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首页> 外文期刊>Combustion Science and Technology >Numerical Investigation on Detonation Control Using a Pulse Hot Jet in Supersonic Combustible Mixture
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Numerical Investigation on Detonation Control Using a Pulse Hot Jet in Supersonic Combustible Mixture

机译：超声速可燃混合物中脉冲热流爆轰控制的数值研究

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摘要

To investigate the mechanism of detonation control using a pulse hot jet in the supersonic hydrogen-oxygen mixture, high-resolution simulations with a detailed reaction model were conducted using an adaptive mesh refinement method. After the successful detonation initiation, a contractive passway is generated between the hot jet and the main flow field behind the detonation front. Due to the contractive passway, the expansion of detonation products is prevented, hence, resulting in overdriven detonation. By setting up various contractive passways through adjusting the width of the hot jet, the overdrive degree of overdriven detonation also changes. It is suggested that the width of the hot jet has an approximately linear relation with the relative and absolute propagation velocities. When the contractive passway gradually disappears after the shutdown of the hot jet, overdriven detonation attenuates to the dynamically stable Chapman-Jouguet (CJ) detonation. When the contractive passway is re-established once again after the reinjection of the hot jet, the CJ detonation develops to the same overdriven detonation, indicating that the contractive passway controlled by the pulse hot jet can indeed control detonation propagation in the supersonic combustible mixture to some extent.
机译：为了研究在超声速氢氧混合气中使用脉冲热喷射控制爆轰的机理，使用自适应网格细化方法对高分辨率的详细反应模型进行了模拟。成功引爆之后，在热射流和引爆前沿后面的主流场之间会产生收缩通道。由于收缩的通道，阻止了爆炸产物的膨胀，因此导致了过度驱动的爆炸。通过调节热射流的宽度设置各种收缩通道，过驱动爆轰的过驱动度也会改变。建议热射流的宽度与相对和绝对传播速度具有近似线性关系。当热通道关闭后收缩通道逐渐消失时，过度驱动的爆炸会衰减为动态稳定的Chapman-Jouguet（CJ）爆炸。在热喷射重新注入后再次建立收缩通道时，CJ爆震发展为相同的过驱动爆轰，这表明由脉冲热喷射控制的收缩通道确实可以控制超声速在可燃混合物中的爆炸传播，从而达到在某种程度上。

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