A novel self-adjusting throttle trap valve (TTV) for use in high pressure heat exchangers was developed based on multiphase flow theory. The discharge capacity of liquid water is self-adjusted by the effective flow area occupied by the water vapor. The effect of the pressure difference (△p), gas nozzle outlet diameter (Φ3), gas nozzle inlet diameter (Φ2), and the distance between throttle and gas nozzle (L) on the self-adjusting capacity was investigated by means of CFD simulation and validation experiments. The self-adjusting capacity of the TTV increases with an increase in △p, Φ3, and with a decrease in L, but is relatively unaffected by Φ2. To evaluate the contribution of different structural parameters to the self-adjusting ability, the dimensionless self-adjusting capacity index (SACI) was constructed, based on the relation between the self-adjusting capacity and the gas flow rate. Using the SACI, it was determined that to optimize the self-adjusting capacity, a lower value of Φ3 should be chosen, while the optimal value for L was approximately 6 mm for this simulation model. This research provides new technology for the development and design of a high-efficiency TTV.

基于多相流理论，开发了一种用于高压换热器的新型自调节节流疏水阀（TTV）。液态水的排出量由水蒸气占据的有效流通面积自行调节。利用CFD研究了压差（△p），气嘴出口直径（Φ3），气嘴入口直径（Φ2）以及节气门与气嘴之间的距离（L）对自调节能力的影响。模拟和验证实验。TTV的自调节能力随△p，Φ3的增加和L的减小而增加，但不受Φ2的影响。为了评估不同结构参数对自调节能力的贡献，基于自调节能力与气体流速之间的关系，构建了无量纲自调节能力指数（SACI）。使用SACI，可以确定要优化自调节能力，应选择较低的Φ3值，而对于此仿真模型，L的最佳值约为6 mm。这项研究为高效TTV的开发和设计提供了新技术。