|Table of Contents|

Frequency response characteristics of variable thrust engine with gas generator cycle(PDF)

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

Issue:
2020年02期
Page:
29-35
Research Field:
研究与设计
Publishing date:

Info

Title:
Frequency response characteristics of variable thrust engine with gas generator cycle
Author(s):
HUANG Xixuan;  HUANG Minchao;  Hu Xiaoping
(Aerospace Science College, National University of Defense Technology, Changsha 421000, China)
Keywords:
liquid rocket engine;  gas generator cycle;  simulation model;  frequency response;  variable thrust
PACS:
V434.3
DOI:
-
Abstract:
A gas generatorcycle liquid rocket engine simulation model was established based on module built on the finite element method of the segmentation concentration parameter.The system characteristics and frequency response of variable thrust engine under variable working conditions were studied.The results indicater:the engine system has different system characteristic frequencies with their corresponding damping coefficient under different operating conditions.By extracting main frequencies during the variable operating conditions, the frequency corresponding to peak energy was found to be 5.34 Hz.During the transition from high operating condition to low operating condition, the inlet disturbing pressure signal with frequency mentioned above was input,the simulation results show that this low frequency disturbance reduces the stability margin of the system and the occurrence of disturbance signals at this frequency should be avoided.

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Last Update: 2020-04-25