两相流喷射器流动模型研究

Journal of Refrigeration(2010)

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Abstract
研究了压缩/喷射制冷系统中两相流喷射器内的射流发展过程,沿喷射器内部射流的流动方向分段对射流压力调整过程、射流混合、均匀过程和扩压过程进行建模,得到喷射器的引射比和出口背压随冷凝温度与蒸发温度的变化特性。模型的预测结果与实验测试结果在变化趋势上完全一致,压缩/喷射制冷循环中的冷凝温度越大,喷射器的引射比和出口背压越大,节能效果越好;蒸发温度存在一个最佳值,使得引射比最大,出口背压增大效果较好。
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Key words
Power machinery and engineering,Two-phase ejector,Compression and ejection refrigeration cycle,Nozzle,Jet flow
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