天宫一号工程：长征二号运载火箭的发射
"Heavenly Palace" No.1 project: Launching of "Long March" series II carrier rocket.
在中国的空间站工程施用的运载火箭
Carrier Rockets Used for China's Space Station Project
现有长征运载火箭系列全家福
Actually available series of carrier rockets - picture of the whole family.
长征三号系列各级箭体分离示意图，长征二号的1、2级的分离方式与此相同
Schematic diagram of stage separation for "Long March" series III, identical procedure to the separation of stage 1 and 2 for "Long March" series II.
长征三号系列的第三级发动机原理图
Schematic diagram of stage-3 propulsion engine for "Long March" series III.
The propulsion system uses liquid hydrogen (LH) as a fuel which is being mixed with liquid oxygen (LOX) in the upper part of the thrust chamber where ignition of the explosive mixture takes place. In a subsystem, small portions of hydrogen and oxygen are being mixed in a gas generator. After preheating, the now gaseous mixture has a remarkable pressure and can therefore drive the LH and LOX pumps. The escaping gas composition of the subsystem can then be released (or even burnt) in a side chamber and thus add to the thrust of the main chamber.
As to the "solid propellant starters" (items 17a,b) in the above drawing, I could imagine that these are solid state fuel cells for the "cold burning" of explosive gaseous mixture in the subsystem, thus generating a certain amount of electricity for initial operation of the pumps and ignition in the thrust chamber. Yet, this cannot be verified by additional information.
长征三号系列的2级箭体，长征二号丙的2级箭体设计与此相同
Propulsion device, identical for the second stage of carrier rocket "Long March" series III and II-3.
长征二号F的1级、2级等箭体
First and second stage of "Long March" series II-F.
发射场与晨光
Launching site at sunrise.
Advertisement for China's Aviation EXPO 2011 last September.
No comments:
Post a Comment