强旋流单重态氧发生器超低停留时间相分离研究

As the heart of chemical oxygen iodine laser (COIL), the performance of singlet oxygen generator (SOG) decided the COIL's output power and its stability. There are two bottlenecks in SOG design. One is the enough gas-liquid area for reaction; the other is the gas product singlet oxygen separating from liquid rapidly. In this program, a novel strongly swirling singlet oxygen generator was proposed design which can produce huge gas-liquid area and also have a rapid separation process is proposed. The performance of the SOG may have a great promotion with broken through the two bottlenecks restricting the development of SOG. . The core idea of PJSOG are as follows:(1) phase dispersion and strong self-swirling completed by swirling component. Large amount of gas-liquid area was formed through gas and liquid phase interaction. (2) Phase separation was completed by centrifugal force hundreds of times than gravity produced by gas-liquid swirling in ultra low residence time.. For the reason of O2(1Δ) easy quenching in liquid, two-stage separation technical route was proposed in this program. In order to reduce O2(1Δ) quenching, most of the liquid was separated and insulated from gas in the first-stage separator. Small droplets in gas flow were separated further in the second-stage separator by strong swirling flow field. To reduce the O2(1Δ) quenching in gas phase transport, axial velocity was increased to reduce the total residence time. The tasks of high separation efficiency and ultra low residence time of the novel single oxygen generator become core difficulties in this program.

单重态氧发生器作为化学激光器的核心部件，其性能直接决定了激光器的输出功率及稳定性。发生器设计中存在两个技术瓶颈，一是充足的气液反应表面，二是产生单重态氧快速与液相分离。本项目提出一种强旋流单重态氧发生器设计方案，有望突破两种技术瓶颈限制，大幅提升发生器性能。.核心设计思想是：(1)气液反应物通过旋流元件高速作用使液相破碎，形成大量反应表面，同时气液高速旋转，形成强旋流流场；（2)在极短的停留时间内，通过强旋流产生的数百倍重力的离心力的作用完成气液分离。.由于O2(1Δ)液相易猝灭的特性，本课题提出设置两级分离，为了防止O2(1Δ)液相猝灭，在大部分液相与气相分离开后通过初级分离隔绝气液相接触，气流中夹带的未分离的小液滴继续在强旋流流场中通过二级分离去除。同时提高气流轴向速度，降低总停留时间，减少O2(1Δ)气相猝灭。高分离效率低停留时间是本项目要解决的核心难点问题。