Theodore Yaotsu Wu (Chinese: ???; pinyin: Wú Yà ozu; born 20 March 1924) is an American engineer.
He is a Professor Emeritus of Engineering Science at the California Institute of Technology.
His research contribution includes compressible fluid flow, free-streamline theory of cavities, jets and wakes, water waves and free-surface flows, mechanics of fish swimming and bird/insect flight, wind and ocean-current energy, and internal waves in the ocean.