| 升压汽水喷射器的理论模型及输出量的解耦控制 |
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| 引用本文：黄云鸿，李刚.升压汽水喷射器的理论模型及输出量的解耦控制[J].计算技术与自动化,2011,(4):19-22 |
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| 中文摘要:针对汽水喷射器内所产生的凝结和激波现象，使其升压过程和机理非常复杂，提出利用直接接触凝结理论建立升压汽水喷射器的理论模型，并对求解该模型的一些关键问题进行论述，如采用平均凝结换热系数计算相间质量传递及利用汽羽确定各相体积分数等。根据该理论模型给出升压式汽水喷射器出口温度和流量的调节方案，理论分析表明出口温度及流量的调节是解耦的，调节进水的质量流量可控制出口温度；调节蒸汽喷嘴的喉部截面大小可控制出口质量流量。结合相关的实验结果表明输出压力具有定量特性，只须调节出口背压即可以实现对输出压力的调节且不影响进口状态。 |
| 中文关键词:喷射器 两相流 直接接触凝结 相变 汽羽 解耦控制 |
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| Theoretical Model and Output Decouple Regulation of Lifting Pressure Steam-water Injector |
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| Abstract:Taking into account the process and mechanism of lifting pressure were complex due to the condensation and shock wave, a theoretical model based on direct contact condensation is presented, and some key issues, such as inter-phase mass transfer computed by the average condensation heat transfer coefficient and phase volume fraction determined by steam plume, are discussed in detail. The regulations of discharge mass flow and output temperature are decoupling control according to the theory model, and the inlet water mass flow is to determine the output temperature, the variable throat section of steam nozzle is to determine the discharge mass flow. The regulation of output pressure is just to change backpressure, and the regulation does not affect the input states according to the relevant experiments. |
| keywords:injector two-phase flow direct contact condensation phase change steam plume decoupling control |
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