由气蚀引起的损坏是燃油喷射系统中的一个严重问题。本文介绍用放射性同位素Fe59示踪法测得柴油机喷油泵回油腔内挡油螺钉气蚀程度随时间变化的关系。结果表明,起动时的挡油螺钉每小时的腐蚀量是在毫克级范围内,而经过运行一段时间以后,其腐蚀量约下降1千倍。本文是格拉兹工科大学理论物理研究所的报告。 Damage caused by cavitation is a serious problem in fuel injection systems. This article describes the use of radioactive isotopes Fe59 tracer method measured diesel fuel injection pump cavities screw cavitation cavitation erosion with time changes. The results showed that the amount of corrosion per hour of the oil deflector screw at start-up was in the milligram range, and the amount of corrosion was about 1,000 times lower after a certain period of operation. This article is a report of the Institute of Theoretical Physics at Graz University of Technology.