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首页> 外文期刊>International Journal of Heat and Mass Transfer >An experimentally-verified temperature control simulation model for spray evaporative cooling of vibrating powertrain parts
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An experimentally-verified temperature control simulation model for spray evaporative cooling of vibrating powertrain parts

机译：用于喷涂动力系件喷涂蒸发冷却的实验验证温度控制仿真模型

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摘要

A new simulation capability is presented to enable the performance of a hardware-based temperature control system to be assessed in thermally-managing heat-generating automotive vehicle power-train parts. Temperature control is assumed to involve spray evaporative cooling of powertrain parts exposed to vibration. Two hypotheses are proposed to enable construction of a practical simulation that is both accurate and computationally efficient. The first is that a dynamic correlation model for single-nozzle spray evaporative cooling of a fiat test-piece exposed to vibration, can be used as a reasonable model for multiple-nozzle spray evaporative cooling of component parts with curved cooling surfaces of non-horizontal orientation. The second is that the transient heat diffusion properties of a particular 3-dimensional component can be replaced by a 1-dimensional (1D) equivalence. To test this hypothesis, Finite Element models for two representative parts have been constructed and used to demonstrate the quality of the 1D heat diffusion equivalence, for which a fast Finite Difference solution can be exploited. To test the accuracy of test-piece surface temperature control simulation, an experimental test facility has been built in hardware, in which the temperature of two instrumented test-pieces exposed to vibration (from a shaker) are controlled by spray evaporative cooling. Each test piece is electrically-heated and the hardware control system is configured using PID control, for which appropriate gains are selected. Detailed comparisons of temperature control by hardware and simulation are given for the two test-pieces under static and dynamic conditions. Good agreement is generally obtained between simulated surface temperatures compared with measurements taken from both test-pieces. The paper shows that temperature control of a hardware-based control system using spray evaporative cooling of powertrain parts can be confidently simulated.
机译：提出了一种新的仿真能力，以实现基于硬件的温度控制系统的性能，以在热管理的发热汽车车辆动力列车部件中进行评估。假设温度控制涉及喷射暴露于振动的动力总成部件的蒸发冷却。提出了两个假设，以实现结构的实际模拟，这些模拟既准确和计算效率。首先是用于暴露于振动的菲亚特试验片的单喷嘴喷涂蒸发冷却动态相关模型，可用作具有非水平弯曲冷却表面的多喷嘴喷射蒸发冷却的合理模型方向。第二是，特定三维组分的瞬态热扩散特性可以由1维（1D）等价代替。为了测试该假设，已经构建了两个代表性部件的有限元模型，并用于演示1D热扩散当量的质量，可以利用快速有限差分解决方案。为了测试试验片表面温度控制仿真的精度，实验测试设施已经内置于硬件，其中通过喷涂蒸发冷却来控制暴露于振动的两个仪表测试件的温度。每个测试片是电加热的，使用PID控制配置硬件控制系统，选择适当的增益。在静态和动态条件下给出了硬件和模拟的温度控制的详细比较。与从两种测试件中取出的测量相比，通常在模拟表面温度之间获得良好的一致性。本文表明，可以自信地模拟使用动力总成部件的喷涂蒸发冷却的基于硬件的控制系统的温度控制。

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