Abstract
A numerical investigation has been conducted to explore the flowfield characteristics of a nonreactive cryogenic fluid through a swirl injector under supercritical conditions. The shear-stress transport turbulence model along with the Soave modification of Redlich–Kwong equation of state and a flow solver using the SIMPLEC algorithm for pressure–velocity coupling are used to evaluate various features of the turbulent swirling flow. Moreover, transport properties of the cryogenic fluid are determined by using the viscosity and thermal conductivity models derived by Chung et al. Experimental data of Cho et al. are used to validate the numerical results. The present numerical work shows the capability of predicting various characteristics of transcritical and supercritical swirling flows such as precessing vortex core and wavy shear-layer structures. Numerical simulations reveal that the spray-cone angle and instability wavelength slightly increase with the ambient pressure, whereas the pitch distance of the precessing vortex core decreases. Finally, to further investigate the dynamic features of the swirling jet, several spectral analyses are carried out. The longitudinal and azimuthal hydrodynamic instabilities, acoustic waves in the gaseous core, and Kelvin–Helmholtz instabilities are clearly characterized using fast Fourier transformation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
