Abstract
Icing will occur when helicopters pass through clouds containing supercooled droplets. The ice accreted on rotor blade affects the safety of helicopter. A numerical simulation method of helicopter rotor icing in forward flight is presented, and the icing characteristics of rotor are studied. The flow field is calculated based on the overlapping grids, and the Eulerian model is applied in the droplet trajectory calculation. The unsteady method is used to calculate rotor flow field and droplet trajectory. The icing model considering the effect of centrifugal force is adopted to simulate the ice shapes of rotor in forward flight. The average ice growth rate is compared with the ice growth rate at each azimuth angle, and the effects of blade pitch and forward flight speed on the droplet impingement and icing characteristics are summarized. Finally, the influence of time step on the calculation results is analyzed. The calculation results show that the droplet impingement characteristics and icing characterist...
Highlights
Helicopters which are lift by their rotor play an important role in the aviation field
A numerical simulation method of threedimensional rotor icing in forward flight is presented
The flow field is calculated using N-S equations in the ground coordinate system and the droplet trajectory is calculated by Eulerian model
Summary
Helicopters which are lift by their rotor play an important role in the aviation field. It is necessary to develop an unsteady numerical simulation method to calculate rotor icing in forward flight. Based on the previous research works, a numerical simulation method for rotor icing in forward flight is presented in this article. A new runback water distribution method based on shear force and centrifugal force is used in three-dimensional icing model to simulate ice shapes of rotor in forward flight. The flow field, the droplet trajectory, and the ice growth rate of rotor blade in this time step are calculated. By constructing the mass and energy conservation equation of surface liquid water, the mass of ice accretion and ice shapes of rotor blade are obtained. The ice accretion equations can be solved based on the calculation results of flow field and droplet trajectory. The specific calculation method of the parameters in ice accretion model and the effect of centrifugal force on rotor icing are demonstrated in our preliminary work.[26]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
