Effect of Streamwise Perturbation Frequency on Formation Mechanism of Ligament and Droplet in Liquid Circular Jet

In order to study the influence of streamwise forcing on formation mechanism liquid ligaments and droplets in primary breakup process circular jet, VOF interface capturing method-based direct numerical simulation was adopted, a range sinusoidal velocity disturbances with different frequencies were considered. The selected disturbance frequency is 0–3000 kHz. This work analyzes evolution jet surface waves at frequencies, coupling effect tip core overall spray field from structure, ligament, droplet formation. results show that affect shape distribution size field. Current provides guidance for control thermoacoustic instability engine design nozzle.