A LM-4C launch vehicle lifted off from the Taiyuan Satellite Launch Center at 02：28 Beijing time on May 9,launching GF-5 satellite into space.The launch mission was successfully completed with the satellite entering ...A LM-4C launch vehicle lifted off from the Taiyuan Satellite Launch Center at 02：28 Beijing time on May 9,launching GF-5 satellite into space.The launch mission was successfully completed with the satellite entering its preset sun-synchronous orbit.展开更多
A LM-4 B launch vehicle was launched from the Taiyuan Satellite Launch Center at 13:57 Beijing time on September 7, transferring the Gaofen 11-02 satellite into its preset orbit successfully.Gaofen 11-02 is an optical...A LM-4 B launch vehicle was launched from the Taiyuan Satellite Launch Center at 13:57 Beijing time on September 7, transferring the Gaofen 11-02 satellite into its preset orbit successfully.Gaofen 11-02 is an optical remote sensing satellite developed by CAST, which will be mainly used for land surveys, city planning, land-right confirmation, road network design, crop yield estimation and disaster prevention and mitigation。展开更多
A LM-3B carrier rocket lifted off from the Xichang Satellite Launch Center at 2:09 Beijing time on June 25,successfully putting the BeiDou 3 IGSO-2 satellite into orbit. IGSO-2 satellite,the 21st BeiDou 3 satellite as...A LM-3B carrier rocket lifted off from the Xichang Satellite Launch Center at 2:09 Beijing time on June 25,successfully putting the BeiDou 3 IGSO-2 satellite into orbit. IGSO-2 satellite,the 21st BeiDou 3 satellite as well as the 46th BeiDou Navigation Satellite System (BDS) satellite,was developed by the China Academy of Space Technology (CAST).At present,there are 18 MEO,I GEO and IGSO satellites among all the BeiDou 3 satellites.展开更多
LM-2D carrier rockets placed two land survey satellites into their preset orbits from the Jiuquan Satellite Launch Center at 15:10 Beijing time on January13 and 15:10 Beijing time on March 17respectively.The satellite...LM-2D carrier rockets placed two land survey satellites into their preset orbits from the Jiuquan Satellite Launch Center at 15:10 Beijing time on January13 and 15:10 Beijing time on March 17respectively.The satellites were developed by DFH Satellite Co.,Ltd.under the展开更多
In terms of developing supercritical CO_(2)(sCO_(2))coal-fired power plants,enhancing cooling wall performance is one of significant factors to improve system performance.In this paper,a new cooling wall tube structur...In terms of developing supercritical CO_(2)(sCO_(2))coal-fired power plants,enhancing cooling wall performance is one of significant factors to improve system performance.In this paper,a new cooling wall tube structure is proposed to match the non-uniform heat flux(NUH)with the thermal resistance by changing the cooling wall tube eccentricity.A three-dimensional multi-physical coupling model of cooling wall is constructed to compare the novel structure to the conventional structures.The properties of fluid dynamics,thermal stress,coupled heat transfer and cooling wall deformation are analyzed.In contrast to the traditional structure,the maximum temperature and circumferential temperature difference(CTD)of the proposed structure can be reduced by 2%and 27.4%,respectively.The essential working parameters related to the performances of the cooling wall tube are discussed.The maximum temperature of the new structure is reduced by 8-13 K and the maximum thermal stress is reduced by about 10%-15%under all the simulated working conditions when the eccentricity changes from 0 to 0.2.The proposed structure can effectively reduce the maximum temperature and circumferential temperature gradient under NUH.Consequently,a novel insight is put out for the design and optimization of the cooling wall tube in coal-fired power plants.展开更多
文摘A LM-4C launch vehicle lifted off from the Taiyuan Satellite Launch Center at 02：28 Beijing time on May 9,launching GF-5 satellite into space.The launch mission was successfully completed with the satellite entering its preset sun-synchronous orbit.
文摘A LM-4 B launch vehicle was launched from the Taiyuan Satellite Launch Center at 13:57 Beijing time on September 7, transferring the Gaofen 11-02 satellite into its preset orbit successfully.Gaofen 11-02 is an optical remote sensing satellite developed by CAST, which will be mainly used for land surveys, city planning, land-right confirmation, road network design, crop yield estimation and disaster prevention and mitigation。
文摘A LM-3B carrier rocket lifted off from the Xichang Satellite Launch Center at 2:09 Beijing time on June 25,successfully putting the BeiDou 3 IGSO-2 satellite into orbit. IGSO-2 satellite,the 21st BeiDou 3 satellite as well as the 46th BeiDou Navigation Satellite System (BDS) satellite,was developed by the China Academy of Space Technology (CAST).At present,there are 18 MEO,I GEO and IGSO satellites among all the BeiDou 3 satellites.
文摘LM-2D carrier rockets placed two land survey satellites into their preset orbits from the Jiuquan Satellite Launch Center at 15:10 Beijing time on January13 and 15:10 Beijing time on March 17respectively.The satellites were developed by DFH Satellite Co.,Ltd.under the
基金financial support provided by the National Natural Science Foundation of China(No.52076075 and No.52130608)。
文摘In terms of developing supercritical CO_(2)(sCO_(2))coal-fired power plants,enhancing cooling wall performance is one of significant factors to improve system performance.In this paper,a new cooling wall tube structure is proposed to match the non-uniform heat flux(NUH)with the thermal resistance by changing the cooling wall tube eccentricity.A three-dimensional multi-physical coupling model of cooling wall is constructed to compare the novel structure to the conventional structures.The properties of fluid dynamics,thermal stress,coupled heat transfer and cooling wall deformation are analyzed.In contrast to the traditional structure,the maximum temperature and circumferential temperature difference(CTD)of the proposed structure can be reduced by 2%and 27.4%,respectively.The essential working parameters related to the performances of the cooling wall tube are discussed.The maximum temperature of the new structure is reduced by 8-13 K and the maximum thermal stress is reduced by about 10%-15%under all the simulated working conditions when the eccentricity changes from 0 to 0.2.The proposed structure can effectively reduce the maximum temperature and circumferential temperature gradient under NUH.Consequently,a novel insight is put out for the design and optimization of the cooling wall tube in coal-fired power plants.
