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介绍了药浆燃速,药条燃速(也称静态燃速)发动机燃速及它们之间的关系,药浆燃速的测试方法及试样制作。药浆燃速的测试是在推进剂装药之前,若能应用于预示,它将防止装入不符合设计指标要求的推进剂,从而保证装药质量,根据实验结果发现,目前的药浆燃速测试结果能反映因配方改变而导致的燃速差别,药浆燃速与药条燃速,实验发动机燃速有较好的定量关系。 相似文献
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介绍了Φ118mm标准发动机装药在不同自然存放天数下,其燃速随着自然存放天数增加呈现出上升的规律性。通过数理统计分析确定了存放天数指标,并在批量生产中有效地控制了全尺寸固体发动机燃速性能。 相似文献
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固体发动机推进剂燃速预估研究 总被引:3,自引:1,他引:3
介绍了用随机小尺寸试验发动机平均燃速预估全尺寸发动机燃速的方法,讨论了全尺寸发动机燃速预估精度及其影响因素,并通过实例指出提高全尺寸发动机燃速预估精度的主要途径。 相似文献
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翼槽内的火焰传播过程对翼柱型固体发动机的点火升压过程有很大的影响。通过模拟试验发动机点火试验获得的翼槽内火焰传播数据,结合翼柱型装药点火升压计算模型,分析了推进剂燃速、点火能量、喷管堵盖打开压强、翼槽部位的初始燃面等设计参数在点火升压过程中的匹配关系。分析方法对不同结构翼柱型装药发动机设计是有用的。 相似文献
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本文通过实验,用方坯烧注模拟单室双推力发动机的装药方式,研究了两种不同燃速推进剂在不同的本体强度和采用不同的浇注-固化装药方式对单室双推力发动机内两种推进剂药面结合部位粘接性能的影响。 相似文献
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本文系统地总结了我们在旋转固体火箭发动机内弹道理论与实验研究方面的某些成果,其中包括含铝丁羟推进剂的试片实验和装药发动机实验以及燃速敏感性预示和内弹道预示,得出了一些有益的结论,可供发动机设计及推进剂配方设计参考。 相似文献
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针对Si_3N_4/TC4复合结构钎焊连接问题,研究了钎料和母材中活性元素Ti对Si_3N_4/TC4接头润湿性、界面结合机制和力学性能的影响。进行了润湿、接头显微组织分析和剪切强度试验,结果表明:活性元素Ti对于钎料在陶瓷表面的润湿起主要作用,Ag-Cu钎料通过TC4母材中Ti元素的长程扩散进入Si_3N_4界面虽然实现润湿,但形成的反应产物并不明显,陶瓷/钎料界面成为断裂薄弱区域。Ag-Cu-Ti钎料中Ti元素在Si_3N_4一侧界面富集形成TiN+Ti_5Si_3反应层,对钎料在陶瓷界面润湿性和接头断裂脆性都具有改善作用,接头剪切强度达到267.3 MPa。 相似文献
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GF-4 Undergoes Test GF-4 is the first geosynchronous orbit Earth observation satellite with high resolution.The Beijing Institute of Control Engineering,CAST conducted a verification test for the complete satellite fuelling procedure,simulated the whole cycle of parallel propellant tanks filling of the propulsion subsystem. 相似文献
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YANG Cheng 《中国航天(英文版)》2018,(2)
正At 12:25 Beijing time on April 10,a LM-4C carrier rocket lifted off from the Jiuquan Satellite Launch Center,launching 3 remote sensing satellites and a micro/nano technology testing satellite into their preset orbits.It was the 271st flight of the LM series launch vehicle. 相似文献
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正China launched a relay satellite named Queqiao on a LM-4C launch vehicle from the Xichang Satellite Launch Center at 05:28 Beijing time on May 21,2018.It is the world’s first communications satellite that operates in the orbit around the second Lagrangian(L2)point of the Earth-moon system, 相似文献
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《中国航天(英文版)》2017,(2)
<正>China announced at GLEX 2017that the Chang’e 4 probe will carry four scientific payloads from international cooperation programs,including a lowfrequency radio spectrometer of the Netherlands,a small analyzer for neutral atoms from Sweden,a neutron dosim- 相似文献
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《中国航天(英文版)》2003,(2)
Center for Space Science and Applied Research, Chinese Academy of Sciences announced recently that the development and production of Shenzhou 5 is being accelerated. Everything is going on well with the astronauts' training and Shenzhou 5 will be launched as scheduled. It is also reported that all the science experiments conducted on orbit by Shenzhou 4, which was launched successfully last year, have been completed. It was the first time for our country to survey the overall space environment in large scale for Shenzhou spaceship's operating on orbit, making "a sketch map of road condition". 相似文献
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《中国航天(英文版)》2017,(2)
FY-4 is the second generation of Chinese geostationary satellite for quantitative remote sensing meteorological application. The detection efficiency, spectral bands, spatial and time resolution have been greatly improved with respect to those of first generation, as well as the radiometric calibration and sensitivity. The combination of multichannel detection and vertical sounding was first realized on FY-4, because both the Advanced Geostationary Radiation Imager(AGRI) and Geostationary Interferometric Infrared Sounder(GIIRS) are on the same spacecraft. The main performance of the payloads including AGRI, GIIRS and Lightning Mapping Imager, and the spacecraft bus are presented, the performance being equivalent to the level of the third generation meteorological satellites in Europe and USA. The acquiring methods of remote sensing data including multichannel and high precision quantitative observing, imaging collection of the ground and cloud, vertical observation of atmospheric temperature and moisture, lightning imaging observation and space environment detection are shown. Several innovative technologies including high accuracy rotation angle detection and scanning control, high precision calibration, micro vibration suppression, unified reference of platform and payload and on-orbit measurement, real-time image navigation and registration on-orbit were applied in FY-4. 相似文献