| 摘要: |
| 为开发出以航空煤油为燃料的新型高速燃气喷涂枪，需设计出高效的煤油雾化喷嘴.文中提出了一种双气流空气助力雾化喷嘴，并运用计算流体动力学（CFD）模拟技术计算了该喷嘴的气流场，分析了喷嘴主、辅气出口截面积比对雾化气流场分布的影响规律，发现主、辅气出口截面积比增大，气流的喷射锥角相应增大，最大速度减小.综合考虑喷射锥角和气流速度对雾化效果的影响，确定主、辅气出口截面积比在1.01~1.34范围内喷嘴雾化效果较好.利用高速摄像系统对优化喷嘴的喷雾形态进行了试验分析，发现拍摄到的喷雾形态和计算机模拟结果一致，具有良好的雾化效果. |
| 关键词: 高速燃气喷涂 喷嘴 计算流体动力学 煤油雾化 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（51375492，51575527）；国家自然科学基金青年基金资助项目（51405510） |
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| Configuration optimization of a kerosene atomizing nozzle used for high velocity combustion spraying gun |
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CHEN Yongxiong1, HU Yaoqiang1,2, LIANG Xiubing1, SHANG Junchao1,2, XU Binshi2
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1.National Engineering Research Center for Mechanical Products Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China;2.National Key Laboratory for Remanufacturing, Beijing 100072, China
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| Abstract: |
| To develop a kind of high velocity combustion spraying gun which uses aviation kerosene for fuel, an efficient atomization nozzle is needed to be developed. A double air-flow assisted atomizing nozzle was put forward in the present study. The air flow field was analyzed by using computational fluid dynamics simulation method, including investigating the effect of the primary/second gas outlet area ratio on the air flow filed distribution. The results show that with the cone angle increases, the spraying airflow increases correspondingly, while the airflow maximum speed decreases. Combining the effect of the cone angle and airflow speed, it is optimized that the range of the primary/second gas outlet area ratio is 1.01~1.34. Then a nozzle with primary/second gas outlet area ratio of 1.01 was machined and assembled on a high velocity combustion spraying gun, the atomization perform of the nozzle was investigated by using a high speed camera system. It was found that the experimental atomization profile and cone angle obtained from the camera is consistent with the simulation result. |
| Key words: high velocity fuel gas spraying atomizing nozzle computational fluid dynamics kerosene atomization |
