对转桨全回转Z型推进装置及其应用

Contra-rotating Z-propeller and Its Application to Car Ferry

对转桨全回转Z型推进装置不但像普通舵桨装置一样具有良好的机动性能，且有推进效率高、空泡性能好，减振、降噪、最佳直径小等优点，是各种自航船舶理想的推进装置。本文着重介绍它的结构特点，及其所取得的优良总体性能。

Contra-rotating Z-propeller is an advanced propulsion and stcering device,which has the advantages of the high propulsive efficiency of contra-rotating propeller with the excellent maneuverability of conventional Z-propeller. The present paper describes the structure features and hydrodynamic performance of the device as well as the full-scale test results of several car ferries equipped with this contra-rotating Z-propeller