Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)
- 2004.03a
- /
- Pages.784-788
- /
- 2004
- /
- 1975-342X(pISSN)
Investigation of the shock structural formation of the supersonic nozzle jet with longitudinal variation of coaxial pipe location
- Roh, Sung-Cheoul (Korea Institute of Machinery & Materials Thermal Fluid System Department) ;
- Park, Jun-Young (Korea Institute of Machinery & Materials Thermal Fluid System Departmen) ;
- Kim, Soo-Yong (Korea Institute of Machinery & Materials Thermal Fluid System Department)
- Published : 2004.03.01
Abstract
A visualization study of shock formation of the supersonic jet nozzle using a Shadowgraph Method (SM) was carried out to investigate the effect of the longitudinal variation of coaxial pipe end tip position inside the supersonic nozzle. The experiment was performed for the Mach number range from 1.1 to 1.2 at nozzle exit. The well known shock cell structure was shown with the pipe end located deep inside the nozzle for the studied Mach number. With the pipe end approaches nozzle exit, it was found that the shock cell structure disappeared and turned into complex formation. In order to understand the mechanism of the shock structural change, computational simulation was carried out using the Navier-Stokes solver, FLUENT. Topological sketch was added with an aid of the visualization and the numerical simulation.