Abstract This paper investigated the heat transfer of high temperature jet impinging a cross-shaped plate. An experimental mockup was designed and used to produce high temperature (∼500 °C) impinging gas jet with stable high speed (∼56 m/s) at the nozzle exit. A one-dimensional theoretical model was proposed to predict the temperature increment of the back-side surface(s) that opposed to the impinging surface, by simplifying and assuming the heat transfer process can be governed by convection. Three materials were selected due to its potential high heat transfer resistance, speedy installation and long duration under severe impinging conditions. For each material, four types of thermal insulation structures were designed and subjected for testing. The following conclusions from comparison of the results of the model predictions with experimental data can be drawn. The proposed simplified one-dimensional model can be used to predict heat transfer at the back-side under high temperature and high-speed impinging. The optimal case among the 12 thermal protecting designs was obtained, majorly due to low back temperature and less material consumption.

中文翻译：

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高温高速射流撞击十字形板的热防护实验研究

摘要 本文研究了高温射流撞击十字形板的传热问题。设计了一个实验模型并用于在喷嘴出口产生具有稳定高速（~56 m / s）的高温（~500°C）撞击气体射流。通过简化和假设传热过程可以由对流控制，提出了一个一维理论模型来预测与撞击表面相对的背面的温度增量。选择了三种材料，因为它们具有潜在的高传热阻力、快速安装和在严重冲击条件下的长使用寿命。对于每种材料，设计了四种类型的隔热结构并进行了测试。将模型预测的结果与实验数据进行比较，可以得出以下结论。所提出的简化一维模型可用于预测高温和高速冲击下背面的传热。获得了 12 种热保护设计中的最佳情况，主要是由于背温低和材料消耗少。