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全部话题 - 话题: turbines
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X1
发帖数: 1823
1
记得巡捕都带着红turbine,那么应该是锡克人,不是印度人
如今红头巡捕又跑到美国执法了,traffic stop,直接让人枪杀了,估计白人看着这缠
头就不顺眼,直接给毙了
T****i
发帖数: 15191
2
或者在低水平上搞规模化。实际上是没办法的办法,因为没有高水平的东西。
比如走崎岖山路运wind turbine, 尼玛,拿几架米17一吊,还用那么费事?就像方程很
容易算出来的,用小学算术开练有多大意思?我小学时解了好多那样的题,我离成为数
学家越拉越远了。
中国文化特喜欢抖机灵,连技术,而不是系统性解决问题。这个原因,主要是精英不行
,提供不了系统解决问题的方案,得别人有了自己才能偷着学点,连某某主义都是引进
的,自己的儒家破烂抱着当个宝敝帚自珍了两千五百年年。别人不肯卖自己又学不来技
术的,就没办法了,只能靠底层的工程师工人想土办法,用算术解决方程问题。
r******u
发帖数: 9
3
J85是two stage turbine吗? 还是一级HPT,一级LPT。不知道这东西的点火性能怎样
h****l
发帖数: 7290
4
maybe they do not raise axial speed, raise pressure ration only.
and use better material on turbine blade to sustain higher temperature.

降。
p*********e
发帖数: 32207
5
来自主题: Military2版 - 我认为f-22是一款不合时宜的武器
涡扇发动机的推力与耗油量关系如何?
我只知道gas turbine的耗油量变化区间比较小,
换句话说10%的输出功率跟80%时的比,油耗相差不太大(远不如10%同80%的差距)
换句话说它的economic powerband很窄
具体到涡扇上,如果你将它作为一个热机来考虑,
那么喷油量最大时(不开后燃时)的热机效率,因为进气上的瓶颈,绝不是最高的
(此时的空燃比要比最优值低很多)
换句话说,100%输出同70%输出比,输出提高约43%,那油耗提高要高于这个数字
50%(也就是1.5倍)甚至是个估计的下限.
p*********e
发帖数: 32207
6
来自主题: Military2版 - 如果民航机单靠滑行的话
对了,gas turbine低输出效率小的一个可能原因是
它最后轴输出是靠燃气吹做功涡轮,而这部分低工况仍然要不少的燃料
导致经济性差很多
涡喷/涡扇就不清楚了
t*********r
发帖数: 1822
7
来自主题: Military2版 - 破帽, 小月儿
发动机turbine blade有两点要求 1、轻,2、抗蠕变(高温),我看炮管材料悬
h****l
发帖数: 7290
8
来自主题: Military2版 - 破帽, 小月儿
实际上turbine blade也顾不上轻了。
h****l
发帖数: 7290
9
compressor's blades.
typically, for turbojet
if the force forward is 100%
50% on compressor
30% on combustion chamber
20% on nozzle
while 50% on turbine, but backwards.
so 50% of the forward force forms thrust.
p*********e
发帖数: 32207
10
来自主题: Military2版 - R0110重型燃气轮机到底怎么样
这个也看作为交通动力时是否可以做到长期在近峰值功率上工作了
还是有些方法可以使用的
比如多台并联,巡航跟加速时用不同数量
或者直接弄hybrid gas turbine甚至全电传动,都可以一定程度上改善
船的话空间大,还是有本钱搞这个的
车用相对麻烦一些.
a***e
发帖数: 27968
11
来自主题: Military2版 - 日本的心神,贴几个图片
saw it somwhere,
they got the high-pressure compressor and turbine core from GE.
added low pressure section and put them together under licence
p*r
发帖数: 5516
12
来自主题: Military2版 - Huge blast at Japan nuclear power plant zz
http://www.bbc.co.uk/news/world-12723092 (附图)
The word "meltdown" goes to the heart of the big nuclear question - is
nuclear power safe?
The term is associated in the public mind with the two most notorious
accidents in recent memory - Three Mile Island, in the US, in 1979, and
Chernobyl, in Ukraine, seven years later.
You can think of the core of a Boiling Water Reactor (BWR), such as the ones
at Fukushima Daiichi, as a massive version of the electrical element you
may have in your kettle.
It s... 阅读全帖
f******n
发帖数: 83
13
来自主题: Military2版 - 日本核事故辟谣
现在不知道控制棒是否起作用(我个人认为是起作用的,不然早就整个烧化了)。控制
棒只是停住链式反
应,decay heat就是正常的衰变热,就是停止链式反应后继续散发出来的能量,足够熔
融核材料。
480Mwe的电站,就是1300Mw的热功率,5%很可观了。
核电站三层壳,燃料,一回路(对BWR就包括turbine),安全壳。 所谓熔融就是燃料外
面的金属融化
反射性物质完全暴露出来,decay heat完全可以做到的,熔融以后衰变不受影响,继续
进行,所以还
得不断加水
z******i
发帖数: 5114
14
来自主题: Military2版 - 中国核电的一些信息,信息贴
中国和美国有的是不同的,但是都是尽量少的改动,除非客户需要,比如中国用的
turbine就不同,连中国自己的两个site用的都不同,但是习武是尽量希望是一样的
客户有不同需求,都要另外加钱的

区的各做一份
j****x
发帖数: 943
15
来自主题: Military2版 - 中国核电的一些信息,信息贴
Turbine为什么要不同呢?要是功率一样的话,没有理由花大钱重新设计。如果功率不
同,才有点逻
辑。
T****r
发帖数: 22092
16
来自主题: Military2版 - 日本福岛核电站发现贝塔辐射zz
英语内容:
http://www3.nhk.or.jp/daily/english/24_41.html
2 nuclear plant workers hospitalized
Japan's nuclear safety agency says 2 workers at the Fukushima Daiichi nu
clear power plant were taken to hospital on Thursday after being exposed
to high-level radiation at the Number 3 reactor.
The Nuclear and Industrial Safety Agency says the workers were standing
on a flooded basement floor while working to reconnect power lines in th
e turbine building adjacent to the reactor. As a result, their feet we... 阅读全帖
g**1
发帖数: 10330
17
Thursday's quake damages Onagawa nuclear plant
Tohoku Electric Power Company says Thursday night's strong earthquake
caused water to overflow from spent fuel storage pools at one of its
nuclear power plants.
The power company reported on Friday that water had spilled onto the
floor at all 3 reactors at the Onagawa nuclear power plant in Miyagi
Prefecture. The amount of water spilled was 3.8 liters at the most.
The utility firm also found water leaks at 5 locations in the plant,
including inside ... 阅读全帖
c****g
发帖数: 37081
18
来自主题: Military2版 - 光辉失色之后 zz
晨大雄文。zan.
“光辉”(Tejas)是印度轻型战斗机LCA的正式名称。这是印度从1983年开始研制新型
战斗机,计划取代米格-21。原计划1990年4月首飞,1995年开始投入使用,实际上2001
年1月4日才实现首飞,最新计划于2010年12月投入使用,但至今还没有传出第一个LCA
战斗机中队正式组建成军的消息。传统上,印度对于这样给力的消息是不大会保密的。
然而,对于失色的LCA,印度并不气馁。印度航空发展局 (Aeronautical Development
Agency,简称ADA)在11月18-20日举行的印度2010年度航空大会(Aviation Conclave
2010)上表示,ADA正在向印度政府申请一笔总额达20亿美元的投资,用以研发第5代
的“先进中型战斗机”(advanced medium combat aircraft,简称AMCA)。,ADA主任
兼作战飞机项目主管苏布拉曼雅姆进一步向外界透露,这20亿美元的资金将用于最初2
架AMCA技术验证机和7架 AMCA原型机的研制,预计在2017年首飞。目前AMCA研发的相关
工作已经开始,并且获得了印度政府... 阅读全帖
a***n
发帖数: 1993
19
turbojet的涡轮和压气机的力矩是一样的,gas turbine的压气机力矩大概是涡轮的1/3

样。
R*I
发帖数: 1840
20
来自主题: Military2版 - 为啥动力这么难搞
好像GE是从当年做发电机就开始做turbine,后来航发,风电都在用。这个活可真的是
做了一百年了
s*****V
发帖数: 21731
21
来自主题: Military2版 - AL31TG还是不能断
http://www.ruaviation.com/news/2012/5/31/1037/
Chinese Ministry of Defense acquired Russian engines to the amount of $700
million
中国国防部采购总价值为7亿美元的俄罗斯发动机
Russian Aviaton » Thursday May 31, 2012 19:38 MSK
Chinese Ministry of Defense acquired 140 AL-31F engines through intermediary
of Rosoboronexport in early 2012, Lenta.ru reports with reference to
Vedomosti.
2012年初,140部AL-31F
According to the source, close to the Russian export state company, the
amount of the contract is about $700 million.... 阅读全帖
p*********e
发帖数: 32207
22
燃料泵消耗多少功率?turbofan的涡轮消耗多少功率?
这两个从相对尺寸/绝对尺寸,消耗功率上不在一个量级
另外没有涡轮燃料泵你可以用别的类型的燃料泵,或许性能不如但至少飞得起来
更不用提固体燃料火箭发动机
没有turbine的turbofan压根不能叫做turbofan
s*********0
发帖数: 2045
23
像咱们中国,就算造好了也不说。三锅就忙不急得把截几张COMSOL图来做ppt了。
而且以前造过的最大的船才7000吨,这回造个4万吨First Time非常骄傲地样子:
“to realise the dream of being a builder's Navy through indigenisation, DND
has successfully designed over 17 different classes of warships, to which
around 90 ships have already been built within the country. The Delhi class
destroyers, with a displacement of about 7000 tonnes, were the biggest
warships designed by DND so far. Designing of the Vikrant, at almost 40,000
tonnes speaks of the maturing of the capab... 阅读全帖
g**1
发帖数: 10330
24
来自主题: Military2版 - 三哥航母用4台LM2500ZT
http://www.marinelink.com/news/aircraft-carrier-indias360717.as
GE Powers India’s First Aircraft Carrier
Posted by Eric HaunThursday, November 07, 2013, 2:26 PM
File Indian Navy Aircraft Carrier (Photo: GE)
Indian Navy Aircraft Carrier (Photo: GE)
GE Marine, headquartered in Cincinnati, Ohio, announced that four GE LM2500
gas turbines will soon power the Indian Navy’s INS Vikrant, providing 80
megawatts for the country’s first indigenous aircraft carrier.
c****3
发帖数: 6038
25
你为什么要引用卡诺定理呢?
使用卡诺定理得出的结论刚好相反啊
turbine热源温度高 相对活塞机械能转化效率和废热温度同步提升吧
你真的是学物理的?
c****3
发帖数: 6038
26
我一直觉得物理学家最大的caveat在于知识面不够宽
知识面大小直接正比于你专业知识的发挥效果
QED君你物理直觉不错 分析也算是靠谱
可是在这个问题上却没抓住关键 对热力学牵强附会了
这是因为你的知识面没有覆盖到关键信息
今天我这个虽学物理
可是连PhD都没资格做的GPA 2.6三脚猫物理爱好者小留就斗胆献丑
给机智的QED君科普一下
希望QED君以后做人要么谦虚一些 要么不断学习扩大自己的知识面
特别是工程常识 以后说话前多想想
不要给我们搞物理的丢人
特别是别在聪明的萌妹子面前丢人 萌妹子要是发现了
不会说什么 可是我们物理学家的形象就全毁了
QED君你知识面比今天大得越多 以后就可以越狂
以致最后可能达到费曼的程度 想搞多少妹子都可以
QED君的知识面可不能跟菌斑众将比
从本帖看菌斑众将在这个问题上没有一个比QED君更靠谱的
回到楼主的问题"为什么有些大运输机是螺旋桨驱动的"
要回答这个问题 得知道一个关键事实
现代大型飞机 没一个不是我们俗称的喷气机 全部用的是gas turbine
也就是涡轮机
最后的大型活塞机 到B-29 DC-3就绝嗣了
现代活塞螺旋桨飞机 全部是小型... 阅读全帖
a***e
发帖数: 27968
27
尼玛透平是turbine的音译?

中大2014-04-12 10:15:14 更多 749 关键字 >> 中国大飞机航空发动机罗尔斯·罗
伊斯劳斯莱斯无锡透平叶片中
p*********e
发帖数: 32207
28
来自主题: Military2版 - 谁知道F22有什么毛病?
http://www.sukhoi.org/eng/planes/military/Su-35/
"
In terms of engineering, the engines are substantially modified AL-31F
production engines employing fifth-generation technologies. They use a new
fan, new high and low pressure turbines, and a new digital control system. A
provision is made for using a vectored thrust nozzle. The modernization has
increased the engine special mode thrust by 16%, up to 14,500 kgf. In the
maximum burner-free mode it reaches 8,800 kgf.
"
且不说航电上的升级,仅考虑动力,117s发动机相对AL... 阅读全帖
a***e
发帖数: 27968
29
at 1000m/s, 30sec will cover a 30km range.
the radar at most need to work for 1min.
at 30KW, that is about 500WH power needed.
the battery of your UPS running typical 8AH and 12V or near 100WH.
a typical car batter give you about 50AH and 12V, that is 600WH.
doesn't sound very difficult at all.
when air plane lost power, it use a
wind turbine to generate power needed for control.
not a really big deal.
finding a target like Carrier is not a big deal.
if Sat update the position at 200km away,
onl... 阅读全帖

发帖数: 1
30
来自主题: Military2版 - 中途岛级航空母舰
中途岛级航空母舰曾在美国海军跨越数个历史时期服役,有“三朝元老”之称。该级航
母共有CVB-41中途岛号、CVB-42罗斯福号、CVB-43珊瑚海号三艘,在二战期间建造,而
后经历了喷气时代的改装,直到海湾战争、冷战结束仍服役一段时间,在历经近半个世
纪的风风雨雨之后,陆续退出历史舞台。
中途岛级是美国海军历史上服役期最长的舰艇之一。首舰中途岛号早在1945年下水服役
,在1991年参与沙漠风暴行动后,在1992年退役。
建造者 纽波特纽斯造船厂
纽约海军工厂
使用者 美国
前型 埃塞克斯级航空母舰
次型 福莱斯特级航空母舰
服役 10 September 1945 – 11 April 1992
规划 6
完成 3
保存 中途岛号航空母舰博物馆
技术数据
排水量 45,000 tons
全长 968英尺(295米)
全宽 113英尺(34米)
吃水 33英尺(10米)
Steam turbines
212,000 shp
速度 33节(61千米每小时)
乘员 4,104
... 阅读全帖
k******a
发帖数: 2436
31
water turbine/twister 需要重新设计。你这么说两句就解决了?

发帖数: 1
32
VTOL项目总师Kevin Renshaw; F35垂直起降技术(3BSD)来源于通用的Model 200,与
雅克141无关
F-35B Lightning II Three-Bearing Swivel Nozzle
By Kevin Renshaw Posted 12 August 2014
The Convair Model 200 was proposed in June 1972 to respond to the US Navy
request for designs for a fighter/attack aircraft for the sea control ships.
The VTOL aircraft would have used a PW401 engine with an afterburning 3BSD
plus twin Allison XJ99 lift engines located behind the cockpit for added
vertical lift forward of the center of gravity to b... 阅读全帖
E*V
发帖数: 17544
33
The UN nuclear agency said it had seen releases of steam and water
indicating that North Korea may be seeking to restart a reactor that experts
say would be capable of making plutonium for atomic bombs.
North Korea announced in April that it would revive its aged research
reactor at the Yongbyon nuclear complex but said it was seeking a deterrent
capacity.
Yukiya Amano, director general of the International Atomic Energy Agency,
said on Thursday the Vienna-based IAEA continued to monitor develop... 阅读全帖
a*******a
发帖数: 245
34
来自主题: USANews版 - 制造业是王道,INSOURCING
While the U.S. unemployment rate hangs high above 8%, manufacturing is one
sector of the American economy that has seen substantial jobs growth over
the last few years.
President Barack Obama said as much during his interview with 60 Minutes
Sunday:
"The month I was sworn into office, we were losing eight hundred
thousand jobs a month. We ultimately would lose nine million jobs during the
height of that Great Recession. We came in, made some tough decisions....
And because of that we've ... 阅读全帖
l****z
发帖数: 29846
35
来自主题: USANews版 - Global warming stopped 16 years ago
Global warming stopped 16 years ago, reveals Met Office report quietly
released... and here is the chart to prove it
The figures reveal that from the beginning of 1997 until August 2012
there was no discernible rise in aggregate global temperatures
This means that the ‘pause’ in global warming has now lasted for about
the same time as the previous period when temperatures rose, 1980 to 1996
By David Rose
PUBLISHED: 16:42 EST, 13 October 2012 | UPDATED: 20:21 EST, 13 October 2012

The ... 阅读全帖
o******y
发帖数: 233
36
西门子纯属自找。
trough技术美国60/70年代就建站运行了,稳定运行到现在,建在美西的6,7个光热电
站到今天运营还是不错的,都属于DOE/FPL旗下的电站。但是刨除国家补助这种技术能
不能挣钱,都40/50年了还看不出来么。
如果不是西门子当时傻了,就是故意给中国购买作中介然后趁机配合推销光热电站必须
用的gas turbine等各种配套东西。
a*******r
发帖数: 525
37
来自主题: USANews版 - 禁枪的后果
58楼turbine君,别人参加讨论是带着建议和与人为善的诚意。
你老兄可好,左手拎着粪桶,右手捏着砖头来了。
a*******r
发帖数: 525
38
来自主题: USANews版 - 禁枪的后果
turbine兄,这是个hot topic. 一时激动,我理解。说开了就好,请别放在心上了。
这么多初开的小花,就这样不幸地凋谢了,谁能不难过?
其实大家忽略了几个要点。第一,很多人恐怕没有领会“坏人”的全部含义;第二,很
多人把公民的拥枪权利误会成了他们每一个人自己。当我们mingle在合法用枪的"大众
“里,你就已经享有了禁枪的情况下不可能有的安全度。和你个人佩不佩枪,对国家整
体就是个统计学的概念。就像你一个投票虽然决定不了谁当选总统,你能说选举没有意
义吗?
有报道Newtown的学生家长们事件后,去枪店购枪的人数大幅增长。这不说明问题吗?
a*******r
发帖数: 525
39
来自主题: USANews版 - 禁枪的后果
turbine兄,人人意见一样反而奇怪。
我愿意跟你打赌:二十年后你有90%可能理解我的立场;
否则,八十年后我支持你的观点。:)
l****z
发帖数: 29846
40
By James Delingpole Environment Last updated: September 25th, 2013
On Friday the Intergovernmental Panel on Climate Change delivers its latest
verdict on the state of man-made global warming. Though the details are a
secret, one thing is clear: the version of events you will see and hear in
much of the media, especially from partis pris organisations like the BBC,
will be the opposite of what the IPCC’s Fifth Assessment Report actually
says.
Already we have had a taste of the nonsense to come: a... 阅读全帖
C*******r
发帖数: 10345
41
http://www.huffingtonpost.com/van-winkles/winter-is-coming-scie
Global warming快寿终正寝了,现在偷换概念成了climate change,尼玛地球历史上有
时间climate是不在change的吗?
Winter is Coming: Scientist Says Sun Will Nod Off in 15 Years
Might want to start stockpiling those down jackets: The sun could nod off by
2030, triggering what scientists are describing as a “mini ice age.”
Professor Vlentina Zharkova of Northumbira University presented the frigid
findings at the National Astronomy Meeting in Llandudno, Wales. Modern
technol... 阅读全帖
l****z
发帖数: 29846
42
Meddling Renewable Energy Standards Distort Energy Markets, Raise Prices
By Joe Nichols | August 10, 2015 | 3:06 PM EDT
Environmental groups scorn state leaders who dare question the sanctity of
renewable energy mandates, commonly known as “renewables portfolio
standards” or RPS. Such scorn is misplaced and state leaders should
continue to reconsider the wisdom and value of these mandates.
RPS laws typically require electric utilities to purchase specific
quantities of electricity from renewabl... 阅读全帖
c***n
发帖数: 1034
43
来自主题: USANews版 - How Bernie pays for his proposals
https://berniesanders.com/issues/how-bernie-pays-for-his-proposals/
不少人不断地一遍一遍地说Bernie没有具体的计划来为他的政策付款,这里有详细的解
释。
这个问题是Corporate Media为了自己的利益故意装不知道(或者有些作者自愿洗脑真
不知道,或者被心理舆论压制了而不敢说)创造出来的。
因为原文是表格,下面贴的格式乱了,直接看上面的链接吧。
Plan Payment
Rebuild America Act: Sen. Sanders has proposed a $1 trillion plan to rebuild
our crumbling infrastructure and put 13 million Americans to work. Paid
for by making corporations pay taxes on all of the “profits” they have
shifted to the Cayman Islands and other offshore... 阅读全帖
x******s
发帖数: 47
44
来自主题: USANews版 - 床铺要救煤炭业
环境当然重要,也应该反映在成本上。各位不想要天朝的雾霾吧?

cycle
turbine
t**********r
发帖数: 882
45
来自主题: USANews版 - 床铺要救煤炭业
If you read some of the criticism on the calculation, you will realize there
is a huge problem with it. Production cost is only part of the story. The
bigger issue with wind is that it is not stable. Sometimes you have strong
wind and a lot of output and other times you have no wind at all. Since you
can't save electricity with the current battery technology, you need to have
a lot of traditional generators to backup the wind turbines. That is a
pretty expensive proposition.
g********2
发帖数: 6571
46
Donald Trump’s New York Times Interview: Full Transcript
By THE NEW YORK TIMESNOV. 23, 2016
President-elect Donald J. Trump during a meeting at The New York Times’s
offices in Manhattan on Tuesday.
Following is a transcript of President-elect Donald J. Trump’s interview on
Tuesday with reporters, editors and opinion columnists from The New York
Times. The transcription was prepared by Liam Stack, Jonah Engel Bromwich,
Karen Workman and Tim Herrera of The Times.
ARTHUR SULZBERGER Jr., publisher o... 阅读全帖

发帖数: 1
47
尼古拉·特斯拉 (塞尔维亚裔美籍科学家) 编辑
尼古拉·特斯拉(Nikola Tesla,1856年7月10日~1943年1月7日),塞尔维亚裔美籍发
明家、机械工程师、电气工程师。他被认为是电力商业化的重要推动者之一,并因主持
设计了现代交流电系统而最为人知。在迈克尔·法拉第发现的电磁场理论的基础上,特
斯拉在电磁场领域有着多项革命性的发明。他的多项相关专利以及电磁学的理论研究工
作是现代的无线通信和无线电的基石。[1-2]
中文名 尼古拉·特斯拉 外文名 Nikola Tesla、Никола Тесла 别 名
尼科·特斯拉(Niko Tesla) 国 籍 奥匈帝国(后移民美国) 民 族 塞尔维亚
族(南斯拉夫人) 出生地 克罗地亚 出生日期 1856年7月10日 逝世日期 1943年1月7
日 职 业 发明家、机械工程师、电气工程师 毕业院校 格拉茨理工大学(实际未毕
业) 信 仰 塞尔维亚东正教 主要成就 交流电系统、无线电系统、无线电能传输、
雷达、放大发射机 代表作品 《My Inventions》《The Dynamic Theory of... 阅读全帖
c*c
发帖数: 2983
48
why not?
Clean energy creates more jobs than coal miners now, wind turbine, solar
panels, fuel efficient cars, etc...
h******k
发帖数: 15372
49
今天在高速上看到一个宣传广告牌,上面写着“Wind turbines kill millions of
birds”,这是左派还右派?动物保护组织应该是左派,可是他们又反对风力发电低碳
能源,怎么在左派里面混呢?
t**********r
发帖数: 882
50
一定不是右派,因为他们既恨wind turbine,又恨birds,呵呵
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