Airflow Numerical Simulation and System Design of High-speed Rotating Reflector

This thesis aims at increasing the peak rotating speed of the high-speed optical reflectors without altering the driving spindle by reducing associated windage. In order to determine the relationship between windage and the shape of the optical reflectors, airflow simulations were used to find the best shape design of the reflector and the cover. At 30000 rpm, the best shape of the reflector is the two-faceted mirror with round corner and added disks whose radius is 1.1 times radius of the two-faceted mirror and thickness is 2 mm. The windage torque for the new designed reflectors, 0.037 N-m, is lower than the windage torque, 0.078 N-m, for the traditional ones. It decreases about 52% windage torque. Without much increasing the cost, the best shape parameter of the cover is that the cover radius is 1.3 times of the two-faceted mirror, the cover height is 1.4 times of the two-faceted mirror, while the windage torque is about 0.039 N-m. Regardless of the cost, above 2.4 times radius and above 1.4 times height of the two-faceted mirror is selected preferred. he reflector system of new spindle uses the design of handstand. After redesigning to reduce the weight, it is convenient to move this system. For the optical system, reflector can be adjusted to the proper altitude. The reflector system can work. By using the precision rotary device, it is convenient and quickly to adjust the optical beams. However, it is necessary to solve the oil-air problem and the deformation problem caused by clipping the two-faceted mirror in the future.