|Table of Contents|

Numerical simulation of flow process in screw centrifugal nozzle(PDF)

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

Issue:
2015年04期
Page:
13-18
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical simulation of flow process in screw centrifugal nozzle
Author(s):
WU Gaoyang;  ZHENG Gang;  NIE Wansheng;  QIAO ye
Equipment Academy, Beijing 101416, China
Keywords:
VOF modelscrew centrifugal nozzlegas coreliquid filmtotal pressure loss
PACS:
V434-34
DOI:
-
Abstract:
The volume of fluid (VOF) model was used to carry out the 3D numerical simulation of the flow process inside the screw centrifugal nozzle. The flow process of liquid phase in the nozzle and the distribution of velocity and pressure in each area inside the nozzle were analyzed emphatically. The results show a cavitation is formed in the joint of spiral groove and entrance when the liquid phase enters into spiral groove, and the size of cavitation decreases as the liquid phase flows into the nozzle; A stable gas core is formed in the center of spiral flow, and the liquid film thickness at the nozzle exit reduce gradually along the axial direction when flow field in the nozzle is stable; The maximum tangential velocity of liquid phase in the liquid flow region is near the gas-liquid interface and reduce along the axial direction; The impact of each part in the nozzle on total pressure loss (from large

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Last Update: 1900-01-01