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Numerical study on effect of arc leading edge and trailing edge of cavity on flow field(PDF)

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

Issue:
2013年01期
Page:
24-28
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical study on effect of arc leading edge and trailing edge of cavity on flow field
Author(s):
ZHOU Si-yin;  NIE Wan-sheng;  CHE Xue-ke
The Academy of Equipments, Beijing 101416, China
Keywords:
numerical simulation;  leading edge and trailing edge;  arc;  flow field
PACS:
V439-34
DOI:
-
Abstract:
The two-dimensional simulation for the supersonic flow field of concave-cavity architectures with different radius arc leading and trailing edges was carried out based on k-ω SST model. The corresponding flow field feature parameters were obtained. The simulation results show that, compared with the right angle leading and trailing edges, the shock wave was strengthened near the trailing edges when using the arc edges. By contrast, cavities with different arc radius were considered when the velocity, temperature and vorticity were calculated. It demonstrates that, with the increase of arc radius, the velocity inside the cavity increases, and temperature and vorticity magnitudes appears a decline trend. As viewed from flame stabilization and combustion-supporting, the pressure increase at the upper end of back wall can promote the mass exchange and at the same time, can lower the temperature in recirculation zone. A proper limit of the arc radius is proposed in overall consideration of flame stabilization and combustion-supporting effect of concave-cavity.

References:

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