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通过实验研究了影响振荡腔室产生自激振荡的主次因素,在实验条件下对流体振荡器进行了比较和优选,在此基础上进行引入扰动的实验研究,试图为钻头内腔设计提供新的思路,尤其是为小尺寸钻头水力系统设计提供实验依据,同时也试图探索流体自激振荡增压的新途径。实验中采用了我们自行设计的可更换式振荡腔,它具有50mm~70mm三种腔径,腔长可无级调节,实验是在清水淹没无回压条件下进行的。在淹没非自由射流条件下,采用在振荡器侧面钻孔的方式引入扰动,测量振荡器出口射流的冲击压力,对实验结果进行波形分析和频谱分析。实验表明,引入扰动可以改变,甚至在一定条件下可以改善振荡器特性,设计大功率振荡器,产生自激增压,形成强有力的脉冲射流。
The primary and secondary factors that affect the self-oscillation of the oscillation chamber are experimentally studied. The fluid oscillators are compared and optimized under the experimental conditions. Based on this, the experimental research on the introduction of disturbance is attempted to provide a new Especially for the hydraulic system design of small-size drill bit to provide an experimental basis, but also trying to explore new ways of fluid self-excited oscillation supercharger. In the experiment, we designed our own interchangeable oscillating cavity, which has 50mm ~ 70mm three cavity sizes, the cavity length can be steplessly adjusted, the experiment is carried out under the conditions of no water back pressure in submerged water. Under the conditions of submerged non-free jet, the disturbance was introduced by drilling the side of the oscillator, the impact pressure of the jet at the exit of the oscillator was measured, and the waveform analysis and spectrum analysis of the experimental results were carried out. Experiments show that the introduction of perturbations can change, even under certain conditions can improve the oscillator characteristics, the design of high-power oscillator, resulting in self-excited boost to form a strong pulse jet.