Dynamic modeling and simulation analysis of LOX/RP1 variable thrust engines using motor pump: Part I-single condition analysis

CUI Peng; SONG Jie; LI Qinglian; CHEN Lanwei; LIANG Tao; SUN Jun

doi:10.7527/S1000-6893.2021.24884

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2022 , Vol. 43 >Issue 1: 124884 - 124884

DOI: https://doi.org/10.7527/S1000-6893.2021.24884

Fluid Mechanics and Flight Mechanics

Dynamic modeling and simulation analysis of LOX/RP1 variable thrust engines using motor pump: Part I-single condition analysis

CUI Peng ,
SONG Jie ,
LI Qinglian ,
CHEN Lanwei ,
LIANG Tao ,
SUN Jun

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Science and Technology on Scramjet Laboratory, College of Aerospace Science and Technology, National University of Defense Technology, Changsha 410073, China

Received date: 2020-10-16

Revised date: 2021-01-21

Online published: 2021-01-21

Supported by

Pre-research Project in Manned Space (050302)

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Abstract

LOX/RP1 variable thrust liquid rocket engines using a motor pump have been widely studied in recent years because of their environmentally friendly performance, adjustable throttling depth and convenient adjustment. As a kind of variable thrust rocket engine, its system response characteristics are critical in directly determining the spacecraft maneuverability. However, previous research on the LOX/RP1 variable thrust engine using a motor pump mainly focuses on the system scheme design, and the dynamic analysis is relatively preliminary. In this paper, the response characteristics of the throttling system under different conditions and the variation of system performance parameters with the thrust level are studied by establishing a simulation platform of the LOX/RP1 variable thrust engine using a motor pump in consideration of the influence of the battery, motor and cooling channel. The results show that, although the response speed of the motor pump is fast, that of the cooling channel parameters is slow, leading to a short board effect. That is, the response time of the system performance parameters is ten times more than that of the motor pump speed. Contrarily, under low operating conditions, reducing the mixing ratio can ensure the smooth regulation of the thrust when the cooling channel outlet is in subcritical condition. Therefore, to improve the response characteristics of the system, the flow velocity in the cooling channel should be increased as much as possible when the pressure drop requirements are met.

Key words： LOX/RP1; motor pumps; variable thrust; liquid rocket engines; system dynamics; modeling and simulation; cooling channels

Cite this article

CUI Peng , SONG Jie , LI Qinglian , CHEN Lanwei , LIANG Tao , SUN Jun . Dynamic modeling and simulation analysis of LOX/RP1 variable thrust engines using motor pump: Part I-single condition analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(1) : 124884 -124884 . DOI: 10.7527/S1000-6893.2021.24884

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