In order to study hydrodynamic performance of a propeller in the free surface,the numerical simulation and open-water experiments are carried out with varying shaft depths of propeller.The influences of shaft depths of a propeller on thrust and torque coefficient in calm water are mainly studied.Meanwhile,this paper also studies the propeller air-ingestion under special working conditions by experiment and theoretical calculation method,and compares the calculation results and experimental results.The results prove that the theoretical calculation model used in this paper can imitate the propeller air-ingestion successfully.The successful phenomenon simulation provides an essential theoretical basis to understand the physical essence of the propeller air-ingestion.
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