|Table of Contents|

Simulation analysis of adjustment and control process for core machine in closed Brayton cycle(PDF)

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

Issue:
2021年05期
Page:
49-55
Research Field:
研究与设计
Publishing date:

Info

Title:
Simulation analysis of adjustment and control process for core machine in closed Brayton cycle
Author(s):
XUE Xiang; DU Lei; WANG Haoming; ZHANG Yinyong; LIN Qingguo
(Shanghai Engineering Research Center of Space Engine,Shanghai Institute of Space Propulsion, Shanghai 201112,China)
Keywords:
closed Brayton cycle space nuclear electric propulsion core machine control strategy system simulation
PACS:
V476.2
DOI:
-
Abstract:
To ensure that the core machine in the closed Brayton cycle can operate stably in the space nuclear power propulsion system,it is necessary to control multiple system variables at the same time during its regulation process,and set appropriate initial states and control strategies. Through the system simulation of the entire closed Brayton cycle,the system parameter changes of the core machine during the speed-up loading process are simulated under different initial pressures. Under the control strategy of the core engine rotational speed cooperated with the reactor heating,the compressor can always be in a stable operation range during the entire speed-up loading process. The initial pressure of the circulation system will affect various parameters during the loading process of the core engine,especially the turbine inlet temperature. In the case of a relatively low system initial pressure,a higher turbine inlet temperature is required to achieve the same full-state electrical power output as that under a high initial pressure condition. The simulation results verify the feasibility of the core machine adjustment strategy with precise speed control as the operating standard. Meanwhile,these can provide guidance and suggestions for the hot commissioning test of the circulatory system at different stages.

References:

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