In order to obtain the influence of the depth of deflector on the process of shock wave focusing in a wedgeshaped cavity

tests and numerical simulation studies were carried out to investigate shock focusing on a test section where the depth of deflector was 0

5

10

15mm. CCD(charge coupled device) camera was used to obtain the schlieren photos of the flow field. Pressure sensors were used to record the pressure histories. The numerical simulation of the process was carried out by using the numerical method with high accuracy. The shock wave focusing processes of different deflectors were compared. Result showed that

with the increase of depth

the time between leading shock focusing and compressional wave focusing decreased. Because of that

the strength of shock wave focusing and the peak of pressure in bottom of cavity increased. The depth of deflector can determine the forming time of secondary shock and its degree of development

and then influence the disorder degree of the flow field during the shock wave focusing process.