|Table of Contents|

Simulation analysis on operating characteristics of gas-filled accumulator system(PDF)

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

Issue:
2018年03期
Page:
37-42
Research Field:
研究与设计
Publishing date:

Info

Title:
Simulation analysis on operating characteristics of gas-filled accumulator system
Author(s):
WAN Yilun1;  FU Xinyu2; ZHANG Lihui1;  HU Jiuhui3
1. School of Astronautics, Beihang University, Beijing 100191, China; 2. Xi'an Chaoyue Electromechanical Technology Co. LTD., Xi'an 710077; 3. Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China
Keywords:
gas-filled accumulator;  propulsion system;  natural frequency;  POGO vibration
PACS:
V434-34
DOI:
-
Abstract:
With the POGO stability of a large launch vehicle as research background, the simulation analysis of a gas-filled accumulator was carried out without any application in China. On the basis of building the dynamic model of a gas-filled accumulator, the accuracy of simulation was validated by using the relevant parameters of the space shuttle main engine. The influences of the accumulator on the natural frequency of a propulsion system and the frequency characteristics of propulsion systems of four different pressure accumulators were calculated. The effects of injection flow rate, injection temperature, venting flow rate and venting time on the dynamic characteristics of accumulator were investigated. The simulation results indicate that the compression capacity of the accumulator's pneumatic die cushion at the bottom of overflow holes decreases with the increase of the inlet pressure. Besides, the gas-filled accumulator can more effectively avoid the intersection of propulsion system frequency and vehicle structural frequency in comparison with traditional accumulator. The research results have a certain reference significance for the development of gas-filled accumulator.

References:

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Memo

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Last Update: 2018-06-30