船舶限速航行的性能分析与计算

本文根据船、浆、机配合工作原理,分析船舶在限速航行时,采用不同推进方式情况下的推进性能;导出双桨船舶在一定航速范围内采用单、双桨工作时诸变量间的关系式,并给出了在同一工况下变量间的比值范围;最后结合一实船的计算结果进行了讨论.

Performance Analysis and Calculation of a Diesel Powered Ship Navigating at Limited Speed

The change of the performance of the propelling equipment in a double-screwed ship with the navigating conditions is discussed. The possibility of using different propelling means when a ship is under the condition of limited speed is investigated. The relationship between various parameters when single or double screws are working at a given navigating speed are derived and the range of specific values of the parameters under the same running conditions has been calculated. It can be seen that if a single propeller was used, the capacity of the diesel could be fully utilized and its performance improved. However, as the load of the ship and the screw are now different from the designed working condition, an unfavorable effect on the performance of the propelling equipment will result. A practical example is given and problems for attention when a single propeller is used are discussed.