汽水喷射器升压特性及输出量的调节方法

利用基于直接接触凝结的汽水喷射器一维理论模型对升压特性进行理论分析，并对求解该模型的一些关键问题进行了论述，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了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。

Lifting Pressure Characteristics and Output Regulation Method of Steam-water Injector

A one-dimensional theory model based on direct contact condensation is presented to analyze the lifting pressure characteristics of steam-water injector, 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.