JH-7/JH-7A/JH-7B Thread

Semi-Lobster

Junior Member
Re: JH-7/JH-7A Thread

中国空军看好新飞豹因为WS15涡扇发动机性能不俗
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2009-02-10 01:42:33 点击:



中国空军看好新飞豹因为WS15涡扇发动机性能不俗

2009-02-10 09:45:17.0

飞豹"家族羽翼待丰,前景激情涌动

歼轰-7A唯一一个有可能的就是西安红旗厂现在策划改进ws9的ws15,

"秦岭--2"涡扇发动机是为满足JH-7A研制的一种先进双转子加力式涡扇发动机。其方案研究工作始于1998年初。全面研制工作于1999年初

开始,由中国燃气涡轮研究院624所与西安航空发动机公司共同研制,西安航空发动机公司为承制单位。1999年初~2003年初完成核心机与验证

机试验。2001年5月核心机首次试验,对核心机进行了大量的可靠性与耐久性方面的试验,大幅度的提高热端部件寿命,2003年6月原型机首次运

转并开始地面台架试车。加速发动机的成熟,延长零部件的寿命,降低生产成本和后勤保障费用。试飞前规定试验于2005年12月完成, 于2006

年初,在JH-7上进行首飞,于2008年10月完成设计定型试验。重新编号为WS-15,代号"秦岭--2"

"秦岭--2"WS-15涡扇发动机在保持WS-9发动机外廓尺寸和附件布局基本不变的情况下,在继承国内成熟技术的基础上,通过运用大量成熟

的先进技术和多项预研成果,从增加发动机涡轮前温度和减轻结构重量两个方面对WS-9(斯贝MK202)原型机进行现代化改进,大幅度提高了发

动机的技术性能,达到了M53P2发动机中后期的技术水平。(WS-9为早期产品 WS-9A为全国产化的生产型)

"秦岭--2" WS-15涡扇发动机在WS-9发动机的基础上作了如下几个方面改进:

1. 结构改进的特点是以WS-9为基础改进设计了带气动雾化喷嘴的环形燃烧室

2.优化设计了高压涡轮叶片,改为不带冠设计,采用气膜加对流复合冷却技术

3.对重新设计了风扇,在设计过程中借鉴了国内一些先进涡扇发动机的结构设计预研成果,

风扇由原来的5级改为4级,提高了压缩比

4.对加力燃烧室和尾喷管进行优化设计,采用新的耐高温合金材料,改进冷却设计,减轻重量

5.取消附 面 层控制系统 

6.对其它部件、系统、成件等作了适应性改进。为减轻重量进一步扩大了钛合金的应用范围

涡扇9官方资料(中国航空信息中心)

牌  号 涡扇15

用  途 军用涡扇发动机

类  型 涡轮风扇发动机

研制单位 中国燃气涡轮研究院624所

西安航空发动机公司

国  家 中国

厂  商 西安航空发动机公司

生产现状 

装机对象 歼击轰炸机

研制情况

技术数据

最大加力推力(daN)    10951.50

最大不加力推力(daN)    6767.88

最大加力耗油率[kg/(daN?h)]          2.02

最大不加力耗油率[kg/(daN?h)]         0.692

推重比(国际标准)                6.979

空气流量(kg/s)                 112

涵道比                     0.62

总增压比                    21.5

涡轮进口温度(℃)                1277

最大直径(mm)                  1093

长度(mm)(喷口全开时)              5205

(喷口面积最小时)            5061

质量(kg)(不包括飞机附件)            1600
WS-15 was improve version of WS-9.
Chinese engineers using new technology to redesign the Spey 202 (ws-9) itself a early 60's technology.
increase of inlet temp. new production method,new alloy result was improve engine.

Interesting article. I wonder if the new engines will only go into new aircraft or or if the entire fleet will be re-engined?
 

xywdx

Junior Member
Re: JH-7/JH-7A Thread

Hey ... seems as if the 11. Div (31. Reg at Siping) received JH-7A's !! :china:

Deino

I actually heard about that last year, but I discredited the source because the source said that Siping was being equipped with J-14, which was officially known as the JH-7?!?!:confused:

I find it hard to believe because according to official sources(western sources) the J-14 was a 5th generation fighter in development to compete with F-22.
 

ChinaSoldier

New Member
Re: JH-7/JH-7A Thread

Original interview preserved for archive use






Google translation of the interview.

Feibao total division: Flying Leopard users on the performance of speculation and look forward to more realistic

Global Times special correspondent in Zhuhai Shi Jun Hao: Recently, the Global Times correspondent on the number of users are most concerned about, the Flying Leopard Tang, chief designer of long-range aircraft carried out an exclusive interview with red, the experience of flying to attend the air show in Zhuhai Leopard aircraft with powerful forces.

Reporter: Hello Tang total, the Zhuhai Air Show, the Air Force dispatched F-10 flying with the leopard represents two of China's advanced level of the two combat aircraft, is the difference between the two planes where?

Tang total: Feibao series aircraft is in our self-made heavy, supersonic, all-weather fighter-bomber, China's current offensive main types of fighters, mainly responsible for stand-off on the sea, on land the all-weather precision strike missions; -10 F Aircraft air-to-air combat is a mainly defensive battle (fighter) aircraft.

Reporter: Can you tell us why the Air Force will be asked to develop offensive across the main tasks for the new Flying Leopard fighter then? New Flying Leopard compared to 1998 when the exhibition Flying Leopard fighter who has the distinction and improve? Flying Leopard now mainly in the power of those on the performance characteristics of its on-board radar-like performance how?

General Tang: According to the Duhei "air supremacy" theory, is to win all of the air war on the premise that the way to seize control of the air, Duhei that is to take offensive action in the air, destroying enemy aircraft on the ground, and through the air or take other defensive measures It is impossible to seize the control of the air. An effective air force to seize control of the air, should be accounted for the main attack aircraft. At the turn of the century, domestic and international situation changes, China at the time of an urgent need to be able to decide the outcome of a war offensive force, Air China from land to air "both offensive and defensive capabilities" in transition, a new type of Flying Leopard fighter came into being .

The air show participation in the Flying Leopard fighter from the point of view and appearance before the Flying Leopard fighter is not very different, but the fundamental difference between them lies in the performance and combat capability.

Thanks to the new demands and new tasks, the Flying Leopard with the new technology has not eliminated a number of advanced technologies, such as the Flying Leopard's new flight control system has been simulated by the fly-by-wire replacement for the fly-by-wire systems, also achieved a glass Of the cockpit, always hand-under-the-art technology, such as manipulation ... ... now the Flying Leopard fighter, and also Zaidan Liang increase in maximum take-off weight of 11% to improve, but so was reborn Flying Leopard fighter change is a new type of China-made avionics System, which not only reduced the combat pilots of the burden, but also makes flying leopard can carry on the way to the sea in the number and types of weapons increased, many of which are advanced precision-guided weapons, but also now have the Flying Leopard The strong expansion of capacity, with the potential for further development.

Flying Leopard now on the radar aircraft, I can tell you that, for both an air-to-earth and accurate multi-purpose combat aircraft, and its radar is not a very advanced, very full (laughs).

Reporter: As we all know, the new Leopard has been flying in the Air Force take on the vital task of the Air Force's Flying Leopard fighter planes also participated in 2007 - the peace mission of the Sino-Russian joint military exercise, I would like to ask the General Tang, the new air force to fly the Leopard there What evaluation? Pilot population, "the best use of the aircraft," What does this mean?

Tang total: that the Air Force fighters Flying Leopard now has to raise the quality, reliability and practicality, so that the air force's combat modes and scope of operations has made the rich and raise for pilots, "the best use of the aircraft "The assessment is a result of the pilot to fly to the ergonomic design of the leopard in the affirmative, will allow pilots in flight feel comfortable, but I believe that the leopard family of aircraft to fly, there is no best, only better, leopard series aircraft to fly a certain There is constant progress and development.
Reporter: General Tang, Feibao series aircraft in the eyes of users has been the focus of one of the Internet has been a heated debate, for your friends to the leopard family aircraft to fly some of the views and perspectives have any thoughts?

General Tang: I love the Internet, users know that the leopard family of aircraft to fly to the comments of many, I am very concerned about it online discussion, for fans of military aircraft flying leopard assessment of the performance of speculation and many look forward to the future Are realistic (laughter).

For all aircraft flying leopard series of criticisms and opinions of our designers continue to develop a better impetus and direction of the aircraft, if you will be well received, the aircraft design as a team, I would be very pleased.

Reporter: Tang of the total, would like to know a lot of friends in the development of the new Flying Leopard, a flying hospital has been equipped to meet the requirements of the development of next-generation fighter's ability?

Tang total: Feibao Series aircraft development process is complete, the design team of younger, I also realize that the predecessors of it is not easy, the Flying Leopard, a collection of the older generation of designers experience and a new generation of designers Wisdom. The successful development of a model necessarily means bringing up a number of talented people, such a project gains, first brought out the human resources and improve the technology, is the third received new equipment.

As a flying hospital itself, charged with the mission of developing a new generation of fighter planes, has experienced a number of Model temper of our technology in continuous improvement, for the problem, the answer is yes.

Reporter: Tang of the total, I finally put a majority of the users are most concerned about a problem, unfortunately, if this war comes to our heads, on behalf of the "China forces" of the new Flying Leopard fighter is able to take delivery of the country and the people of the burden?

Tang total: Please be assured that the new Flying Leopard from design to construction, each of the parts are completely rely on our own, "China forces" there is absolutely no need to rely on foreign support, I would like the new Flying Leopard given to the completion of the motherland and the people It is the sacred mission with absolutely no problem.
I logged in just to say what an amazing translation this was by google. It made some very, very good guesses based on context. For example the characters "defense zone outside" became "stand-off" (excellent), and "machine" became "aircraft".
wow...wow! I'm simply amazed by the success of statistical technique used by google.

the one mistake is the repeat use of "General Tang". More accurately it is "Chief Tang". Tang was not a military general, but the chief engineer. there's also some tendency to reverse the meaning of sentences, for example "not ordinarily (extraordinarily) advanced" became "not advanced". :)

Because the JH-7 is an old design whose development started in the 70s. Due to China's backwardness and playing catchup, the finished version ended up coming out in the 2000's not in the Eighties.

I would tend to think the JH-7A becomes redundant once the J-10 and J-11s acquire even more air to surface capability, and that's only a matter of time, and some electronics and software additions to go.
I want to remind also JH-7A, J-7, J-8 remain the only 3 fighters China can produce without foreign support, a point stressed by chief designer Tang. This is obviously crucial if China ever fights itself in an attritional war. As unlikely as this may seem, Chinese just like the Russians want to defend against such a scenario.

I somewhat disagree with the idea that China operates too many fighter types. Each fighter type is operated in much great numbers than say, the number of F16's used by Singapore. If RSAF, which is considered to be highly efficient, is willing to operate F15, F16, F5 in smaller quantities than any PLAF/PLAN aircraft, this does not point to lack of efficiency of scale. A benefit of having multiple types, besides the optimization for missions, is it gives different teams an ability to innovate and explore in slightly different directions. JH-7A itself has been praised by pilots as "the most friendly fighter".

BVR capability would be great for export. But at this time JH-7A doesn't look competitive against the JF-17. It's expensive to engine and to fly, and it's too much specialized for China's sea control doctrine in my opinion. The range might have been useful in say, Latin America, but they do not have a history of buying Chinese weapons.
 
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Semi-Lobster

Junior Member
Re: JH-7/JH-7A Thread

This has been overshadowed by the whole J-10B buisness but the JH-7A of the PLAAF 28th Attack Division have a new ECM Pod.

HJ-7A-1238339154_33063.jpg
 

Semi-Lobster

Junior Member
Re: JH-7/JH-7A Thread

This has been overshadowed by the whole J-10B buisness but the JH-7A of the PLAAF 28th Attack Division have a new ECM Pod.

hj7a123833915433063.jpg
 

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
Re: JH-7/JH-7A Thread

This has been overshadowed by the whole J-10B buisness but the JH-7A of the PLAAF 28th Attack Division have a new ECM Pod.

[qimg]http://img10.imageshack.us/img10/5515/hj7a123833915433063.jpg[/qimg]

Hmm ... I don't think that this is an ECM-pod ... IMO it looks more like the dat-link-pod for the YJ-91 or KD-88 ARM.

Somewhere I've seen a better picture, but currently I can't find it.

Deino
 

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Husar

New Member
Re: JH-7/JH-7A Thread

Anyone know anything about this ?

Please, Log in or Register to view URLs content!


Found it here:

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Apr.16 (China Defense Mashup Reporting by Johnathan Weng) - "China Defense Mashup" has reported a video news of an unknown electronic jammer carried by JH-7A fighters, which are from the 27th regiment (Location: Ledong Airport, Hainan Province) of 9th air division of PLA navy Southern Fleet aviation troops.

Now we have a larger and clearer image of the jammer. Now we have a larger and clearer image of the jammer. In this image, the most interesting part is the gradient belly devices under the jammer. Besides, the detailed type and performance of this jammer are still unknown.
 

crobato

Colonel
VIP Professional
Re: JH-7/JH-7A Thread

We have seen that pod before in various pictures, but not as clear or as big as this shot. No information has been given but it may have been mentioned in any of the Chinese defense exhibits in the past.
 

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
Re: JH-7/JH-7A Thread

Besides that it's not an "A" but an older JH-7 ... so both types could carry these posd.

Just another question regarding that new PLA-NA regiment mentioned at CDF .. any idea, what unit it could be ?

Deino
 

crobato

Colonel
VIP Professional
Re: JH-7/JH-7A Thread

I thought that the 9th Division PLAN had JH-7As. The JH-7s stopped at two regiments in the 6th Division. Supposedly. Now it seems that the 9th Division regiment contains both JH-7 and JH-7A.

On the new JH-7A regiment at the NSF, I'm not sure who it is. My impressionable guess is another regiment of the 5th Division, which has already one regiment converted. But its just my guess.
 
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