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Numerical simulation of primary breakup and secondary atomization for centrifugal nozzle(PDF)

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

Issue:
2022年04期
Page:
13-20
Research Field:
目次
Publishing date:

Info

Title:
Numerical simulation of primary breakup and secondary atomization for centrifugal nozzle
Author(s):
XU Wen1;  GAO Xinni2;  HU Baolin2;  YANG Jianwen2;  YANG Bin1;  WANG Ying1
(1.School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 2.Xian Aerospace Propulsion Institute, Xian 710100, China)
Keywords:
centrifugal nozzle numerical simulation VOF-to-DPM hollow conical liquid film primary breakup secondary atomization
PACS:
V19
DOI:
-
Abstract:
The centrifugal nozzle has a large axial rotation velocity component, which induces an air core to produce a hollow conical liquid film at the nozzle outlet.The hollow conical liquid film will undergo the primary breakup and secondary atomization, and the flow behavior is complex.In this paper,a multiphase flow model named Volume of Fluid-to-Discrete Phase Model(VOF-to-DPM)is adopted and it combines the Volume of Fluid method and the Euler-Lagrange method.Combined with the adaptive mesh refinement method,the characteristics of atomization flow field of the centrifugal nozzle with double tangential holes are studied.The whole process from the generation, development to the primary breakup and secondary atomization of the hollow conical liquid film is analyzed.The results show that the atomization angle of the nozzle simulated based on the VOF-to-DPM multiphase flow model is basically consistent with the atomization angle measured by the experiment, which verifies the reliability of the numerical model in this paper.The existence of adaptive grid in the calculation process can simulate the formation of the liquid filmmore accurately.The hollow conical liquid film is more stable with the increase of mass flow during the process from development to primary breakup.The total number of liquid particles produced by the liquid film secondary atomization decreases with the increase of mass flow rate, and the particle size distribution is more uniform.

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