|Table of Contents|

Analysis and design of system cycle for nuclear thermal rocket engine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2022年01期
Page:
14-21
Research Field:
研究与设计
Publishing date:

Info

Title:
Analysis and design of system cycle for nuclear thermal rocket engine
Author(s):
JI Yu; MAO Chenrui; SUN Jun; LANG Minggang; SHI Lei
(Key Laboratory of Advanced Reactor Engineering and Safety Ministry of Education,Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)
Keywords:
nuclear thermal rocket engine;  hydrogen;  ammonia;  system cycle;  manned Mars exploration
PACS:
V439.5
DOI:
-
Abstract:
Nuclear Thermal Propulsion(NTP)is a leading candidate for manned Mars exploration,which offers the advantages of high specific impulse,high thrust and long sustained lifetime for propulsion technology. Due to the limited research in China,it is desiderated to promote the related studies on the theory and methods about NTP. System cycle analysis is one of the major problems,which significantly benefits the overall design of the propulsion system. In this work,the principles,pros and cons of three main cycles for NTP engine were analyzed. Based on the closed expansion cycle,a hydrogen NTP system with Isp being 910 s and another ammonia NTP system with Isp being 390 s were designed. Further,the merits and faults of these two systems were also analyzed,which indicated that the H2 NTP system is more suitable for manned deep space exploration. For the NH3 NTP systems,it has advantageous in long-term in-orbit storage of propellant,design difficulty of turbo-pump and nuclear reactor. And it could serve as the substitution of liquid methane oxide engine,being qualified for the long-term and multiple exploration missions with relatively small orbit altitude change. In addition,combining the design procedure and the difference between the cycles of NTP engine and that of chemical engine,several key fundamental issues related to cycle design were proposed,which could provide references for the R&D of NTP engine in our country.

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