Research output: Contribution to conference › Paper › peer-review
Influence of upstream pulsed energy deposition on a shockwave strucutre in supersonic flow. / Zaidi, Sohail H.; Shneider, M. N.; Mansfield, D. K.; Ionikh, Y. Z.; Miles, R. B.
2002. Paper presented at 22nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference 2002, St. Louis, MO, United States.Research output: Contribution to conference › Paper › peer-review
}
TY - CONF
T1 - Influence of upstream pulsed energy deposition on a shockwave strucutre in supersonic flow
AU - Zaidi, Sohail H.
AU - Shneider, M. N.
AU - Mansfield, D. K.
AU - Ionikh, Y. Z.
AU - Miles, R. B.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - A small-scale wind tunnel experiment has been performed to investigate the dynamics of the offbody energy addition upstream of an oblique shock wave generated by a wedge model. Off-body energy was simulated by laser-induced breakdown upstream the model in a Mach 2.4 flow. Laser pulses with the energy of about 350 mJ/pulse and with a pulse width of 10 ns were used to deposit the energy in the region of interest. The dynamics of the interaction were captured in both the schlieren and shadowgraphs images taken at 500,000 frames per second rates. In order to understand the complicated dynamics of the interaction between the thermal spot and its associated shockwave with the oblique shockwave from the model, computational calculations were performed. A two-dimensional, time-accurate Euler code was applied for this purpose. Good agreement between the theoretical and experimental results has been found. As expected, the laser-induced thermal spot indeed weakened the oblique shock. The images also show the dynamics of the interaction between shockwaves generated by the laser breakdown in the flow and the oblique shock, including reflections off the wedge body. The results from this near-field experiment can be used to optimize the energy addition for the practical applications including sonic boom reduction.
AB - A small-scale wind tunnel experiment has been performed to investigate the dynamics of the offbody energy addition upstream of an oblique shock wave generated by a wedge model. Off-body energy was simulated by laser-induced breakdown upstream the model in a Mach 2.4 flow. Laser pulses with the energy of about 350 mJ/pulse and with a pulse width of 10 ns were used to deposit the energy in the region of interest. The dynamics of the interaction were captured in both the schlieren and shadowgraphs images taken at 500,000 frames per second rates. In order to understand the complicated dynamics of the interaction between the thermal spot and its associated shockwave with the oblique shockwave from the model, computational calculations were performed. A two-dimensional, time-accurate Euler code was applied for this purpose. Good agreement between the theoretical and experimental results has been found. As expected, the laser-induced thermal spot indeed weakened the oblique shock. The images also show the dynamics of the interaction between shockwaves generated by the laser breakdown in the flow and the oblique shock, including reflections off the wedge body. The results from this near-field experiment can be used to optimize the energy addition for the practical applications including sonic boom reduction.
UR - http://www.scopus.com/inward/record.url?scp=84896028614&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:84896028614
T2 - 22nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference 2002
Y2 - 24 June 2002 through 26 June 2002
ER -
ID: 62197294