The lunar-landing is the continuity of manned spaceflight engineering. Comparing with the manned spacecraft engineering, it requires more reliability , larger scale, and more funds. On the basis of China’s achievemen...The lunar-landing is the continuity of manned spaceflight engineering. Comparing with the manned spacecraft engineering, it requires more reliability , larger scale, and more funds. On the basis of China’s achievements and the experiences of foreign countries, the paper brings forward the idea that using the existing transportation technology to send the launch vehicles and cosmonauts to the near-earth orbit in batches, assembling the components together on the space-launch platform, and then launching them to the moon to fulfill our dream of manned landing on the moon. The paper also discusses the space launch platform and the launching ways.展开更多
On April 24, 1970, the LM-1 launch vehicle made its debut flight, successfully sending China's first man-made satellite DFH-1 to the Earth orbit. After more than 40 years' development, China's space launch...On April 24, 1970, the LM-1 launch vehicle made its debut flight, successfully sending China's first man-made satellite DFH-1 to the Earth orbit. After more than 40 years' development, China's space launch technology has made great progress. So far, China has independently developed 12 versions of Long March (LM) series launch vehicles for high, intermediate展开更多
RP-3 jet fuel could be an alternative fuel for diesel engines.In this study,the injection characteristics of RP-3jet fuel under single and split injection strategies were investigated and compared with diesel fuel.The...RP-3 jet fuel could be an alternative fuel for diesel engines.In this study,the injection characteristics of RP-3jet fuel under single and split injection strategies were investigated and compared with diesel fuel.The experimental results indicate that RP-3 jet fuel has slightly shorter injection delay time than diesel fuel,but this difference is negligible in actual engine operations.Further,although the lower density and viscosity of RP-3 jet fuel lead to higher volumetric injection rates and cycle-based injection quantities,the cycle-based injection mass and the mass injection rates at the stable injection stage of RP-3 jet fuel are close to or slightly lower than those of diesel fuel.Based on these experimental observations,it could be concluded that fuel physical properties are the secondary factor influencing the injection characteristics in both single and split injection strategies,as RP-3 jet fuel and diesel fuel are taken for comparison.展开更多
Since the successful launch on September 15,the Tiangong2 space laboratory mission commenced,5 years after the successful operation of the Tiangong 1 target spacecraft.Tiangong2 is the first spacecraft that was launch...Since the successful launch on September 15,the Tiangong2 space laboratory mission commenced,5 years after the successful operation of the Tiangong 1 target spacecraft.Tiangong2 is the first spacecraft that was launched into space as part of phase two of the second step of China’s manned space program.It is the first real space laboratory for the country.Compared with Tiangong 1,展开更多
China launched Algeria’s communications satellite,Alcomsat-1,on a LM-3B carrier rocket into its preset orbit from the Xichang Satellite Launch Center at 00：40 Beijing time on December 11 successfully.Alcomsat-1 is A...China launched Algeria’s communications satellite,Alcomsat-1,on a LM-3B carrier rocket into its preset orbit from the Xichang Satellite Launch Center at 00：40 Beijing time on December 11 successfully.Alcomsat-1 is Algeria’s first communications satellite as well as the first cooperative project in the aerospace industry between China and Algeria.展开更多
文摘The lunar-landing is the continuity of manned spaceflight engineering. Comparing with the manned spacecraft engineering, it requires more reliability , larger scale, and more funds. On the basis of China’s achievements and the experiences of foreign countries, the paper brings forward the idea that using the existing transportation technology to send the launch vehicles and cosmonauts to the near-earth orbit in batches, assembling the components together on the space-launch platform, and then launching them to the moon to fulfill our dream of manned landing on the moon. The paper also discusses the space launch platform and the launching ways.
文摘On April 24, 1970, the LM-1 launch vehicle made its debut flight, successfully sending China's first man-made satellite DFH-1 to the Earth orbit. After more than 40 years' development, China's space launch technology has made great progress. So far, China has independently developed 12 versions of Long March (LM) series launch vehicles for high, intermediate
基金Project(52022058)supported by the National Natural Science Foundation of ChinaProject(19160745400)supported by the Shanghai Science and Technology Committee,China。
文摘RP-3 jet fuel could be an alternative fuel for diesel engines.In this study,the injection characteristics of RP-3jet fuel under single and split injection strategies were investigated and compared with diesel fuel.The experimental results indicate that RP-3 jet fuel has slightly shorter injection delay time than diesel fuel,but this difference is negligible in actual engine operations.Further,although the lower density and viscosity of RP-3 jet fuel lead to higher volumetric injection rates and cycle-based injection quantities,the cycle-based injection mass and the mass injection rates at the stable injection stage of RP-3 jet fuel are close to or slightly lower than those of diesel fuel.Based on these experimental observations,it could be concluded that fuel physical properties are the secondary factor influencing the injection characteristics in both single and split injection strategies,as RP-3 jet fuel and diesel fuel are taken for comparison.
文摘Since the successful launch on September 15,the Tiangong2 space laboratory mission commenced,5 years after the successful operation of the Tiangong 1 target spacecraft.Tiangong2 is the first spacecraft that was launched into space as part of phase two of the second step of China’s manned space program.It is the first real space laboratory for the country.Compared with Tiangong 1,
文摘China launched Algeria’s communications satellite,Alcomsat-1,on a LM-3B carrier rocket into its preset orbit from the Xichang Satellite Launch Center at 00：40 Beijing time on December 11 successfully.Alcomsat-1 is Algeria’s first communications satellite as well as the first cooperative project in the aerospace industry between China and Algeria.
