An investigation on gasoline/air pulse detonation engine with hot jet ignition. Series of Multi-cycle experiments are performed at the operation frequency of 15 Hz and 20 Hz. The initial flame propagation velocity and pressure histories are analyzed with three subjects: hot jet ignition position, fill fraction of jet sub-chamber and excess coefficient of air in sub-chamber. The experimental results show that the relative position of recirculating zone and hot jet can affect the initial flame propagation velocity. The initial average flame velocity increases from 380 m/s to 420 m/s as the fill fraction increases from 1.78 to 2.75, and it is almost invariant for the fill fraction between 2.75 to 3.45. The initial flame velocity increases as the excess air coefficient increases.
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机译：热喷射点火汽油/空气脉冲爆震发动机研究。在15Hz和20Hz的操作频率下进行多循环实验系列。用三个受试者分析初始火焰传播速度和压力历史：热喷射点火位置，喷射子室的填充分数和子室内的过量空气系数。实验结果表明，再循环区和热射流的相对位置可以影响初始火焰传播速度。初始平均火焰速度从380 m / s增加到420 m / s，因为填充部分从1.78增加到2.75，并且对于2.75至3.45之间的填充分数几乎不变。随着过剩的空气系数增加，初始火焰速度增加。
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