|Table of Contents|

Numerical simulation of kerosene/oxygen coaxial centrifugalinjector combustion(PDF)

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

Issue:
2021年02期
Page:
32-39
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical simulation of kerosene/oxygen coaxial centrifugalinjector combustion
Author(s):
WU Di; JIN Feng; LIU Yong
School of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Keywords:
double-shear coaxial centrifugal injector;  gas/gas combustion;  oil-gas ratio;  numerical simulation;  flow and combustion characteristics
PACS:
V434
DOI:
-
Abstract:
In order to better understand the working characteristics of coaxial centrifugal nozzles, the hydrodynamic characteristics and non-premixed combustion characteristics of nozzles with kerosene/oxygen as propellant based on the DDES(第一次出现,应有说明)model with oil-gas ratios of 0.5, 1, and 1.5 were studied. The research results show that due to the swirling centrifugal effect, there are a stationary vortex and an angular vortex at the nozzle outlet axis and the top of the combustion chamber, respectively. The stationary vortices are distributed in the radial direction from 0.9 R to 1.4 R and the axial dimension is -1 R.～14 R, as the fuel flow increases, the stationary vortex will advance toward the inside of the nozzle, and the radial size will also expand. The combustion calculation results show that as the fuel flow increases, the propellant blending drag zone becomes longer and the blending effect is increased. However, due to the increase of the oil-gasmixing ratio, the combustion temperature decreases, and the flame front moves inward to the nozzle.

References:

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