The ducted coaxial propeller (DCP) has great application value in eVTOL aircraft because of its high safety, compactness, and low noise. A numerical simulation method for the DCP is established using sliding mesh technique. was designed manufactured lift power test to verify method. characteristics airflow separation inside were studied, influence vortex restrain ring (VRR) on suppression augme...

Abstract In hydraulic equipment, tip clearance may result in a leakage vortex known as (TLV), which reduces the machinery’s energy efficiency. order to lessen damage brought on by clearance, this research sets angle, location, spacing, and depth of grooves significant criteria. The orthogonal approach is used design hydrofoil’s grooves. Numerous simulations are carried out using SST k-turbulenc...