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[专题专项] 印度的可重复使用载具技术验证机:RLV-TD成功进行亚轨道测试

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cmj9808 发表于 2009-2-22 18:31 | 显示全部楼层
从16#的展板上看RLV-TD用的是冲压或冲压-火箭发动机,可1#的风洞照片没有看到进气口,且再入大气层时这个进气口如何处理?
zhangwee 发表于 2009-2-22 20:47 | 显示全部楼层
#1估计是不带冲压-火箭发动机的实验机吧,印度自己能搞好那个发动机?
古风居士 发表于 2009-2-22 21:11 | 显示全部楼层
印度人心也太急了,载人飞船还没影子呢,就开始搞可重复航天载具了。
头像被屏蔽
limaokkk 发表于 2009-2-22 22:19 | 显示全部楼层
提示: 作者被禁止或删除 内容自动屏蔽
 楼主| jingyan66 发表于 2009-4-2 18:10 | 显示全部楼层

印度的航天飞机已经成形,验证机将在一年内试飞

An Indian space shuttle takes shape

Wednesday, Apr 01, 2009  Hindu

T.S. Subramanian


Reusable Launch Vehicle-Technology Demonstrator to fly within a year  

2009040161821101.jpg
An engineering model of the Indian space shuttle called “Reusable Launch Vehicle-Technology Demonstrator” at the Vikram Sarabhai Space Centre, Thiruvananthapuram.

CHENNAI: An Indian version of the space shuttle will be test-flown from the spaceport at Sriharikota in a year’s time. The Reusable Launch Vehicle-Technology Demonstrator (RLV-TD), as it is called, will be a combination rocket-aircraft: the aircraft with a winged body, which is the RLV, will sit vertically on the rocket.

The engineering model of the aircraft is ready at the Vikram Sarabhai Space Centre (VSSC) in Thiruvananthapuram. The first stage of the Satellite Launch Vehicle-3, flown in the early 1980s, will form the booster rocket. Weighing nine tonnes, it is called S-9.

After it takes off like a rocket, the booster will release the unmanned aircraft, which will go into space. At the end of the mission, the aircraft will land in the sea.

K. Radhakrishnan, Director, VSSC, said in an interview: “The next year we expect the prototype of the RLV-TD to be ready for flight-testing. This will be a milestone for ISRO.” The RLV “will open a new dimension in the launch vehicle technology and transportation system of ISRO.”

According to Dr. Radhakrishnan, ground testing of the booster rocket was done at Sriharikota in December 2008.

S. Ramakrishnan, Director (Projects), VSSC, explained how the rocket-aircraft would look: “The aircraft will stand over the rocket, nose-tip up, and its tail will be interfaced with the rocket. In other words, the entire RLV will stand vertically on top of the booster.” The engineering model of the prototype RLV was ready at the VSSC. “It will undergo various structural and load tests,” Mr. Ramakrishnan said.

The booster rocket will take the RLV to a specific altitude, release the RLV and fall into the sea. On re-entry into the earth’s atmosphere, the RLV will land in the sea, to be recovered.

“Re-entry, descent and recovery are the three issues which we are trying to understand,” Mr. Ramakrishnan said. But in the first trial-flight in 2010, the RLV will not be recovered from sea because it will not be cost-effective to do so. “But we will get the data on the re-entry, deceleration and return from the telemetry.”

There were several issues that the ISRO was trying to understand in the mission, Dr. Radhakrishnan said. These included the aerodynamics of the RLV, compared to the rocket, and the controllability of the vehicle. “The control system must be fast-acting. That is the basic challenge. The digital auto-pilot is important for the ascent phase and the descent phase.”

The third important challenge was the heat generated when the RLV re-entered the atmosphere. Dr. Radhakrishnan said: “You need to have hot structures [which can withstand the re-entry heat]… Today, we have a handle on the materials.”

The ISRO had a long way to go before it could build an operational RLV, he said. “This is the first TD towards that.”
shaolin1254 发表于 2009-4-2 21:21 | 显示全部楼层
牛叉呀,三哥的又要放大卫星了。。。。。。。
speed 发表于 2009-4-4 10:28 | 显示全部楼层
印度版航天飞机的工程模型建成

[据印度日报2009年4月1日报道]  印度版的航天飞机将于一年内在Sriharikota航天中心进行飞行测试。可复用运载火箭技术演示器 (RLV-TD)就像它的名字一样,将是火箭和飞机的联合体:飞机和带翼的机体(它就是可复用运载火箭,RLV),将垂直坐在火箭上。

      飞机的工程模型已经在Vikram Sarabhai太空中心(VSSC) 准备完毕。在上世纪八十年代初就开始飞行的“卫星运载火箭”-3第一级,将用作助推火箭。它重9吨,被称作S-9。

      像火箭一样起飞后,助推火箭将携带RLV飞到特定的高度,释放RLV后落入大海。飞机最终进入太空。在任务结束重返地球大气层后,飞机将在海上降落,进行回收。

      VSSC主任K. Radhakrishnan说,“明年我们希望RLV-TD的原型准备好进行飞行测试。这将是ISRO的里程碑。”“可复用运载火箭将使ISRO的运载火箭技术和运输系统开创新的天地”。

      据Radhakrishnan介绍,助推火箭的地面测试已经在2008年12月完成。他说,“飞机将站在火箭上,鼻尖冲上,而它的尾部将与火箭相连。换句话说,整个RLV将垂直立于助推器的顶部。”RLV原型机的工程模型已经在VSSC就绪。“它将经历一系列的结构和载荷测试。”

      “再入、降落和回收是三个我们着力解决的问题”。但因成本问题,2010年的首次试验飞行,将不会从海上回收RLV。“但是通过遥测,将获得再入、减速和返回的相关数据。”

      还有几个问题是ISRO试图研究的,包括:与火箭相比,RLV的空气动力学是怎样的;以及飞行器的控制能力。“控制系统必须可快速执行。这是最基本的挑战。数字式的自动驾驶仪对于上升阶段和下降阶段来说都很重要。”第三个重要的挑战是RLV再入大气层时产生的热量。
      ISRO想要建造可运行的RLV还有很长的路要走,首个演示器只是迈出的第一步。(中国航天工程咨询中心 谢慧敏 陈菲)
 楼主| jingyan66 发表于 2009-4-5 09:23 | 显示全部楼层

印度的可重复使用载具技术验证机RLV-TD明年初试飞

India plans to test space shuttle in next 12 months


India has developed a space shuttle and plans to launch a prototype into the Earth's orbit in the next 12 months, officials said on Thursday.

By Dean Nelson in New Delhi
Last Updated: 6:36PM BST 02 Apr 2009

The disclosure marks yet another giant leap for India's space programme following last year's successful lunar mission, Chandrayaan 1, and a significant step towards India becoming a major player in space transportation.

It hopes the shuttle will enable India to offer cut-price satellite launches and become a dominant player in the industry. Last night officials said if successful the shuttle may, in time, be used for other transport uses, but its main purpose now is to "reduce the cost of access to space."

Scientists at the Indian Space Research Organisation successfully tested the booster rocket which will fire the shuttle into space in December last year.

The Indian shuttle, currently known by its technical name, Reusable Launch Vehicle – Technology Demonstrator – will now undergo a number of structure and load tests before it takes its first test flight early next year.

It bears a strong resemblance to the American Challenger shuttle, with a tube-shaped body and triangular wings, and sits vertically, nose up, on top of its launch rocket.

ISRO spokesman Mr S. Satish on Thursday night said that, if successful, the demonstrator would "prove the technology for the development of a space shuttle," but it would be a further four or five years before the country would be ready for a commercial launch.

Next year's test flight, which will be unmanned and remote-controlled, will take off from a test site in southern India, blasting beyond the Earth's atmosphere into space before it re-enters and lands in the Indian Ocean.

The flight will test the aerodynamics of the shuttle, the remote control system and its ability to withstand the heat generated when it re-enters the Earth's atmosphere.

"The cost of access to space has to be reduced, and this [test-flight] will prove India can build a space shuttle within four or five years," said Mr Satish.
 楼主| jingyan66 发表于 2009-4-7 18:16 | 显示全部楼层

可重复使用载具技术验证机RLV-TD模型

本帖最后由 jingyan66 于 2009-4-10 13:24 编辑

rlvtdlauncherimg0032pr4.jpg
shaolin1254 发表于 2009-4-7 19:43 | 显示全部楼层
真要是这个模式发射,那发射塔也要改造
cmj9808 发表于 2009-4-7 21:16 | 显示全部楼层
PSLV的发射架应该就行
hkhtg090201 发表于 2009-4-8 07:13 | 显示全部楼层
飞机放在箭头上,以前见过图片,有意思,还没人实际发射过吧?
cmj9808 发表于 2009-4-8 10:59 | 显示全部楼层
 楼主| jingyan66 发表于 2009-5-12 08:54 | 显示全部楼层

未来10~15年内,印度将发射可重复使用的载具

ISRO to launch re-usable rockets within next 10 to 15 years


Monday, May 11, 2009 : 2200 Hrs       Hindu

Hyderabad (PTI) Indian Space Research Organisation(ISRO) is working on a plan to launch re-usable rockets within next 10 to 15 years that will take off from the ground to orbit and return just like any aircraft carrying people and payload, said G Madhvan Nair, Chairman of Indian Space Research Organization(ISRO).

"ISRO will launch these re-usable rockets within next 10 to 15 years," Nair told reporters on the sidelines of AV Rama Rao Technology Award Lecture on Advances in Space Materials on the occasion of National Technology Day celebrations at IICT here on Monday.

Mr. Nair said the single stage orbit vehicle will take off from ground carrying people or payload and return.

"The concept will be like space shuttle but with a different configuration. For this ISRO is working required technology," he said.

He said ISRO is tuned to developing programmes to solve the people's problems like better communication system, imaging planet earth, improving resolution capability, improving radar composition, developing technology for satellites, and forecasting weather that will give information to villagers of the type of soil, ocean and fishing activity.
qiugb 发表于 2009-5-12 09:04 | 显示全部楼层
想不想是一回事,能不能还是另一回事呢
snowtiger 发表于 2009-5-12 12:48 | 显示全部楼层
既然升力返回,为啥还要海上溅落?!直接搞个起落架然后陆地机场跑道着陆不行么?!三锅又在不可理喻了。。。。。
话说回来本人的看法是航天飞机和助推器以及外挂燃料箱几乎水平并列的设计才是哥伦比亚事故的罪魁祸首。其实升力返回跑道着陆的思路本身是非常好的。很可惜使神项目多年没有修成正果,而美俄下一代跨大气层复用载具最后都选择了飞船路线。看来,最终第一个实用化的人货分离,运载火箭发射,升力返回,跑道着陆的小航天飞机最终将是我国921三期跨大气层复用载具中国小航天飞机万岁
cmj9808 发表于 2009-5-12 13:06 | 显示全部楼层
这只是验证机的一次前期试验飞行,类似于HYFLEX-J1
shh 发表于 2009-5-12 15:44 | 显示全部楼层
自动着陆,导航等技术验证有时候会有其他的验证机,比如日本就有。这个如上面cmj兄所说,主要是进行较高速度下的气动和热动的研究。省略自动着陆等项目可以减少试验的开销和风险。不过印度的这次只有M6,速度不是很高,只是他们的第一步。

美苏对下一代飞船的选择对我们会有不小的影响。我个人猜测我们不见得会真的上一个型号。技术验证是肯定的。这个升力返回对目前的天地往返系统来说并没有特别显著的优点。而且小航天飞机的防热比大航天飞机要更难一些。
snowtiger 发表于 2009-5-12 16:30 | 显示全部楼层
...........升力返回省掉了兴师动众地清理个着陆场出来,已经很节省了吧?而且整个航天飞机机体全部都是可以复用的,连猎户座的一次性大底也省了。至于防热,SHH老大的意思是不是小航天飞机需要比美国那个鼻锥更大的碳碳复材整体成型构件?这个也许是个难关,不过参考下快船和使神,个人认为未必解决不了。如果是设计方面的问题,还有劳SHH老大在不涉密的前提下科普下可否?总之个人非常看好小航天飞机
shaolin1254 发表于 2009-5-12 19:01 | 显示全部楼层
现在直接山寨暴风雪的话,能满足需要么。。。。。。。。
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