Errymath: WS-15

CCTV on WS-15 Turbofan Assembly Line

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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjy7SE5Y7Tv6ZFq1Jf_KUvZArIw-_nBrH0AlhK3tNwcm3uxFZUM-uGXtmJGY3aopudGzxnuB5FSQIp0CVH0HZiekxibC2KMA8S_d4n-cBl-1hbbLBnO2cslEIYS4WDEt4_xl-RqJoRj15A/s1600/J-20+already+equipped+domestic+engine++The+evening+of+May+25th+CCTV+program.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="427" data-original-width="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjy7SE5Y7Tv6ZFq1Jf_KUvZArIw-_nBrH0AlhK3tNwcm3uxFZUM-uGXtmJGY3aopudGzxnuB5FSQIp0CVH0HZiekxibC2KMA8S_d4n-cBl-1hbbLBnO2cslEIYS4WDEt4_xl-RqJoRj15A/s1600/J-20+already+equipped+domestic+engine++The+evening+of+May+25th+CCTV+program.jpeg" /></a><br />
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Some people keep claiming WS-15 began bench testing on 2015, but according to this article, <b>ground bench testing of the engine core was completed on 2005</b>.<br />
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<a class="externalLink" href="http://blog.sina.com.cn/s/blog_5387c42f0102xjuz.html" rel="nofollow" target="_blank">http://blog.sina.com.cn/s/blog_5387c42f0102xjuz.html</a><br />
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1.) 2000年,   WS-15核心机开始研制。 <b>"2000, WS-15 engine core start to develop."</b><br />
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2.) 2005年：WS-15核心机完成地面台架测试。<b>"2005: WS-15 engine core completed ground bench testings"</b><br />
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3.) 2006年:   WS-15发动机立项。<b>"2006: WS-15 engine project was formally established."</b><br />
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4.) 2009年12月：WS-15核心机完成高空台测试。<b>"December 2009: WS-15 engine core completed high altitude platform tests."</b><br />
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5.) 2011年：中航黎明完成WS-15验证机, 并提前交付。<b>"2011: Liming Factory completed the WS-15 prototype, and was delivered ahead of schedule."</b><br />
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6.) 2012年底--2013年初：WS-15工程验证机通过高空台测试<b>。"early 2013: WS-15 engineering prototype passed high altitude testings."<br />
</b><br />
7.) 2014年：歼20第2011号进行WS-15单发试飞。<b>"2014: J-20, number 2011, started testing with one WS-15 engine." (the other engine was probably the older version of WS-15)<br />
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8.) 2015年：歼20第2016号进行WS-15双发考核试飞；<b>"2015: J-20, number 2016, with two WS-15 engines verification testings.<br />
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9.) 2016年：歼20第2101号生产型完成定型。<b>"2016: J-20, number 2101, completed production model testings."<br />
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10.) 2016年底：歼20第2101号量产服役型奔赴珠海航展。<b>"end of 2016: J-20, number 2101, production and service model, demonstrated at the Zhuhai China Airshow.<br />
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Notice, This article gave very specific dates and testing and develop 
timeline. The writer obviously got insider level informations.
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CCTV on WS-15 Turbofan Assembly Line

Some people keep claiming WS-15 began bench testing on 2015, but according to this ...

J-20 has begun to install WS-15 domestic engine? Contrast exposure

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The evening of May 25th, CCTV program exposure, J-20 already equipped domestic 
engine.<br />
<b>J-20 will surpass in competitions with all fifth generation fighter and become the best fifth generation fighter in the service.</b><br />
  <br />
J-20 to assemble domestic engine rumors actually started in 2014, 
WS-15 "Emei" engine in research information is not a secret.<br />
In 
May 23rd, Jacksonbobo released a J-20 2001 prototype photos, careful 
observation, 2001 photos on the engine with the engine before the 
release is not the same, some analysts believe that this is the 2001 
prototype play warm-up, in the verification of domestic WS-15 turbofan 
engine.<br />
<b></b><br />
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The following picture is an early prototype
 of 2001. Compared with the photos released by 23 day users, it is found
 that two engines have changed.</div>
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Fighter
 development, new engine test, the general use of early prototypes, and 
Avionics radar using the latest test machine, the J-20 2001 prototype has
 appeared since 2011, has nearly 6 years of time, still play an 
important role.</div>
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Engine local contrast</div>
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The
J-20 at the end of 2016 delivery Chinese air force, because the engine 
performance reasons, unable to achieve the maximum J-20, which is 
considered to be a fighter J-20 with the U.S. fleet of fifth generation 
fighter F-22 gap is the largest part, while in avionics, radar and 
flight, J-20 is thought to be more than ten years of service before 
F-22.</div>
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In
 2017, users found a new outflow of J-20 photos, the nozzle of the two 
engines is very different, analysts believe that the domestic engine has
 been changed</div>
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This
 is the 2012 photo, J-20 2001 prototype, you can find that at this time, 
the two engines are basically the same shape, combined with different 
periods of 2001 photos observed, 2001 prototypes were tested several 
times.</div>
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6 different J-20 number verification machines</div>
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J-20 is expected to do things, once the change of turbofan WS-15, such as rumors of the same powerful, the J-20 will be in the 
competition surpassed F-22, become the best in the service of the fifth 
generation of fighters.<br />
By then, the introduction of the "pulse", "line 
up", "Fei Cheng" will be like the next dumplings, the production of 
"J-20."<br />
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J-20 has begun to install WS-15 domestic engine? Contrast exposure

The evening of May 25th, CCTV program exposure, J-20 already equipped domestic engine. J-20 will surpass in competitions with all fifth ...

J-20Bs with WS-15 Vector Engines ready installed by 2019

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    <a class="TweetAuthor-link Identity u-linkBlend" data-scribe="element:user_link" href="https://twitter.com/xinfengcao"><span class="TweetAuthor-name Identity-name customisable-highlight" data-scribe="element:name" title="dafeng cao">dafeng cao</span>
    
    </a><br />
    J-20 carried with four drop tanks is unveiled for the first time.<br />
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Taiwan’s official Central News Agency says in its report on December 
24 that China will build 500 J-20B, more than the future total number of
 other fifth-generation fighter jets in Asian Pacific.<br />
In its report, the agency quotes Hong Kong military commentator Leung
 Kwok-leung’s December-24 article on Mingpao that speeding up the 
deployment of J-20s is China’s set strategic goal.<br />
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J-20B is an improved version of J-20 installed with China’s new 
homegrown powerful WS-15 Emei turbofans. China has already developed 
WS-15 all-direction vector turbofan with thrust-weight ratio of 10. The 
turbofan is now undergoing intensive tests and will be ready to be 
installed in J-20B by 2019, an improved version of J-20.<br />
Leung’s article quotes Xu Yongling, China’s chief test pilot, as 
saying in the past, “China’s future principal fighter jet J-20 will be 
formally commissioned in 2017. The number deployed will be close to 
100.”<br />
<br />
There has recently been information from external sources that China 
will deploy 4 air regiments of J-20 fighter jets within a short period 
of time. There are 96 fighter jets in 4 regiments, close to the 100 
disclosed by Xu. According to China’s production capacity, it takes less
 than 3 years for China to build so many J-20s.<br />
The article says that China now has two J-20 production lines, one 
producing J-20 with Russian AL-31 engines and the other producing J-20A 
installed with China’s WS-10B Taihang engines.<br />
<br />
Russia has developed 99M1 to 99M4 improved versions of AL-31F, but 
China has also developed improved versions of WS-10, named WS-10A and WS-10B 
better than Russian ones with thrust-weight ratio of 9 than Russia’s 8. <br />
<span class="" id="result_box" lang="en"><span title="，但中国比俄罗斯做得更好，将推重比由8提升到9。

"></span></span><span class="" id="result_box" lang="en"><span title="，但中国比俄罗斯做得更好，将推重比由8提升到9。

"><br /></span><span title="中航集团董事长林左鸣介绍WS-10B时说：「国产第三代单晶叶片极端环境下耐高温达到2000度，目前是全球耐高温最好的叶片，这个指标连美国都做不到。」太行">"In
 the extreme environment of domestic <b>third-generation single-crystal blade uses in WS-10B, the temperature reached 2000 degrees, and it is the best blade 
in the world for high temperature resistance. This index can not be 
achieved even in the United States</b>," said Lin Zuo-ming, chairman of 
CATIC Group. </span><span title="发动机的寿命由此从800小时增加到1500小时，大修间隔达到西方水平。

"> </span></span><br />
<span class="" id="result_box" lang="en"><span title="发动机的寿命由此从800小时增加到1500小时，大修间隔达到西方水平。

">The engine life thus increased from 800 hours to 1,500 hours, overhaul interval to the Western level.</span></span> <br />
<br />
It is said that a third production line has recently gone into 
operation to produce J-20A. As each line makes one J-20 a month, their 
combined production capacity will be 36 a year.<br />
<br />
The article discloses that by the end of 2019, there will be a fourth
 J-20 production line for trial production of J-20B using China’s 
homegrown WS-15 Emei turbofans.<br />
Due to the use of WS-15, J-20B’s cruise speed will be Mach 1.8 and 
maximum speed exceeds Mach 2.2, equal to those of US F-22. China will 
produce 500 J-20B, more than the future total number of other 
fifth-generation fighter jets in Asia-Pacific.<br />
<br />
The article points out that recently the appearance of 4 J-20s with 
serial numbers from 78271 to 78274 have been disclosed on the Internet. 
Such serial numbers are PLA air force’s numbers. All those J-20s have 
low visibility coating.<br />
In addition TerraServer took a satellite photo on November 17 of two 
J-20s at Dingxin Air Force Base in Jiuquan City, Gansu Province. The 
J-20s were obviously taking part in the annual large-scale “Red Sword” 
combined drill in November. The drill is the largest-scale real war air 
force combined drill so far in the world. The photo proves that J-20 
will soon be deployed for real war.<br />
<br />
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J-20Bs with WS-15 Vector Engines ready installed by 2019

dafeng cao J-20 carried with four drop tanks is unveiled for the first time. Taiwan’s official Central News Ag...

J-20 Uses WS-15

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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9I6_fYMRCp38Imji4LMo8jn0M9305XjTx17kuCyOGx9_QYc6C8AA9h5cpxo70O-gccyRxbvGEdyrx7S7DyX23KQNm_UJbHIwckLKoaowYLJPCF9bQlE-bcSxSjiPBJWgUSNu0aJ_zRsk/s1600/J-20++use+WS-15+engines.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="441" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9I6_fYMRCp38Imji4LMo8jn0M9305XjTx17kuCyOGx9_QYc6C8AA9h5cpxo70O-gccyRxbvGEdyrx7S7DyX23KQNm_UJbHIwckLKoaowYLJPCF9bQlE-bcSxSjiPBJWgUSNu0aJ_zRsk/s640/J-20++use+WS-15+engines.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">J-20 proves that it uses WS-15 engines as there are no grooves on the nozzles of its engines.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOnLVnkAYScdS94a17nW-GsUcDfhLrm7ZpytJrwFCBUP_rcDrIMgrwu4PgJ5odAQBwnxgevYVcmNH_CmXp7HMYLT4TGNPnFQlSUEuuBSnakes5ky-bKfQjLs12v6fm4M2Qc7d1_PLXBSs/s1600/AL-31F+engine+used+on+J-20+prototypes.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" height="365" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOnLVnkAYScdS94a17nW-GsUcDfhLrm7ZpytJrwFCBUP_rcDrIMgrwu4PgJ5odAQBwnxgevYVcmNH_CmXp7HMYLT4TGNPnFQlSUEuuBSnakes5ky-bKfQjLs12v6fm4M2Qc7d1_PLXBSs/s400/AL-31F+engine+used+on+J-20+prototypes.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">The nozzle of Russian AL-31F engine used on J-20 prototypes. There are two groves on the nozzle</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgV6OpxNK0DZ7kbnK-zelPjDUpqIYHO_ODwb4StL4PicUzFnSwIloCEGU6E8aKF-wNuK74dCrFKr6gWRDnulb1vAnV0quDzny3B0Z3l0aATiD07rG-RsQCkf_8iw8odiGA99EjCTeUTQ3c/s1600/WS-15+engine+with+no+grooves.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" height="265" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgV6OpxNK0DZ7kbnK-zelPjDUpqIYHO_ODwb4StL4PicUzFnSwIloCEGU6E8aKF-wNuK74dCrFKr6gWRDnulb1vAnV0quDzny3B0Z3l0aATiD07rG-RsQCkf_8iw8odiGA99EjCTeUTQ3c/s400/WS-15+engine+with+no+grooves.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>E</i>ngine with no grooves on it</td></tr>
</tbody></table>
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 <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2kptJ7kf21VarVRECQltC9WK31Jw3YqHxmeDsGrZqpqnCnkcFdIVNXnAg_fasvK0QmcoUsCb6_BTJlh8ca7m61yNrkohWR83BR4sEUbCXkxIefZ3S-AmrgtOTf_ZdTt7d6zs9W3Uhkx4/s1600/WS-15+is+much+more+powerful+than+AL-31F.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2kptJ7kf21VarVRECQltC9WK31Jw3YqHxmeDsGrZqpqnCnkcFdIVNXnAg_fasvK0QmcoUsCb6_BTJlh8ca7m61yNrkohWR83BR4sEUbCXkxIefZ3S-AmrgtOTf_ZdTt7d6zs9W3Uhkx4/s1600/WS-15+is+much+more+powerful+than+AL-31F.jpg" /></a></div>
WS-15 is much more powerful than 
AL-31F. The AL-31F’s nozzle has shrunk so that the speed of smoke is 
much higher than that of the WS-15 with nozzle not shrunk while they 
produce similar thrust for the J-20<br />
<br />
<h3 style="text-align: left;">
A<a href="http://bbs.tiexue.net/post_3087286_1.html" target="_blank">ero engine development</a>:</h3>
<i>Mil.news.sina.com.c</i>n  in report reveals that the temperature before turbine is 1,474 
degree Celsius in WS-15, the highest in the world. No wonder WS-15 is 
much more powerful than AL-31F.<br />
Its reliability lies between Western and
 Russian ones with a life of 900 hours longer than AL-31F.<br />
Since the engine problem has been solved, J-20 can be regarded as a 
capable modern stealth fighter as it has satisfactory electronics and 
stealth shape.<br />
<br />
<br /></div>

J-20 Uses WS-15

J-20 proves that it uses WS-15 engines as there are no grooves on the nozzles of its engines. The nozzle of Russian AL-31F engine u...

Polysynthetic twinned TiAl single crystals for high-temperature applications

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                                Prof. Chen Guang (in dark suit) at press conference on<br />
                               China’s major breakthrough in aviation and aerospace materials<br />
<br />
<a href="http://news.ifeng.com/a/20160622/49214461_0.shtml" target="_blank">A report on June 22</a>, Professor Chen Guang’s success in developing an 
aircraft engine material much better than US best alloy for aircraft 
engine.<br />
<br />
It seems that the new alloy will allow an engine built with it to operate at 150-200 degrees celsius higher temperature. <br />
<br />
Chen has achieved the success through long-term research with 
the funding from Nanjing Polytechnic University and the state’s Program 
973.<br />
<br />
Prof. Chen’s achievement, Polysynthetic twinned TiAl (PST TiAl) 
single crystals for high-temperature applications, was published on the 
Internet at <a href="http://www.nature.com/nmat/journal/v15/n8/full/nmat4677.html" target="_blank">Natural Materials</a> on June 20.<br />
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<i>Optical micrographs of directionally solidified Ti–45Al–8Nb PST single crystals at different withdrawal rate</i><br />
<br />
General Electric development of the Titanium alloy Ti-48Al-2Cr-2Nb 
(Alloy 4822) as a critical technology for the GEnx engine used in the 
Boeing 787.<br />
Alloy 4822 was hailed as a sensational success in the development of 
aircraft engine materials as it reduces the weight of an aircraft engine
 by 200 pounds, fuel consumption by 20% and discharge of NOx by 80% and 
significantly lowered engine noise.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><img alt="" height="325" src="http://p3.ifengimg.com/haina/2016_26/876bf897b6b3daf_w600_h390.jpg" style="margin-left: auto; margin-right: auto;" width="500" /></td></tr>
<tr><td class="tr-caption" style="text-align: center;">GEnx engine </td></tr>
</tbody></table>
At room temperature, PST TiAl has high tensile ductility of 6.9%, 
yield strength of 708 MPa and tensile strength of 978 MPa, a wonderful 
combination of ductility and strength.<br />
<br />
What is more important for aircraft engine alloy, at the high 
temperature of 900℃ its yield and tensile strength is still as high as 
637MPa and it has wonderful creep resistance. Its minimum creep rate and
 lasting life are <a href="http://www.nature.com/articles/nmat4677.epdf?shared_access_token=xf4x1O7evy7hllqZgMXkBdRgN0jAjWel9jnR3ZoTv0M_PZh_tPhR4KvGgIaM2O8xYaOPsST-H6ZQHzSgjpYlHE16Bcymx4aK9QiHHfQ4GSSNyFEKZwoZ34gcy_Gr6uKoPKnuQqffMsx9FUvB8ECV5uuHwsef-gXOBo3sWNTdsDs%3D" target="_blank">better than Alloy 4822 by one to two magnitudes</a>.<br />
It is
 hopeful that the allow may be used above 900℃ much higher that the 
650~750℃ for Alloy 4822.<br />
<br />
<blockquote class="twitter-tweet" data-lang="en">
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On the cover: Polysynthetic twinned TiAl single crystals for high-temperature applications, <a href="https://t.co/c1rJ72pPnG">https://t.co/c1rJ72pPnG</a> <a href="https://t.co/rEyLcGJBnG">pic.twitter.com/rEyLcGJBnG</a></div>
— Nature Materials (@NatureMaterials) <a href="https://twitter.com/NatureMaterials/status/757919244713680896">July 26, 2016</a></blockquote>
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Polysynthetic twinned TiAl single crystals for high-temperature applications <a href="https://t.co/iXRMkxBB88">https://t.co/iXRMkxBB88</a> <a href="https://t.co/tNknZH3dkX">pic.twitter.com/tNknZH3dkX</a></div>
— Nature Materials (@NatureMaterials) <a href="https://twitter.com/NatureMaterials/status/745266314457948161">June 21, 2016</a></blockquote>
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Polysynthetic twinned TiAl single crystals for high-temperature applications

Prof. Chen Guang (in dark suit) at press conference on China’s major brea...

The seventh J-20 fighter jet prototype has been spotted

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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwxKpCLUx2nEOZmZtCMD51dLq_YRCgrQqZhUMk4vwnRlsYolnGoEb__2eQ8xGb_QBTC2siz0Cf6bHZfHkU_Jl90gN95dNMKRAtX9TM7mRGeiWLUUU_PC7sp4DeEe21MtFiNNFkKv-So3Q/s1600/j20rollout.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img alt="J-20 2016" border="0" height="492" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwxKpCLUx2nEOZmZtCMD51dLq_YRCgrQqZhUMk4vwnRlsYolnGoEb__2eQ8xGb_QBTC2siz0Cf6bHZfHkU_Jl90gN95dNMKRAtX9TM7mRGeiWLUUU_PC7sp4DeEe21MtFiNNFkKv-So3Q/s640/j20rollout.jpg" title="J-20 2016" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">J-20 2016</td></tr>
</tbody></table>
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    <a href="https://en.wikipedia.org/wiki/Xian_WS-15" target="_blank">WS-15 engine</a><br />
<br />
<br />
<a class="externalLink" href="https://en.wikipedia.org/wiki/Xian_WS-15" rel="nofollow" target="_blank">The
 WS-15 is a turbofan engine designed by the Shenyang Aeroengine 
Research Institute and manufactured by Xi'an Aero-Engine Corporation.</a> It is intended to power the Chengdu J-20 fighter<br />
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<a class="externalLink" href="http://www.wantchinatimes.com/news-subclass-cnt.aspx?id=20150913000185&cid=1101" rel="nofollow" target="_blank">If J-20 tests are successful this year, small numbers of J-20 fighters can go into production for frontline units</a>, a military expert told Duowei. Knowledgeable 
sources have said the sensors and cyber warfare capability of the J-20 
are as good as Lockheed Martin's F-35.<br />
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A Pentagon report predicted the J-20 may enter service in 2018 and could have its first squadron of 24 of the aircraft by 2020. <br />
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<a class="externalLink" href="http://nextbigfuture.com/2015/09/new-j20-stealth-fighter-prototype.html" rel="nofollow" target="_blank">Next
 Big Future: New J20 stealth fighter prototype spotted and successful 
tests could start China's J20 stealth production and deployment</a><br />
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<b>USS Ronald Reagan leaves for Japan</b>
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