爆轰产物压力势能缓释方法研究

为扩大脉冲爆轰技术的应用领域 ,抑制其振动、噪声等不利因素 ,提高能源转换效率的可能性 ,本文通过实验和数值计算 ,研究了单次爆轰产物通过孔盘将压力势能缓慢释放到相邻腔体的现象。实验在长 2m、内径 40mm的爆轰管中进行 ,数值模拟采用自适应的有限体积方法和有限速率化学反应模型。实验和数值模拟分析的结果均表明 ,在爆轰管与相邻腔体之间放置孔径适当的隔离孔盘 ,可以使爆轰产物的压力势能逐渐地传递到腔体内 ,造成随时间逐渐上升的压力分布。

Study on Pressure Potential Energy Release Buffer of Detonation Products

An experimental and numerical investigation was carried out to study the possibility of pulse detonation technology offering low-noise and low-vibration power for different types of internal combustion engine. A method was suggested to smooth the pulsation of detonation energy, in which an orifice plate was used to hold the sudden pressure increase in a detonation tube and release it slowly to the neighbor chamber. The experiment was conducted in a detonation tube with inner diameter of 40 mm and 2 m in length. The numerical simulation was programmed based on the adaptive finite volume method with finite rate chemical reaction model. Both experimental and numerical results show that the high pressure caused by detonation can be transferred to the neighbor chamber gradually with proper choice of the diameter of the hole in the plate. The speed of the detonation products transported to the neighbor chamber can be controlled by adjusting the size of the aperture.