Conventional liquid fuel jet injection into a crossflow is widely used for large-scale power generation in gas turbine combustors. The authors proposed a new twin-fluid injection technique as a potential alternative and conducted a series of studies on the internal flow of the atomizer and liquid jet/spray characteristics. In this study, experimental and numerical studies were first performed on internal flow behaviors and liquid and atomizing air interactions. The important behaviors of the internal flow of the atomizer, such as the dynamic change in the liquid film thickness, the rapidly changing velocity of the wave front, and the liquid impingement distance on the inner wall of the atomizer, were measured by both the experiment and numerical analysis. Atomizing air generates a high-speed oscillating annular liquid film flow that flows at the exit of a twin-fluid atomizer. This dynamic of the annular liquid film is considered fairly advantageous for achieving good atomization, which is investigated by analyzing only the liquid's behaviors in jet/spray and twin-fluid injection in a crossflow. High-speed photography and image processing were applied to observe the liquid jet/spray phenomena in the crossflow and reveal the atomization characteristics such as jet/spray trajectories and breakup length. Furthermore, the atomizing air can dominate the trajectory of the liquid jet/spray in the crossflow. The twin-fluid injection provides improved atomization properties compared to conventional liquid-only injection.

中文翻译：

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内流及其对燃气轮机横流燃烧室双流体雾化器射流影响的说明

传统的液体燃料射流喷射到横流中广泛用于燃气轮机燃烧室中的大规模发电。作者提出了一种新的双流体喷射技术作为潜在的替代方案，并对雾化器的内部流动和液体射流/喷雾特性进行了一系列研究。在这项研究中，首先对内部流动行为以及液体和雾化空气的相互作用进行了实验和数值研究。通过实验测量了雾化器内部流动的重要特性，如液膜厚度的动态变化、波阵面速度的快速变化、液体撞击雾化器内壁的距离等。和数值分析。雾化空气产生高速振荡的环状液膜流，在双流体雾化器的出口处流动。环形液膜的这种动态被认为对于实现良好的雾化非常有利，这是通过仅分析交叉流中射流/喷雾和双流体喷射中的液体行为来研究的。应用高速摄影和图像处理来观察横流中的液体射流/喷雾现象，并揭示射流/喷雾轨迹和破碎长度等雾化特性。此外，雾化空气可以控制横流中液体射流/喷雾的轨迹。与传统的仅液体注入相比，双流体注入提供了改进的雾化特性。环形液膜的这种动态被认为对于实现良好的雾化非常有利，这是通过仅分析交叉流中射流/喷雾和双流体喷射中的液体行为来研究的。应用高速摄影和图像处理来观察横流中的液体射流/喷雾现象，并揭示射流/喷雾轨迹和破碎长度等雾化特性。此外，雾化空气可以控制横流中液体射流/喷雾的轨迹。与传统的仅液体注入相比，双流体注入提供了改进的雾化特性。环形液膜的这种动态被认为对于实现良好的雾化非常有利，这是通过仅分析交叉流中射流/喷雾和双流体喷射中的液体行为来研究的。应用高速摄影和图像处理来观察横流中的液体射流/喷雾现象，并揭示射流/喷雾轨迹和破碎长度等雾化特性。此外，雾化空气可以控制横流中液体射流/喷雾的轨迹。与传统的仅液体注入相比，双流体注入提供了改进的雾化特性。应用高速摄影和图像处理来观察横流中的液体射流/喷雾现象，并揭示射流/喷雾轨迹和破碎长度等雾化特性。此外，雾化空气可以控制横流中液体射流/喷雾的轨迹。与传统的仅液体注入相比，双流体注入提供了改进的雾化特性。应用高速摄影和图像处理来观察横流中的液体射流/喷雾现象，并揭示射流/喷雾轨迹和破碎长度等雾化特性。此外，雾化空气可以控制横流中液体射流/喷雾的轨迹。与传统的仅液体注入相比，双流体注入提供了改进的雾化特性。