Abstract The effect of fuel temperature on the erosion intensity in micro-channels for different fuels like calibration fluid ISO 4113 and dodecane is investigated. A high-pressure closed loop test bench for fuels under elevated temperatures up to 160 °C is used to erode micro-channels made of Al 99.0 at a maximum pressure of 500 bar. The evaluation of the erosion intensity reveals a temperature of maximum erosion for each fuel. The temperature of maximum erosion correlates with the temperature dependence of the maximum collapse pressure obtained by the Rayleigh-Plesset equation. Infrared thermography shows a local temperature drop in the cavitation region of the channels. 2D CFD simulations with a thermodynamic cavitation model supplement the measurement results by an assessment of the temporal evolution of the temperature field. Similar to the measurements, the CFD results yield a local cooling by the thermodynamic effect and thus support the measurement results. At high fluid temperatures one crucial link between the progressing local temperature drop and the erosion reduction is pointed out: the change of the detached cloud size distribution with temperature.

中文翻译：

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温度对微通道空蚀的影响

摘要 针对标定液ISO 4113 和十二烷等不同燃料，研究了燃料温度对微通道侵蚀强度的影响。在高达 160 °C 的高温下，燃料的高压闭环测试台用于在 500 bar 的最大压力下腐蚀由 Al 99.0 制成的微通道。侵蚀强度的评估揭示了每种燃料的最大侵蚀温度。最大侵蚀的温度与通过 Rayleigh-Plesset 方程获得的最大坍塌压力的温度相关性相关。红外热成像显示通道的空化区域局部温度下降。带有热力学空化模型的 2D CFD 模拟通过评估温度场的时间演变来补充测量结果。与测量类似，CFD 结果通过热力学效应产生局部冷却，从而支持测量结果。在高流体温度下，局部温度下降与侵蚀减少之间的一个关键联系被指出：分离的云大小分布随温度的变化。