Dynamic properties of torpedo turbine rotor system in three speed-up processes

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    The transient dynamic characteristics of the torpedo turbine rotor system are predicted and analyzed in this paper. The transient motion equations of the whole rotor system are established based on the transfer matrix method and then solved by Newmark-β numerical integral method. Three different startup processes, including linear, exponent as well as staged accelerations, are involved in the simulation. The numerical results show that the critical speeds of turbine rotor system for three start-up processes are relatively close to each other. However, the peak values and oscillatory convergence time are quite different. The prediction of the staged acceleration process provides the lowest peak value at the second critical rotation rate, which is consistent with the actual situation. This paper provides an essential reference for the further design and optimization of torpedo turbine rotor system.

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  • Received:December 19,2014
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  • Online: May 26,2016
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