|Table of Contents|

Numerical simulation of the influence of single jet obliquely impinging against wall(PDF)

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

Issue:
2023年06期
Page:
46-54
Research Field:
目次
Publishing date:

Info

Title:
Numerical simulation of the influence of single jet obliquely impinging against wall
Author(s):
DAI Qingwen1;  YANG Jianwen2;  YANG Bin1;  WANG Ying1
1.Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2.Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
liquid rocket engine;  oblique jet impinging;  liquid film;  numerical simulation;  gas-liquid flow
PACS:
V434+.14
DOI:
-
Abstract:
In order to investigate the morphological variation rule of liquid film after oblique cylindrical jet impinging on solid surface, a multiphase flow model named Volume of Fluid Phase Model(VOF)was adopted and combined with the polyhedral hybrid grid.The geometric characteristic parameters variations of the liquid film after the jet impacting on the wall obliquely under different working conditions were analyzed, and the key characteristics of the liquid film spreading under different working conditions were obtained.The results show that after the jet dashing against the solid surface obliquely, the wall pressure gradually decreases from the edge of the liquid film to the central axis.As the jet velocity increases, the pressure on the wall near the impinging point increases, while the pressure on the liquid film collection area decreases.At the same time, the liquid film has the maximum velocity, which occurs near the impact point, and the minimum velocity appears near the confluence point of the hydraulic jump zone.As the jet aperture increases, the area of the maximum velocity and minimum velocity region of the spreading liquid film scales up obviously.

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