针对船舶中央冷却系统淡水侧向各冷却支管输送淡水时，实际流量与设计流量会有较大差别的问题，以4台冷却设备为例构建淡水侧计算模型，从简单管路的流量、阻抗等特性出发，提出阻抗平衡计算方法，采用实际算例对计算步骤进行演示，并利用Flowmaster软件对算例进行仿真，仿真结果与理论计算结果吻合良好，验证了阻抗平衡法计算的正确性，最后采用阻抗平衡法反向计算出了设计流量下的各支管阻抗以及局部阻力系数。结论表明，阻抗平衡法能准确进行管路水力计算，在船舶中央冷却系统设计过程中可进行实际应用。
In view of the problem that the actual flow and the design flow will be greatly different when the central cooling system delivers fresh water to each cooling branch, taking four cooling equipments as examples, the calculation model of fresh water side is constructed. Based on the flow, impedance and other characteristics of the simple pipeline, the impedance balance calculation method is proposed, and the calculation steps are demonstrated with an actual example. The example is simulated with Flowmaster. The simulation results are in good agreement with the theoretical calculation results, which verifies the correctness of the impedance balance calculation method. Finally, impedance balance method is used to calculate the impedance and local resistance coefficient of each branch pipe under the design flow. The conclusion shows that the impedance balance method can accurately calculate the pipeline hydraulics, and can be applied in the design of ship central cooling system.
2023,45(24): 74-79 收稿日期：2022-11-16
DOI：10.3404/j.issn.1672-7649.2023.24.013
分类号：U662.2
作者简介：王斌(1993-),男,硕士,工程师,研究方向为舰船轮机设计
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