共查询到20条相似文献,搜索用时 463 毫秒
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考虑到月球探测器着陆过程变推力发动机工作可能引发羽流热效应,通过差分求解N S方程与直接模拟蒙特卡洛(DSMC)耦合的方法,针对探测器变推力发动机羽流的连续流区与稀薄流区进行了数值模拟,获得了着陆过程不同状态探测器表面的羽流气动热流密度分布,分析了探测器在不同高度及坡度受到的羽流热效应,研究了探测器因落月惯性与发动机延时拖尾等特殊工况羽流气动热的影响程度。数值模拟结果表明,探测器受到的羽流气动热影响总体随着发动机出口与月面间距离减小而急剧增强,随着距离减小至0.434 m,热流密度最大值为429 kW/m 2 ,而且月面坡度对羽流热效应有减弱作用。研究结果可为探测器关机策略的制定提供支撑,为探测器关键部位的热防护提供输入,为探测器整体的设计优化提供服务。 相似文献
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文章针对未来有人参与的月球探测任务,首先开展了月球表面环境地面模拟试验验证需求分析,归纳总结了国内外技术发展现状。然后,提出并分析了载人月球探测地面模拟试验需重点研究的关键技术:真空热环境下月面移动式多体低重力模拟技术;复杂月面环境高精度热流模拟技术;大容量布尘条件下超高真空获得与保持技术;月面辐射与月尘环境模拟技术;月尘防护效能量化评估技术;月面综合环境试验验证技术等。最后,给出了面向载人月球探测的月面环境模拟试验技术研究总体方案,并对月面环境模拟试验技术的发展目标进行了展望。 相似文献
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Electric and thermal power have to be available at the base site on the lunar surface before the first lunar crew arrives. Unlimited solar energy is available during the lunar day, but this must be stored for use during the lunar night unless nuclear energy systems are available. State-of-the-art candidate systems are reviewed and the production of solar cells on the moon is discussed. Various options for developing a lunar power plant are proposed. These must be simulated and optimized in a real life-cycle systems scenario to provide operations and cost data essential for choosing a strategy. 相似文献
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Electric and thermal power have to be available at the base site on the lunar surface before the first lunar crew arrives. Unlimited solar energy is available during the lunar day, but this must be stored for use during the lunar night unless nuclear energy systems are available. State-of-the-art candidate systems are reviewed and the production of solar cells on the moon is discussed. Various options for developing a lunar power plant are proposed. These must be simulated and optimized in a real lifecycle systems scenario to provide operations and cost data essential for choosing a strategy. 相似文献
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T. Hashimoto T. HoshinoS. Tanaka H. OtakeM. Otsuki S. WakabayashiH. Morimoto K. Masuda 《Acta Astronautica》2014
The Japan Aerospace Exploration Agency (JAXA) views the lunar lander SELENE-2 as the successor to the SELENE mission. In this presentation, the mission objectives of SELENE-2 are shown together with the present design status of the spacecraft. JAXA launched the Kaguya (SELENE) lunar orbiter in September 2007, and the spacecraft observed the Moon and a couple of small satellites using 15 instruments. As the next step in lunar exploration, the lunar lander SELENE-2 is being considered. SELENE-2 will land on the lunar surface and perform in-situ scientific observations, environmental investigations, and research for future lunar utilization including human activity. At the same time, it will demonstrate key technologies for lunar and planetary exploration such as precise and safe landing, surface mobility, and overnight survival. The lander will carry laser altimeters, image sensors, and landing radars for precise and safe landing. Landing legs and a precisely controlled propulsion system will also be developed. A rover is being designed to be able to travel over a wide area and observe featured terrain using scientific instruments. Since some of the instruments require long-term observation on the lunar surface, technology for night survival over more than 2 weeks needs to be considered. The SELENE-2 technologies are expected to be one of the stepping stones towards future Japanese human activities on the moon and to expand the possibilities for deep space science. 相似文献
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月球表面热环境测量技术调研分析 总被引:1,自引:1,他引:0
月面热环境探测是我国探月工程中的一项必要工作,具有重要的工程和科学意义。文章从工程角度确定了月面热环境测量的主要物理参数,分析了现阶段我国探月工程中实现月面热环境测量的技术条件和要求;对国内外有关材料热物性测量技术进行了综合调研,了解了国内外关于开展行星表面热环境探测的技术及应用现状;在结合我国航天测量技术的基础上对月面热环境测量所涉及的关键技术进行了分析,并初步勾勒出我国探月工程中月面热环境测量装置的指标、任务和实现方案。 相似文献
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月球坑内空间环境热流的分布研究 总被引:1,自引:1,他引:0
文章推导获得了月面阳光矢量和月球坑内探测器表面关系的表达式,采用蒙特卡罗法数值计算探测器各表面的辐射热流,分析了月球坑内环境辐射热流的分布特征。讨论了月面纬度、月球坑尺寸、月面发射率等参数对探测器表面热流的影响。计算表明:月面纬度增加及月球坑坑口半径的减小均会导致某些时刻阳光无法照射到坑底,从而与其他工况有较大的计算差别,两参数对探测器各面热流的影响规律不同;月面发射率对探测器表面热流的影响作用较大,增加月面发射率能明显降低探测器某些表面的辐射热流。 相似文献
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随着中国深空探测的发展,在月球表面进行着陆探测成为新的关注热点,因此月球着陆器的着陆稳定性研究成为一项重要课题。文章利用ADAMS软件及其用户子程序,对一种可展开四腿式月球着陆器的着陆稳定性进行了研究,研究结论为着陆器的着陆缓冲机构及总体设计提供参考。 相似文献
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