College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, China.
PLoS One. 2021 Jun 15;16(6):e0253309. doi: 10.1371/journal.pone.0253309. eCollection 2021.
In current research, the hydraulic performance prediction and optimization of an engine cooling water pump was conducted by computational fluid dynamic (CFD) analysis. Through CFD simulation, the pump head, shaft power and efficiency for the original pump at volume flow rate 25 L/min and impeller rotating speed 4231 r/min were 3.87 m, 66.7 W and 23.09% respectively. For improving hydraulic performance, an optimization study was carried out. After optimization, four potential optimized designs were put forward. The efficiency of the optimized design No.1 for engine cooling water pump was nearly 6% higher than that of the original pump model; and the head of the optimized design No.2 for engine cooling water pump was 9% higher than that of the original pump model. Under the condition of maintaining the pump head and considering comprehensive improvement effect, the optimized design No.3 was considered as the best design and selected as the test case for validating the optimum design. The hydraulic performance predictions for this optimum engine cooling water pump agreed well with experimental data at design condition with relative discrepancies of 2.9% and 5.5% for the pump head and pump efficiency, respectively. It proved that performance prediction calculation model and the automatic optimization model were effective. This research work can provide theoretical basis for the design, development and optimization of engine cooling water pump.
在当前的研究中，通过计算流体动力学（CFD）分析对发动机冷却水泵的水力性能进行了预测和优化。通过 CFD 模拟，在体积流量为 25 L/min 和叶轮转速为 4231 r/min 的情况下，原始泵的泵头、轴功率和效率分别为 3.87 m、66.7 W 和 23.09%。为了提高水力性能，进行了优化研究。优化后，提出了四个潜在的优化设计方案。优化设计 1 的效率比原始泵模型高近 6%；优化设计 2 的泵头比原始泵模型高 9%。在保持泵头的情况下，考虑综合改进效果，优化设计 3 被认为是最佳设计，并被选为验证最佳设计的测试案例。该最佳发动机冷却水泵的水力性能预测与设计条件下的实验数据吻合良好，泵头和泵效率的相对偏差分别为 2.9%和 5.5%。这证明了性能预测计算模型和自动优化模型是有效的。这项研究工作可为发动机冷却水泵的设计、开发和优化提供理论依据。
