|Table of Contents|

Effects of momentum ratio on atomization characteristics of internal mixing gas-liquid injector(PDF)

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

Issue:
2019年05期
Page:
66-73
Research Field:
研究与设计
Publishing date:

Info

Title:
Effects of momentum ratio on atomization characteristics of internal mixing gas-liquid injector
Author(s):
YANG Guohua1; 2;  ZHANG Botao2;  ZHOU Lixin2;  WANG Kai2
(1.Science Technology on Combustion, Internal Flow and Thermal-structure Laboratory,Northwestern Polytechnical University,Xi’an 710072, China; 2.Science and Technology on Liquid Rocket Engines Laboratory,Xi’an Aerospace Propulsion Institute, Xi’an 710100,
Keywords:
internal mixing gas-liquid injector;  atomization;  adaptive mesh refinement;  Gerris
PACS:
V430.34
DOI:
-
Abstract:
In order to research the effects of liquid-gas momentum ratio on atomization characteristics of internal mixing gas-liquid injector, the internal mixing gas liquid injector with two jet holes was numerically computed under various liquid-gas momentum ratio by the VOF method and adaptive mesh refinement algorithm based on Gerris.The results show that the characteristics of the whole spray process are captured accurately in Gerris, which consists of column distortion,bending and disintegrating into droplets.The computational results are basically in good agreement with the breakup process images in experiment.The spatial distributions of droplets were obtained and the droplets SMD of full flow field is 50～60 μm.When liquid-gas momentum ratio is small, the liquid jets of internal mixing gas liquid injector do not collide with each other, and the atomization mechanism is pneumatic atomization.With the increase of the liquid-gas momentum ratio, two liquid jets’ breakup length and penetration depth are increased, and liquid jets collide, at that time atomization mechanism is pneumatic atomization and impact atomization.

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Last Update: 2019-10-25