Numerical simulation of aircraft wake vortex under different B-V frequencies
To ensure the operational safety of civil aircraft and to investigate the effect of atmospheric stratification on aircraft wake vortex,the wake vortex evolution under different B-V frequency and different initial temperature conditions is investigated.The SST k-ω turbulence model is selected and the wake vortex evolution of A333 aircraft under nine atmospheric environments built by custom functions is simulated numerically using Fluent software.Subsequently,flight safety analysis was conducted based on the evolution results.The outcomes reveal that varying initial temperatures primarily influence the initial strength of the wake,with minimal impact on its subsequent development.The B-V frequency primarily influences the evolution of wake characteristics after t′=1.5.A higher B-V frequency induces the formation of smaller-scale secondary vortices above the wake,accelerating wake decay and reducing vortex core spacing.Increasing the B-V frequency leads to a significant decrease in the descent rate of the wake,causing the wake from the preceding aircraft to linger longer in the flight path of the following aircraft,thereby increasing the wake separation.
NETL
NSTL
万方数据
维普
