Engineering topics

Tao, Y.

Publications and source records attributed to Tao, Y..

2 records

NASA NTRS1994

Thermocapillary convection in floating zones under simulated reduced-gravity conditions

The present study demonstrated that calculated thermocapillary convection in a non-cylindrical floating zone can now be compared with measured one, by considering the lens effect of the floating zone. Flow visualization and computer simulation of thermocapillary convection in a silicone oil zone and a molten zone in an NaNO3 rod were conducted. The calculated results agree very well with the measured ones, including the free surface shapes, the solid/melt interface shapes and the velocity fields.

Tao, Y.↗

NASA NTRS1972

Space shuttle GN and C equation document no. 22: Approach guidance

The approach guidance routine for taking the space shuttle orbiter vehicle from the end of the entry phase altitude of approximately 100,000 feet to the start of the terminal guidance phase is presented. The guidance routine consists of six modes: (1) acquisition, (2) energy dissipation, (3) turn in, (4) initial approach, (5) heading alignment, and (6) final approach. Diagrams of the flight path for the various modes are included. Equations of motion governing the performance of the vehicle during each mode are developed.

Tao, Y.↗