CAJ | 학술논문

为了研究不同类型射流对起爆特性的影响，对3种不同类型射流起爆主爆震室中丙烷/空气可燃混合气体的过程进行了数值模拟。结果表明，现有计算条件下，亚声速射流不能在主爆震室中起爆爆震波，而超声速射流和爆震射流能够成功起爆；爆震射流的起爆时间和距离都比超声速热射流的要小；在爆震射流的起爆过程中，爆震射流的形成占用了绝大多数的时间，因此对形成爆震射流这一阶段进行有效的改进将可以减少主爆震管的总起爆时间。
위료연구불동류형사류대기폭특성적영향，대3충불동류형사류기폭주폭진실중병완/공기가연혼합기체적과정진행료수치모의。결과표명，현유계산조건하，아성속사류불능재주폭진실중기폭폭진파，이초성속사류화폭진사류능구성공기폭；폭진사류적기폭시간화거리도비초성속열사류적요소；재폭진사류적기폭과정중，폭진사류적형성점용료절대다수적시간，인차대형성폭진사류저일계단진행유효적개진장가이감소주폭진관적총기폭시간。
In order to investigate the effect of different types of hot jet on detonation initiation characteristics, the detonation initiation process was simulated by employing CFD software. The processes for detonation initiation with jets of different types, including subsonic jet, supersonic jet and detonation jet, were analyzed. Stoichiometric pro-pane-air mixture was used as the fuel-oxidant of the pre-detonator and main detonation tube. The simulation results and their analysis indicated preliminarily that:(1) the propane-air mixture in the main detonation tube could not be initiated with the subsonic jet, but could be initiated with the supersonic jet and detonation jet under the current simulation conditions;(2) the initiation distance and time with the detonation jet were both shorter than those with supersonic jet;(3) the generation of the detonation jet took up most of the time in the detonation initiation process with detonation jet, hence, acceleration of the generation of the detonation jet would reduce the total initiation time of the propane/air in the main detonation tube.