共查询到20条相似文献,搜索用时 406 毫秒
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美国和独联体有意合作研制核火箭开发核动力航天运输系统所需的技术是实现载人登月和火星探索的一条很有前途的途径。独联体已经建立了可用于这种飞行任务的一种热核火箭方案,并建设了方案试验和评定所需的设施。鉴于独联体在这方面已进行了大量卓有成效的工作,而美国又... 相似文献
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2010年,奥巴马将美国载人航天计划的指挥棒指向了火星。已经在档案馆中沉睡了40年的一个伟大设计——核火箭发动机,又看到了重生的希望。在半个多世纪前的载人航天黄金时代,它因人类的火星远征而生,又随着时代潮流的转向而归于沉寂。核火箭发动机的命运就是这样的起伏跌宕。 相似文献
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我国大型天文与空间望远镜展望 总被引:2,自引:0,他引:2
开发利用宇宙,探索人类能否在月球、火星等星体上进行采矿、无重力和无污染生产,建立无引力宇航发射台和无大气湍流天文观测站;能否利用天体剧烈活动所爆发的巨大能量并研究其能量发生机制,为人类提供新的能源;探索宇宙中是否有生命体及人类能否在宇宙中长期生活;仔细研究天体的物质构成和形状大小、化学物理性质及其坐标、运动,进一步发现和研究星系与恒星的形成与演变,研究地球的变 相似文献
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二、当今宇宙探测重又火爆航天技术突飞猛进的发展为宇宙探测提供了基础和条件。同时,世界各国的科技界也逐步将探索宇宙奥秘、开发利用宇宙资源、探究人类进入新的活动疆域的途径等,列入科技发展的新议程,宇宙探测重又火爆,宇宙探测在发展知识经济时代的高新技术产业... 相似文献
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20世纪中叶,航天技术 兴起,人类继在地球二维平面探索之后,开启了对地球的三维立体探索,并把目光投向了浩瀚的宇宙。宇宙是广袤的, 相似文献
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过氧化氢发动机试验技术现状 总被引:3,自引:0,他引:3
综述了过氧化氢在火箭推进技术中的发展和应用,概括了国内外在这一领域的最新进展,提出了发展过氧化氢火箭发动机对航天推进与宇宙探索都具有现实意义。 相似文献
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谭邦治 《中国航天(英文版)》1999,(9)
三、中国应在宇宙探测中有所作为 (一)宇宙探测与研究关系到全人类,也关系到中国探索宇宙奥秘,开发宇宙资源,探究人类进驻新疆域的可能性与途径,在知识经济时代发挥航天高新技术产业的支柱作用,这是航天科技工业肩负的四大艰 相似文献
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Since September 2001, NASA's In-Space Propulsion Technology (ISPT) program has been developing technologies for lowering the cost of planetary science missions. Recently completed is the high-temperature Advanced Material Bipropellant Rocket (AMBR) engine providing higher performance for lower cost. Two other cost saving technologies nearing completion are the NEXT ion thruster and the Aerocapture technology project. Under development are several technologies for low-cost sample return missions. These include a low-cost Hall-effect thruster (HIVHAC) which will be completed in 2011, light-weight propellant tanks, and a Multi-Mission Earth Entry Vehicle (MMEEV). This paper will discuss the status of the technology development, the cost savings or performance benefits, and applicability of these in-space propulsion technologies to NASA's future Discovery, and New Frontiers missions, as well as their relevance for sample return missions. 相似文献
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Mission to Mars using integrated propulsion concepts: considerations, opportunities, and strategies 总被引:1,自引:0,他引:1
The aim of this paper is to evaluate the feasibility of a mission to Mars using the Integrated Propulsion Systems (IPS) which means to couple Nuclear-MPD-ISPU propulsion systems. In particular both mission analysis and propulsion aspects are analyzed together with technological aspects. Identifying possible mission scenarios will lead to the study of possible strategies for Mars Exploration and also of methods for reducing cost. As regard to IPS, the coupling between Nuclear Propulsion (Rubbia's engine) and Superconductive MPD propulsion is considered for the Earth-Mars trajectories: major emphasis is given to the advantages of such a system. The In Situ Resource Utilization (ISRU) concerns on-Mars operations; In Situ Propellant Utilization (ISPU) is foreseen particularly for LOX-CH4 engines for Mars Ascent Vehicles and this possibility is analyzed from a technological point of view. Tether Systems are also considered during interplanetary trajectories and as space elevators on Mars orbit. Finally strategic considerations associated to this mission are considered also. 相似文献
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深空探测作为我国航天领域未来的重要任务之一,需要性能更高的推进系统提供动力。核热推进系统具有高比冲、大推力、长运行寿命、可重复启动等优点,可为未来深空探测任务提供可靠的动力支撑。经过了60多年的发展,核热推进固态堆芯燃料元件被研制出了多种类型,如六棱柱石墨基燃料元件、扭曲条带燃料元件、六棱柱金属陶瓷燃料元件、球形包覆颗粒燃料元件、MITEE型燃料元件、SLHC型燃料元件、Grooved Ring型燃料元件等。总结归纳了核热推进固态堆芯燃料元件的发展状况,提出了发展核热推进固态堆芯燃料元件的关键技术,可为我国核热推进系统燃料元件的研制提供借鉴。 相似文献
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Those who fear development of nuclear propulsion for space travel forget that considerable work on it has already been done, starting in the 1950s, and that the concept of a nuclear rocket was safely and successfully tested in the 1960s. This article describes the history of the US Nuclear Engine for Rocket Vehicle Application programme, with technical details of its development. Although funding for the programme ceased in the 1970s, there is no reason to suppose that the concept would not work today. 相似文献
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Mono Shimizu Katsuya Itoh Hitoshi SatoTadayuki FujiiKen-ichi Okamoto Shigehiko TakaokaKotaro ShiinaYoshihiro Nakamura 《Acta Astronautica》1999,44(7-12):345-351
One potentially attractive propulsion concept offering significant payload gains for orbit transfer from LEO to higher orbits, station keeping and attitude control of spacecraft is thermal propulsion using light gas (typically hydrogen) as propellant and various kinds of heat energy. Solar Thermal Propulsion (STP) is a typical thermal propulsion with high Isp (500 – 1,000 s) in an appropriate thrust magnitude range and provides possibly much less space pollution than conventional chemical propulsion.
This paper presents the test results of a 30 mm dia. (medium-sized) windowless type of single crystal Mo thruster for orbit transfer of 50 kg class microsatellites. The cavity dia. is 20 mm, double the size of the previous model, and can apply to a primary solar reflector of up to 3.5 m dia., which is the maximum size containable in the H-II rocket fairing without segmentation. The performed mission analyses indicate that this size of STP is suitable to orbit transfer of 50 kg class microsatellites, such as LEO to GEO, or only multiple apogee kicks from GTO to GEO or deep space missions. 相似文献
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Steven D. Howe 《Space Policy》2001,17(4):275-283
The potential benefits to humankind of space exploration are tremendous. Space is not only the final frontier but is also the next marketplace. The orbital space above Earth offers tremendous opportunities for both strategic assets and commercial development. The critical obstacle retarding the use of the space around the Earth is the lack of low cost access to orbit. Further out, the next giant leap for mankind will be the human exploration of Mars. Almost certainly within the next 30 years, a human crew will brave the isolation, the radiation, and the lack of gravity to walk on and explore the Red planet. Both of these missions will change the outlook and perspective of every human being on the planet. However, these missions are expensive and extremely difficult. Chemical propulsion has demonstrated an inability to achieve orbit cheaply and is a very high-risk option to accomplish the Mars mission. An alternative solution is to develop a high performance propulsion system. Nuclear propulsion has the potential to be such a system. The question will be whether humanity is willing to take on the challenge. 相似文献