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Experimental investigation on the aero-optical effects of supersonic gas films with various cooling fluids
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Despite the fact that a supersonic cooling gas film can efficiently
insulate aerodynamic heating, its interaction with the mainstream
generates a sophisticated flow structure which may cause significant
aero-optical ramifications. This study aims to analyze the fluid
structure and wavefront distortion of supersonic gas film when
subjected to varying nozzle pressure ratios (NPR) by employing two
distinct cooling refrigerants, namely CO2 and air. Within the NPR range of 0 to
2, a linear relationship exists between the wavefront distortion of
both CO2 and air films, while the CO2 film exhibits higher wavefront
distortion than the air. Additionally, the influence of condensation
on the discrepancies in aero-optical effects of the two refrigerants
is discussed.
Title: Experimental investigation on the aero-optical effects of supersonic gas films with various cooling fluids
Description:
Despite the fact that a supersonic cooling gas film can efficiently
insulate aerodynamic heating, its interaction with the mainstream
generates a sophisticated flow structure which may cause significant
aero-optical ramifications.
This study aims to analyze the fluid
structure and wavefront distortion of supersonic gas film when
subjected to varying nozzle pressure ratios (NPR) by employing two
distinct cooling refrigerants, namely CO2 and air.
Within the NPR range of 0 to
2, a linear relationship exists between the wavefront distortion of
both CO2 and air films, while the CO2 film exhibits higher wavefront
distortion than the air.
Additionally, the influence of condensation
on the discrepancies in aero-optical effects of the two refrigerants
is discussed.
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