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Atomization and Sprays
Fator do impacto: 1.737 FI de cinco anos: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 2.2

ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2020034004
pages 301-317

INSTABILITY OF A VISCOUS SHEAR LAYER UNDER SUPERCRITICAL CONDITIONS

Run-ze Duan
School of Energy and Environment Engineering, Hebei University of Technology, Tianjin, 300401, China
Huan-ran Wang
Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Heng Zhang
School of Energy and Environment Engineering, Hebei University of Technology, Tianjin, 300401, China
Hongbin Duan
Shanxi Jinnan iron and Steel Group Co., Ltd, Shanxi, 043400, China
Lian-sheng Liu
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China; Hebei Key Laboratory of Thermal Science and Energy Clean Utilization, Hebei University of Technology, Tianjin, 300401, China
Fei Zhao
Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing, 100094, China

RESUMO

The temporal instability analysis on the shear layer formed by injecting nitrogen jet into the supercritical nitrogen environment was carried out. The instability solution of the supercritical shear layer was obtained by using a spectral high precision, numerical method. The real gas effect of the base flow was calculated by using the Soave-Redlich-Kwong equation of state. The dependence of the viscosity with the pressure and temperature was fitted from the NIST REFPROP physical properties. The influence of the different thermodynamic parameters on the temporal instability of the supercritical shear layer was investigated, and the magnitude and distribution of the eigenvalues were analyzed. The results showed that the instability was restrained with the increase in the pressure. With a constant velocity ratio, the temporal instability increased with the increased velocity. With a constant temperature ratio, the temporal instability also increased with the increased temperature. With the other parameters kept constant, the instability of the shear layer was dependent on the value of |T − T-∞|. The growth rate increased with the increase in the velocity ratio. The distribution of eigenvalues and their relationships with the parameters of flow field were discussed.

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