In order to solve the problems of air turbines about complex structure,difficult processing and material requirements,a new type of vaneless underwater launch prime mover scheme is proposed.After simplification and assumption of working conditions,the launching system of the prime mover and pump is modeled and simulated by matlab.The results show that the change of chamber pressure in launcher tube is reasonable,the head and the flow of the pump is enough to provide the power for pushing the torpedo,and the other parameters such as power and speed of the prime mover scheme meet the requirements of each index,which provides theoretical support for practical application.
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