[author_cn_name].[cn_title][J].空军工程大学学报:自然科学版,[year_id],[volume]([issue]):[start_page]-[end_page] 导流块深度对圆弧形凹面腔内激波聚焦过程的影响-Impact of Depth of Deflector on Shock Wave Focusing Processes in Circular-Shaped Cavity
文章摘要
张威江1,陈鑫1,2,王川3,谭胜4.导流块深度对圆弧形凹面腔内激波聚焦过程的影响[J].空军工程大学学报:自然科学版,2019,20(3):14-21
导流块深度对圆弧形凹面腔内激波聚焦过程的影响
Impact of Depth of Deflector on Shock Wave Focusing Processes in Circular-Shaped Cavity
  
DOI:
中文关键词: 激波聚焦  径向入射  圆弧形凹面腔  导流块深度
英文关键词: shock wave focusing  radial incident  circular-shaped cavity  depth of deflector
基金项目:国家自然科学基金(51106178)
作者单位
张威江1,陈鑫1,2,王川3,谭胜4 1.空军工程大学航空工程学院,西安,7100382.先进航空发动机协同创新中心,北京,1001913.94795部队,江苏南通,226000
4.国防科学技术大学空天科学学院
,长沙,410073 
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中文摘要:
      为研究导流块深度对圆弧形凹面腔内径向入射激波聚焦过程的影响,对马赫数为1.4的径向入射激波在导流块深度分别为0、5、10、15、17.5、20、25 mm的凹面腔内反射聚焦过程进行了实验研究。用高速CCD拍摄了圆弧形凹面腔中气流流场纹影照片,并用动态压力传感器测量了聚焦过程中流场的压力变化,对径向入射激波在凹面腔内的反射聚焦过程进行了描述。通过对比不同导流块深度下激波反射聚焦过程,发现随着导流块深度的增加,凹面腔出口宽度减少,气流的排出受到限制,导致凹面腔内部的湍流度增强,由于受到湍流的较强影响,内部激波结构减弱,从而对于激波聚焦产生高温高压区产生影响,不利于激波触发爆震。
英文摘要:
      In order to study the effects of the depth of the deflector on the focusing process of the circular shaped cavity in the radial direction of the incident shock wave, experiments are carried out to investigate the radial incident shock focusing with Mach number 1.4 in cavity where the depths of deflectors are 0、5、10、15、17.5、20、25 mm respectively. With the schlieren photos of flow field in cavity captured by high speed CCD camera, the dynamic pressure sensors is used to measure the pressure variation of the flow field during the focusing process, the behavior of radial incident shock wave reflect and focus in a circular shaped cavity is described. The shock wave focusing processes of different depth of the deflectors are compared. With the increase of the depth of deflectors, the outlet width of the cavity is reduced, and the discharge of the airflow is restricted, resulting in the enhancement of turbulence inside the cavity, due to the strong influence of turbulence, the internal shock wave structure is weakened, which has an impact on the high temperature and high pressure area caused by shock focusing, and is disadvantageous to shock detonation.
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