’s new engine compared to Europe and American fighter jet engine

The WS-10X is believed to provide about 14-15 tons of thrust. This may be enough power to allow the J-20 to engage in low supersonic supercruise at Mach 1-1.2 speeds. The Eurofighter Typhoon has a similar low supercruise capability, which means it can hit supersonic speeds without using fuel-thirsty afterburners.

The current F135 engines generates 28,000 lbs of thrust normally, but produces over 43,000 lbs of thrust with the afterburner engaged. Although no service has issued a requirement for an upgraded engine, Pratt and Whitney is cooperating with the US Navy on a two-block improvement plan for the F135 engine. The goals of Block 1 are a 7-10% increase in thrust and a 5-7% lower fuel burn. Technology to better cool turbine blades is included in the plans, which would increase the longevity of the engine and substantially reduce maintenance costs. The goal of Block 2 is to work with the US Air Force’s Adaptive Engine Transition Program, with the intention of introducing technology for an engine rated at 45,000 lb of thrust, to be used in a sixth-generation fighter.

China’s gains in engine connect to broader news in materials. The Chengdu Aerospace Superalloy Technology Company, a privately held corporation, made a major breakthrough in superalloy research. CASTC, according to the Global Times and People’s Daily, is producing world class single crystal turbine blades from rhenium-nickel superalloys; adding rhenium to nickel increases the superalloy’s melting point, allowing for a hotter and more efficient engine. High rhenium content superalloys are used in light weight, high thrust engines like the F-22 Raptor’s F109 turbofan. Previously, the development of Chinese engines like the WS-10 were delayed as they suffered from quality control issues regarding single crystal turbine blades.

https://www.nextbigfuture.com/2017/09/china-catching-up-on-fighter-and-commercial-jet-engines.html

 

[Figaro]

There is a new online picture which shows that China has made progress on its domestically built engine for its J-20 stealth fighter.

The engines are distinguished by their serrated afterburner nozzles and interior flaps for manipulating the exhaust flow.

ADVERTISING

inRead invented by Teads
Once these new J-20s enter service, China will have comprehensively mastered the major parts of fighter technology, including radars, stealthy fuselage, missiles, computers, and engines.

The WS-10X (possibly officially designated WS-10G or WS-10IPE) has sawtoothed serrations on the edges of its afterburning nozzles, like the F-35’s F119 engine. The sawtooth edges provide a gain in stealthiness, as they redirect radar waves away from the nozzles. The straight edges on non-stealthy engines like the current Russian supplied AL-31 engines are major contributors to the radar cross section of a fighter.

China’s new engine compared to Europe and American fighter jet engine

The WS-10X is believed to provide about 14-15 tons of thrust. This may be enough power to allow the J-20 to engage in low supersonic supercruise at Mach 1-1.2 speeds. The Eurofighter Typhoon has a similar low supercruise capability, which means it can hit supersonic speeds without using fuel-thirsty afterburners.

The current F135 engines generates 28,000 lbs of thrust normally, but produces over 43,000 lbs of thrust with the afterburner engaged. Although no service has issued a requirement for an upgraded engine, Pratt and Whitney is cooperating with the US Navy on a two-block improvement plan for the F135 engine. The goals of Block 1 are a 7-10% increase in thrust and a 5-7% lower fuel burn. Technology to better cool turbine blades is included in the plans, which would increase the longevity of the engine and substantially reduce maintenance costs. The goal of Block 2 is to work with the US Air Force’s Adaptive Engine Transition Program, with the intention of introducing technology for an engine rated at 45,000 lb of thrust, to be used in a sixth-generation fighter.

China’s gains in engine connect to broader news in materials. The Chengdu Aerospace Superalloy Technology Company, a privately held corporation, made a major breakthrough in superalloy research. CASTC, according to the Global Times and People’s Daily, is producing world class single crystal turbine blades from rhenium-nickel superalloys; adding rhenium to nickel increases the superalloy’s melting point, allowing for a hotter and more efficient engine. High rhenium content superalloys are used in light weight, high thrust engines like the F-22 Raptor’s F109 turbofan. Previously, the development of Chinese engines like the WS-10 were delayed as they suffered from quality control issues regarding single crystal turbine blades.

https://www.nextbigfuture.com/2017/09/china-catching-up-on-fighter-and-commercial-jet-engines.html

NextBigFuture is a garbage site for Chinese military matters ...

 

[shadows888]

NextBigFuture is a garbage site for Chinese military matters ...

Best place for English language is sinodefenceforum.com . users there have over a decade of PLA watching and some users there are fluent Chinese speakers that can do additional research to spot BS.

 

[Figaro]

Best place for English language is sinodefenceforum.com . users there have over a decade of PLA watching and some users there are fluent Chinese speakers that can do additional research to spot BS.

A forum that I'm also part of ... but I'm talking about primary sources in general ... such as a CSSC publication or Big Shrimp

 

[cirr]

Chinese aero-engine manufacturer shows high-end models at expo

2017-09-12 10:20

Xinhua Editor: Gu Liping

Aero Engine Corporation of China (AECC), the country's leading state-owned aircraft engine manufacturer, will show its high-end products at the upcoming Aviation Expo China 2017.

The company will exhibit its major achievements in promoting integrated military and civilian development at the expo, which will be held in Beijing from Sept. 19 to 22, according to the AECC.

It will exhibit one aircraft engine, two gas turbines, as well as two patented technologies of graphene material and high precision aluminum alloy.

The WZ16, a model of turboshaft engine, jointly developed by the AECC and French aviation giant of Safran, will also be displayed.

The WZ16 can be fitted to a seven-to-eight tonne helicopter, or 13-tonne triple-engine helicopter. On Dec. 20 last year, it completed a successful maiden flight on the AC352, China's first seven-tonne multi-purpose twin-engine helicopter.

Meanwhile, the AECC will exhibit its QD70 gas turbine and 100KW small-sized gas turbine, which can operate on a variety of fuels for multiple uses.

Aircraft and turbo engines are a representative industry for China's industrial development.

The state-owned AECC was set up on Aug. 28, 2016, with a target of accelerating independent research, development and manufacturing of aircraft engines and gas turbines.

Founded in 1984, China Aviation Expo was China's first professional aviation expo. This year it has attracted more than 300 exhibitors from 14 countries and regions.

http://www.ecns.cn/2017/09-12/273215.shtml