Gas Dynamic Effect of Microwave Discharge on Supersonic Cone-shaped Bodies

Joule heating flow control methods for high-speed flows

“…The rarified channel is set to have the same static pressure and velocity as the rest of the domain thus, based on the ideal gas law, the temperature is increased due to the lower density. This methodology has been used in a number of studies by Azarova et al [138][139][140] This study also went some way to validate the results of the computations by comparing them to experimental results of Lashkov et al, 130 however this was limited to the generated microwave filament and not its effects on the flow.…”

“…Lashkov et al 130 demonstrated experimentally that a bow shock could be controlled by upstream microwave generated plasma discharge. Their experimental study used the parabolic mirror method to focus the microwave radiation to a spot in the supersonic flow.…”

“…This is important depending on the study as it has been shown that microwave streamers can cause either an increase or a decrease in drag depending on their orientation. 130 The thermochemistry model also allows the gas processes which result in the rapid heating to be better understood. The findings of Knight et al, 143 as shown in Figure 55, validated against experimental results show that this type of model can accurately model the impact of microwave energy deposition on high speed flows.…”

High Speed Flow Control Using Microwave Energy Deposition

“…The cylinder diameter is D = 3 cm. The freestream conditions correspond to recent experiments of Lashkov et al [11]). The depolarization factor q was set to zero to simulate the formation of the microwave filament at the core of the discharge.…”

“…Control of the filament orientation by a laser precursor pulse or other technique is therefore essential. Indeed, the interaction of off-axis plasma filaments with blunt bodies has been demonstrated experimentally to cause an increase (rather than a decrease) in drag [11].…”