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Experimental investigation of effect of partial filling on the impulse of pulse detonation engine

机译:部分填充对脉冲爆震发动机冲量影响的实验研究

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Using poor-detonable liquid C_8H_16/air mixture with low-energy system (total spark energy of 50 mJ) and a new one-step detonation initiation method developed in this study, partial-tube fill experiments have been conducted in a fixed length PDE tubewith a fuel/air mixture section of different length, covering a wide range of the detonation tube fill fraction (ratio of fuel/air mixture length to tube length). Impulse was calculated by integrating the pressure differential at the closed end of the tube. Based on the results obtained experimentally, it is found that the fuel-based specific impulse declines when fill fraction increases. On the other hand, the total-mixture-based specific impulse rises as fill fraction increases. A multi-cycle partial-fill model is developed to predict the impulse obtained from a partially-filled detonation tube, which is valuable for the optimization of PDE performance.
机译:使用具有低能量系统(总火花能量为50 mJ)的易爆液体C_8H_16 /空气混合物和本研究开发的新的一步爆轰引发方法,在固定长度的PDE管中进行了部分管填充实验。一个不同长度的燃料/空气混合物段,涵盖了爆管填充比例的广泛范围(燃料/空气混合物长度与管长之比)。通过积分管封闭端的压差来计算脉冲。根据实验获得的结果,发现当填充分数增加时,基于燃料的比冲减少。另一方面,基于总混合物的比冲随着填充分数的增加而增加。建立了多周期局部填充模型,以预测从局部填充爆震管获得的脉冲,这对于优化PDE性能非常有价值。

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