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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >CONFINED JET IMPINGEMENT THERMAL MANAGEMENT USING LIQUID AMMONIA AS THE WORKING FLUID
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CONFINED JET IMPINGEMENT THERMAL MANAGEMENT USING LIQUID AMMONIA AS THE WORKING FLUID

机译：使用液氨作为工作流体的密闭射流冲击热管理

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摘要

The focus of the study was the conjugate heat transfer during impingement of a confined liquid jet. Two numerical models of a heat transfer process with heat transmission through a fluid-solid interface have been developed. In the first case only the fluid region has been considered while in the second case the solid region has been modeled along with the fluid region as a conjugate problem. The inlet nozzle Reynolds number has been kept at values where laminar flow can be assumed in all cases. The solid-fluid interface temperature shows a strong dependence on several geometric, fluid flow, and heat transfer parameters. The Nusselt number increased with Reynolds number. For a given flow rate, a higher heat transfer coefficient was obtained with smaller slot width and lower impingement height. A higher heat transfer coefficient at the impingement location was seen at a smaller thickness, whereas a thicker plate provided a more uniform distribution of heat transfer coefficient. Compared to Mil-7808 and FC-77, ammonia provided much smaller solid-fluid interface temperature and higher heat transfer coefficient.
机译：该研究的重点是在受限液体射流撞击过程中的共轭传热。已经开发了具有通过流固界面传热的传热过程的两个数值模型。在第一种情况下，仅考虑了流体区域，而在第二种情况下，已将固体区域与流体区域一起建模为共轭问题。进口雷诺数一直保持在所有情况下都可假定层流的值。固液界面温度对几种几何，流体流量和传热参数有很强的依赖性。努塞尔数随雷诺数增加。对于给定的流量，在较小的缝隙宽度和较低的撞击高度下可获得较高的传热系数。在较小的厚度处可以看到在撞击位置处较高的传热系数，而较厚的板则提供了更均匀的传热系数分布。与Mil-7808和FC-77相比，氨提供的固-流体界面温度小得多，传热系数更高。

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