化学激光器喷注器的流量标定
Flow rate calibration on injectors of chemical laser
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摘要: 为了给燃烧驱动连续波DF/HF化学激光器中喷注器的设计提供参考，采用原级标准（质量-时间法），对5种不同结构的喷注器进行了流量标定实验，研究了喷注器的流量特性。采用边界层的相关理论，对实验结果进行了科学解释。实验结果显示：随着入口压力的升高，流量系数增大，流量系数的范围是0.677~0.772；在入口压力相同的条件下，流量系数随着通径的增大而增大，随着长度的增大而减小；斜孔的流量系数比尺寸相同的垂直孔略小。Abstract: To provide references for the design of injectors in the combustion-driven continuous wave DF/HF chemical laser, five injectors of different structure were calibrated on flow rate by original criterion (mass-time method). Moreover, the results were explained reasonably by boundary-layer theory. The results show that the flow coefficient increases with the increase of the inlet pressure, and varies from 0.677 to 0.772. At the same condition of inlet pressure, the flow coefficient increases with the diameter and decreases with the length of the orifice. The flow coefficient of the slanting orifice is slightly smaller than the normal one with the same dimension.
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Key words:
- chemical laser /
- injector /
- flow rate calibration /
- flow coefficient
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