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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第5期    总第261期    2016年5月

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文章编号:1672-7207(2016)05-1760-07
柴油机缸体上水孔流量测量方法对比
刘震涛,孙朝晖,孙正,黄瑞,俞小莉

(浙江大学 动力机械及车辆研究所,浙江 杭州,310027)

摘 要: 针对柴油机缸体上水孔的流量测量方法进行不同测量方案的对比研究。通过搭建精度模拟试验台对测量误差进行研究,利用流场影响模拟试验台对流场影响进行研究,为验证对比研究结果,进行上水孔实机测量试验及试验与仿真的对比研究。研究结果表明:在整个流量范围内电磁式、涡轮式的流量平均误差较小,各测量方法的流量误差随着流量及管径的减小而增大,电磁式及孔板式的变化较为明显,流量相对误差甚至超过5%。各测量方法对流场的影响随流量的增大而增加,电磁式和涡轮式影响较小。各上水孔流量最大相对误差在2.5%以下,平均相对误差在1.5%以下,且上水孔压力损失范围与趋势和模拟试验的结果也基本一致,证明测量方案的对比研究结论是有效的。

 

关键词: 柴油机;缸体上水孔;流量测量方法;流场;实机试验

Comparison studies on flow measurement methods for cylinder water hole in diesel engine
LIU Zhentao, SUN Zhaohui, SUN Zheng, HUANG Rui, YU Xiaoli

Institute of Power Machinery & Vehicular Engineering, Zhejiang University, Hangzhou 310027, China

Abstract:Several comparative studies on flow measurement methods for Diesel cylinder water hole were finished. An accuracy comparison test bench and a flow field effect comparison test bench were established. To verify the results, real machine measurement experiments and the comparison between simulation and experiment were carried out. The results show that the electromagnetic method and turbine method have relatively low average error through the whole flow range; the errors of all methods become greater when flow & caliber decrease, especially for electromagnetic method and pore-plate method whose relative error even exceed 5%. The flow field effects of all methods become greater when the flow increases (approximately followed by linear of index); the effects of electromagnetic method & turbine method are smaller than others. The maximum flow measurement relative error was lower than 2.5% and the average relative error is lower than 1.5%. The pressure loss range and variation tendency are basically consistent with simulation tests. Comparative results are proved to be effective.

 

Key words: diesel engine; cylinder water hole; flow measurement method; flow field; real machine experiment

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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